Vernal Equinox 1989 No. 62 ISSN 0715-4747

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President

First Vice-President

Second Vice-President

Secretary

Treasurer

Directors

Awards

Computing Facilities

Education

Heritage

C.A.S. Board of Directors

G. Michaud, U. de Montreal

S. van den Bergh, D.A.O .

L. Higgs, D.R.A.O .

C. Aikman, D.A.O.

J. Climenhaga, U. of Victoria

P. Martin, C.I.T.A. S. Pineault, U. Laval R. Roger, D.R.A.O.

C.A.S. Committee Chairmen

P. Martin, C.I . T.A.

C. Pritchet, U. of Victoria

R. Bochonko, U. of Manitoba

P. Millman, H.I.A.

Optical and Infrared Astronomy G. Harris, U. of Waterloo

Radio Astronomy

Small Grants

Space Astronomy

Editor:

Address:

Telephone:

FAX:

BITNET:

P. Dewdney, D.R.A.O. (acting)

C. Purton, D.R.A.O.

J. Hesser, D.A.O.

Colin Scarfe

Department of Physics and Astronomy

University of Victoria

Victoria, B.C. V8W2Y2

(604)721-7740

(604)721-7715

SCARFE@UVPHYS

Cassiopeia No. 62 Vernal Equinox 1989

CANADIAN ASTRONOMICAL SOCIETY

SOCIETE CANADIENNE D'ASTRONOMIE

CONTENTS

Editorial Notes on the AGM Kingston Meeting Advance Notice Joint Subcommittee on Space Astronomy Report Spektrum X/Gamma: an Opportunity for Canadians News from the Laval Liquid Mirror Facilities CAne Newsletter No. 7 From the DRAO Users' Committee Comment Devenir Membre de l'1cAT Inc . Membership in CITA, Inc. Membership of CITA, Inc . Small Grant Holder's Report Bumps and Wiggles in Baltimore Request for Illustration Material CASCA Journals Programme Positions Available

1 . U of Victoria 2 . U of Toronto

Canadian Astronomy Publications CAne lRAF Workshop Questionnaire

J . Hesser J . Hesser

E . Borra

2 2 2 3 6 8 9

10 11 12 13

J . Climenhaga 13 D. Gies 14

J . -R . Roy 15 A. Batten , D. Brueckner 15

17 18 19 22

DEADLINE FOR THE SUMMER SOLSTICE I SSUE WILL BE MONDAY JUNE 5, 1989

EDITORIAL

Readers will notice that progress toward the goal set by the Board of Direc tors of a uniform style for Cassio1,eia is slow: this is due in la rge measure to my being a slow learner of the intricacies of TeX. But my ach'ance toward the goal would . I th ink . be great Iy a ided I I)' some assistance from readers a nd/or contributors. Illis ass istance could take eithe r of two forms.

I. Would contributors please send their material by elect ronic mail ? If this is impossible, please send your material ea rly (as did the two Sma ll Grant recipients who report on the use of their grants in this issue), so that I In",e time to type it into the cOlllPuter as a TeX fil e.

2. \Vould one of the many who are more expert with IeX than I am please adv ise me on how to deal with material such as the preprint list, or the ques tionnaire that ends this issue. So far I have been unable to find in a TeX manual a sutficiently simple procedure for formatting such articles !

Normally the summer solst ice issue of Cassiopeia appears after the Society' s Annual General }'Ieeting, and in recent years it has included much material from the meeting, thanks chiefly to the strenuous effor ts of Chris Aikman. our Secre tary for the past six years. This year's mee ting is so late . however, that to follow the same routine would mean that the issue would be delayed until long after the solstice. Therefore, with the 8e,reement of the Secretary and of the LO C Chairman for the AG:-'I. Serge Demers. I sha ll prepare the next issue in June, before the meeting. Indeed in order ( 0 ma ke it possible to publi sh last minute items for t he meeti ng in that issue, I plan to di s tribute it slight ly before the Solstice. Hence dead line for receipt of contributions is ea rl y, as ind ica ted at the fuot of the Table of Contents. rd aterial from the AG }' I will appear in the Autumnal Equinox issue.

Colin Scarfe

NOTES RE THE ANNUAL GENERAL ]"IEETING

Ser::;e Demers , LOC chairmnn for the AG~'l, has asked me to draw members ' att'''ltion to the following matters that were not ment ioned in the material a lready dist ribll ted. I. The day of sess ions devoted to C FHT results is scheduled thi s year to commelllura te

the telescope 's tenth anniversary. 2. Informa tion on parking for t hose planning to drive to II Iont ren l:

a . It costs $4.00 per day to park on campus. h. The price of $27.00 for a room in the residence includes free parking. Bll t st udents

paying $17.00 h ave to pay $4.00 per day to park.

Colin ScHt-fe

1989 KINGSTON l'\'lEETING - ADVANCE NOTICE

T he next "I\ingston" I1l cc tine; " 'ill be held at the 0 .. -\ .0. Octol",r 13-1·L the Fl'id,w and Saturday nfter TIHlnksgiving. Tile theme will be "The .-\ge "nd Evolution of t. he Ga la cti c Disk and Halo". and Allan Sa nda!!;e will be one of the s[l c·akers. !l Iore details wi ll be pllblished in the SII111mor S"b ti ce iss ll e of Citssiopcia. FOlr d IOse illt cres ted ill atl"nding, the (olltact people a rc Sidllcy \" 111 den Bergh fu r sc ientifi c IIlatters and Chris .-\ ikll"' n for 1()cH l arra ngenlc ilts.

3

JSSA REPORT: MARCH 1989

The Joint Subcommittee on Space Astronomy, JSSA, met at the Dominion Astro­physical Observatory, NRC, Victoria on 13-14 J anuary 1989. The main item of business was to formulate priorities for expenditures for transmission to NRC's Space Division, CASCA and ACA. Committee members present were: Caldwell (York), Clark (Calgary), Clayton (NASA), Fahlman (U n C), Hesser (NRC, DAO) , Hutchings (NRC, DAO), Morton (NRC, HIA), Shara (STScI), Purton (ACA); Atkinson and Colley (NRC, SD) represented Space Division Director VanKoughnett and van den Bergh represented CASCA President Michaud. In addition, Dewdney (NRC, DRAO) , Durand (NRC, DAO, CADC), Kwok (Calgary), Naylor (Lethbridge), and Woodsworth (?\RC, DAO , CADC) participated in portions of the meeting.

Recommendations

Following review and debate of possible space astronomy options, * and previous actions of this committee and of the Canadian astronomical community, the JSSA submitted recommendations, summarized as follows (note that at Dr. Atkinson's request, the $ figures discussed have been omitted from this summary):

1. LYMAN/FUSE (NASA): This is the highest priority international space astronomy opportunity for Canadian participation. We suggest that Canadian representatives clarify the hardware options that are advantageous to hoth sides. \Ve further recommend that Canada negotiate with NASA to include appropriate representation of Canadians on all committees to reflect our support of the mission. The team should be selected from interested Canadian astronomers who are prepared to commit time to the project and who have appropriate scientific experience. Canada should also negotiate an appropriate percentage of time on the satellite in the operational phase. The awarding of Canadian time should be based on a peer review process.

At this time we do not see the need for a Canadian operations centre for Lyman. We recommend that the data, when they become public, be archived in CADC, so that all Canadian astronomers will have access to them .

Finally, we recommend to the Presiden t , Canadian Astronomical Society and/or the Chairperson, Associate Committee on Astronomy, that our strong interest in the science program of the Lyman mission be made known by mid-February, 1989, to Dr. Charles Pellerin, Jr. (NASA) . (N.B.: Dr. I\lichaud sent a le tter.)

2. RADIOASTRON (USSR + il lany Others): JSSA. notes the strong interest expressed in the RadioAstron mission by members of the Canadian astronomical community. \Ve reaffirm our support for the Canadian commitment to this mission as expressed in the USSR-Canada protocol signed as a result of the 21-25 Nov. 1!l88 meeting in Ottawa.

Some concern was expressed about the revised budget estimates needed to meet these commitments. JSSA recommended a budget ceiling to Space Division. If a significant overrun appears likely, the scope of the Canadian commitment must be re-evaluated.

3. ISO (Netherlands/UK): The very high sc ientific potential; level of Canadian inter­est; and firm , near-term (1!l92- 1993) launch commitment aroused strong interest in the proposal by Prof. I<wok and his colleagues to participate in the Dutch Short Wavelength Spectrometer (S\\'S) experiment. At the same time we recognize that the immediacy of this proposal poses challenges to the Space Di vision regarding cash flow and such mandate

* The activities reviewed were: IladioAstron (USSR), Lyman (NASA/FRG), SUVT170

fUSSR ), Planetenteleskoop (FRG) , Spektrum X/-r (uSSR), Infrared Space Ohservatory ISO, Holland), FOCUS (C,lllada), Small and Rapid Response Payloads for Space Station SARR. NASA. ESA . .lapan , Canada), ilnd the Canad ian Astronomy Data Centre.

questions as cash transfer out of Canada, and funding software development in the absence of an associated Canadian hardware component.

(N.B.: Unfortunately, it proved impossible to surmount the problems posed to the Space Division mandate; subsequently, Prof. Kwok submitted a proposal to NSERC.)

4. CADC: The welcome news was reported that Space Division is in the 'process of implementing the JSSA request from February, 1!l88 to fund the direct costs of acquiring the data from the Hubble Space Telescope for archiving at the CADC. JSSA recognizes that the initial decisions regarding the exact data products to be acquired (raw data, pipeline processed data, special data products, etc.) will have to be reviewed once experience with CADC operations is gained.

(N.B. : Discussion about relative priorities of the data products and their impact on the funding envelope raised questions that had to be addressed after the meeting. STScI has since decided that bulk data flow to CADC will begin at the expiry of the proprietary period (i .e., one year after launch). The CADC Advisory Committee has strongly endorsed the acquisition of the raw data as the highest priority.)

5. SPEKTRUM Xh (USSR + Many Others): The Committee recognizes the scientific potential of involvement in this project and that there is significant Canadian interest. In principle the requested provision of on-board memory for the extreme ultraviolet EUVITA telescopes and Soviet X-ray telescopes could be at a low cos t . However, we are concerned over cash flow during the relevant time frame and need budget clarification over the next few months. In the meantime. we recommend Canadian attendance as invited at the project team meetings to clarify the nature of Canadian scientific participation. 'vVe also urge investigation of possible export embargo problems with the proposed electronic items, and investigation of alternative suppliers .

(N.B.: See separate report on the Moscow meeting elsewhere in this CaJJiopeia.)

6. SUVT170 (USSR + Others): The JSSA regards the scientific potential of this mission, especially of its unique wide-field UV imaging capability, very highly. Since the launch is in 1997, we could influence the mission parameters and optimize our contribution. Because of the more immediate requirements of the missions described earlier, we are unable to recommend specific commitments by Canada to SUVT170 at the present time. However, we strongly recommend that the Space Division continue to support Canadian­Soviet meetings to define and cost possible Canadian cont ributions. which the Soviets have suggested might include: large format ultraviolet detectors, microprocessors for instrument control, on-board memory for data storage, and design of spect rographs and cameras.

7. FOCUS (Canada): It appears possible to pursue a UV imaging survey mission with the FOCUS carri er, assuming collaboration with a partner with launch capability. Such a payload would probably cost $5-lOM , but would be an a ll-Canadian initiative with excellent science potential. Such a mission should be kept in mind as an alternative option should Lyman and RadioAstron not continue as funded projects. It is also noted that the US Small Explorer program may include a mission with similar science goals, which might make this proposal redundant.

8. SARR (Space Station): The international Small Attached and Rapid Response Payloads study group (with Canadian participation) has ident ified a number of exciting astronomy opportunities for deployment on Space Station Freedom, (e .g., an all-sky X­ray monitor, a multi -wavelength all-sky monitor . a UV spectroscopic survey instrument , a broadband transient monitor, etc.). We recommend that Space Division cont inue to support Canadian participation in relevant meetings tiU that awareness of options may be kept open for possible Canadian participatiun towards the second half of the 1990s.

The Future Structure of JSSA

Following response of the Board of Directors of CASCA to the document entitled "JSSA, Space Astronomy Priorities, CASCA and ACA (30 Nov. 10S8)" (summarized in Ca •• iopeia No . 61 , p. 5), amendments were discussed and approved , and Dr. Michaud has acted upon the recommendations arising. Changes are that new JSSA members will be appointed by NRC in close consultation with CASCA and taking into consideration recommendations from JSSA and its parent bodies (through their ex-officio members on JSSA); calls for persons interested in serving will be announced annually in CaJJiopeia well in advance of the summer CASCA Board meeting. (N.B.: NRC is mentioned before CASCA in order to acknowledge that it is NRC financial support which allows committees joint with CASCA, such as this one, to meet as required.)

Several further comments were made. First, the Space Division strongly prefers that the Chairperson be someone who has served on the JSSA for some time, because conti­nuity of advice is of great importance to them. Second, it is proposed that the retiring chairperson be retained as an ex-officio member for one year. Third, although we want to keep paperwork to a minimum, it will be important for the Committee or its parent bodies to provide guidelines to the community as to what constitutes a proposal for its consideration and how that proposal will be judged.

NSERC and NRC General Funding Issues

The imminent launch of HST and the CADC funding situation raised an intense dis-cussion in the waning minutes of the meeting centered on three issues:

i. Technical personnel required to operate CDAC, including the data transfer from STScI; ii. Scientific personnel required to interact with STScI and the users in Canada; and

Iii. Operating funds required to analyze HST science data, and to prevent an accelerated "brain drain" to the U.S., where extcnJive new monie. are already approved for Juch analYJij .

These issues are quite complex and JSSA has no specific recommendations at this time. There was some feeling that the division of responsibilities among NRC (HIA, SD) and NSERC is somewhat artificial and does not always reflect the realities of participating in a large international project, such as the HST. At the present time both HIA and SD are co-operating to fund CADC activities. Given the impact that HST will have on all areas of astronomical research and the increasing demand for operational funds and scientific personnel needed to take advantage of the opportunities presented by HST and future space missions , it is apparent to the JSSA that the role of NSERC should be carefully examined. It was agreed that the JSSA would communicate its concerns to the CASCA President and outline areas in which NSERC might contribute to the support of space astronomy activities. Fahlman agreed to draft the letter to CASCA. Contingent upon the support of the CASCA board, we will seck a mceting with NSERC management to explore the issues with a vicw to enhancing NSERC support for space astronomy.

James E. Hesser , Chairman 11 tI'larch 1080

6

SPEKTRUM Xj-y: AN OPPORTUNITY FOR CANADIANS

Want to influence decisions on the future of astronomy in Canada? Then plea.e read this and let me know ASAP if you or your students would be interested in using such a facility (bitnet: Hesser@NRCDAO.NRC.CA). Thanks!

Some Background

Last November, the USSR signed a protocol inviting Canada to join them and many other countries in a well-advanced satcllite project headed by R . Sunyaev and consisting of some ten independent telescopcs. Science goals are aimed at phenomena manifesting themselves in the extreme UV, X-ray and ,-ray regions, i. e., AGNs, X-ray binary stars and the bizarre beasties therein, white dwarfs, structure of the Galactic disk, etc. lv!ajor Western participants include the Danish Space Research Institute, which has committed essentially 100% of its resources; and the UK/FRG/ltaly, who are well along in design and breadboarding of the twin JET-X telescopes. Severallatecoming U.S. labs are finalizing negotiations to provide major components . Other significant players include Bulgaria, Czechoslovakia, Finland, France, GDR, Switzerland and, possibly, Australia.

An interesting article, "'Glasnost' in space science" by Ken Pounds reflects on philo­sophical aspects of the British- and vVcstern- participation in this mission (Phy .. ic. World, Feb. 1989, p. 13).

With Ken Lund, an experienced electrical engineer of NRC's (now Space Agency's) Space Division, I attended a week-long meeting of some 100 Western and Eastern Bloc scientists and engineers in Moscow 27 Feb - 3 March. My participation was in my capacity as JSSA chairman, and certainly not for any demonstrated competence in high-energy as­trophysics! Although I went to the meeting with many concerns, I re turned persuaded that this is a viable international mission of excellent scientific potential led by an outstanding scientist (Sunyaev), from which Canada could derive a great deal for a modest investment.

Spacecraft Overview

Launch: 1993 Sept . Lifetime: >3 yrs. Perigee: 500 km. Apogee: 200,000 km. Period: 4 days. Inclination: 51.5 degrees. Payload Mass: 2450 kg. Basic Platform Dimensions: 2.4 by 3.0 m. 3-Axis stabilization with 1.5-2 arcmin pointing accuracy and 30 arc sec stabilization. Approximately 1 hour of high speed data telemetry per day (limited by committments of the USSR ground stations to other spacecraft). On-board computer: Std 1553, U.S. Mil Specs (!).

Most instruments will point at the same direction on the sky, but a slewing platform will allow some to point in another direction . 4-5 targets would be observed per day.

Representative Instruments

Each instrument is being designed to be independent of the others, by, e.g., inclusion of on-board memory, control computers, etc. The following gives a flavor of the mission capabilities.

1. X-Spect or SODART (USSR, Denmark + others): a thin foil , high-throughput X­ray telescope - actually, two independent telescopes - with eight focal plane positions to take image proportional counters, an X-ray polarimeter (Novick: Columbia University) , a cooled silicon spectrometer (Finland), etc. Energy range: 0,2- 20 keY; field of view Ix1 degree. A great deal of developmental work has already OCCUlTed in both the USSR and Denmark towards realization of this fa cility.

2. JET-X (UK, FRG , Italy, ESA , USSR): a grazing incidence X-ray telescope with high angular resolution (better tha.n 30 mcsee; target is 10 arcsec). Includes a broadband

spectrometer (1-10 keY, R>lO) and a higher resolution one (R>50) near the 7 keY Fe-line complex, and an optical monitor capable of reaching V-22. A direct data link between the Space Research Institute (IKI) in Moscow and Rutherford Appleton is planned. The engineering studies are well advanced, and the British are committed to a 1993 launch (in part because of cash flow problems if it is delayed).

3. All-Sky Monitor (Los Alamos): Bill Priedhorsky estimates a 5<1 detection of a 2 milliCrab source in one day in the 3- 6 keY band. For study of long-term phenomena (e .g., the 294 day period of Cyg X-I), as well as detection of bright, fast transients.

4. EUVITA (USSR, UK(?), Switzerland, GDR, Canada (?): three modules containing four normal-incidence extreme UV telescopes, each with 150 mm mirrors to cover bands centered at 70, 100, 175 and 250 A. The latter is a region that contains many bright lines in white dwarfs, while the former primarily provides continuum points to complement the X-ray telescopes pointed at the same object. Since so little is known about the extreme UV (although another U.S. Explorer should have flown by then), the EUVITA will be used to study the transparency of the interstellar medium, as well as properties of white dwarfs, AM Her systems and other stars already known to be visible at these energies. Switzerland is planning on providing the MCP detectors, while the Soviets, among others, appear to have the telescope optics technology in hand.

Possible Canadian Participation

At the November meeting, it was suggested that Canada supply on-board solid-state memory for the Soviet experiments (e.g., X-Spect, EUVITA, MART- a coded-mask, hard X-ray imager, ART-SP- a coded-mask, wide-angle, X-ray imager, etc.), so that they wouldn't have to rely on heavy tape recorders . In addition, provision of digital electronics, detectors, and/or integration and testing for EUVITA, or of a star tracker for X-Spect and/or the slewing platform, were suggested.

During the Moscow meeting, Canada was also invited to help the USSR and Scandana­vian countries provide a 30 em aperture, f/34 bent Cassegrain optical/UV monitor with an 8 arcmin field of view for the X-Spect telescope. The similarity of this monitor with ideas we have proposed in the past (e.g., the AXAF monitor , the FOCUS platform exper­iment, etc.), fell on my receptive ears, and exploration is underway with Prof. Jorgensen (Copenhagen) regarding what form our contribution might take.

A general problem for the Western partners concerns export controls. Dr. Bunner, the NASA Chief Scientist for X-ray and ..,-ray missions, reported that progress is being made on an approach to packaging (non-radiation-hardened) memory in a way acceptable to their Defense Department (basically, any attempt to extract the chip would destroy it). Should NASA be successful, it should increase chances for success with the respective agencies in other countries.

At present , provision of memory and possible collaboration on the optical/uv monitor seem most likely to tit the modest budgetary resources available to Spektrum Xj-y in the Space Division budget for the nex t few years. (As reported by JSSA elsewhere in this CaJJiopeia. the budget constraints arise from other projects (e.g., Lyman, RadioAstron), depending upon their schedules.) We have promised the Soviets we would respond to their invitation by late. May, i. e. , in phase with the U.S.

\,yhat's In It For Us?

Through an investment quite modest by space standards, Canada might be able to provide significant amounts of mass memory and, perhaps , some small contribution to the monitor. In return. we would be part of the team deciding what objects will be observed by the instruments that make use of our memory and can forge collaborations throughout

8

the extensive Spektrum X/.., consortium to pursue science of interest to Canadi ans. \V" will have guaranteed access to portions of the data bases generated by t he instruments WI'

support , and to much more through collaborations. One of my re"sons for enthusiasm is the excellent atmosphere of cooperation that exists in this project. which suggests liwt the science return per dollar im'cs ted will be ex trcmly favorable, and that "veuues for sl ud,' ing objects already under intense scrutiny in Canada would be broadened signiticantly. I It goes without saying that all Canadian astronomers would be invited to submit proposals for peer review.)

Who's Interested?

If you've gotten this far, I hope you'll use my E-m ail address at the beginning to let me and JSSA know if you think you would use, or encourage your students to use, data from this facility. I would also like to know if someone in the community would like to act as lead scientist in the ne!(otiations with the Soviets and Europeans , supported by the excellent, experienced Space Division engineers and scientists.

James E . Hesser 11 }"!arch 19S!)

NEWS FROM THE LAVAL LIQUID MIRROR FACILITIES: AIRY PATTERN VIDEOTAPED

Improvements to the optical testing setup have now allowed us to improve the image quality to the point that we are now very nearly diffraction limited.

Viewing the image of a small pinhole with a CCD camera, we can clearly see the Airy diffraction pattern of the 1.5-meter primary mirror. O\'(~rexposed images sliow sC"ern l rings at the predicted locat ions. \Ve have "ideotaped hours of data and find that the Airy pattern is visible most of the time. \Ve work in a large basemellt room lined wil h thick concrete walls and ceilin.!!;, this very stable working environ ment explains the outstanding seeing that allows us to see direc tly the Airy pattern. To the best of our knowlcde;e. thi s is the fir st time that the Airy pattern of it large mirror has been seen direc tl y. Tlie f<let that we see the Airy pattern is a s trong indication that we are "cry ncar tli e dili'ra ction limit of our mirror.

\Ve have begun interferometric measurements with a Smartt interferometer. 0111' tirst interferograms contirm that we are indeed very near the difl'raction limit of the mirror.

fl ecent developments with our thin-layer technology allow us to use very tliin stable layers of mercury (1 millimeter thick). At present, these layers have been Illade on a Hat nonrotating container. \Ve will soon implement them on a small rotating mirror and t.est the surface finish. If our tests will show tliat thin layers give optical-quality smfaces. we \I'ill have achieved a major breakthrough. The implementation of l ·lllm· thick mercllry layers would allow liS to decrease costs substantially, to the point tliat a 4-m mirror may eventually cost only" few tens of thousands of dollars.

Ennanno F . BOlTa

9

CANADIAN ASTRONOl\IY DATA CENTRE

Newsletter No.7

IRAF \Vorkshop and ADS D e mollstt·ation

Recently, we held a highly successful IlI .-\F \yurks llUp at 0 .-\0. " 'e plan to repeat this session in Montreal just prior to the C_-\SCA meet iug. Information is available elsewhere in this issue.

Additionally, we are trying to arrange a demonst ration of t he Astrophysics Data System being developed for NASA. This is a multi -spec tral data base, which is intended to point the user towards databases contaiuing a ll NASA space- based astronomical data and some ground-based data as well. Canadian users should have access to this system via the Internet, or through CADC.

HST Ground System Test

In late February, the HST was put through an extensive tes t (GST-5) of all functions . This test includes the distribution of the data acquired during the "observations" to the archival centres in Carching and Victoria . We must ensure that we can read the optical disks and build the catalog entries correc tly. A pres-"a , Ie deluge: we must be able to handle HST data at a rate of some 2 Cll/day.

HST Data Acquisitioll

We have been trying to determine the timing and cos ts of HST data acquisition. On the cost front , we have recently had the good ne\ys that ~RC's Space Division (still called that at the time of writing) has agreed to pay for the direct costs of HST data acquisition, within specified limits. The CADC Advisory Committee has recommended that we acquire the raw data as well as the calibrated data; in fact. the raw data was seen by some members as even more important than the calibrated data. which may become obsolete if the data are re-calibrated.

The latest word from STScl is that we will receive no data until a year after launch. We had expected not to receive any proprieta ry data uut il then in any case, and this new information m ay mean that STScl eX Jl ec t there to he little non-proprie tary, parallel mode data available d uring the first yea r. We arc wnt.iuuing to explore this with STScI.

Improve d l\' ctwork Access

DAO has now joined DCnet which , among o ther things, provides us with access to the US Internet (NSFnet , ARPAnet. etc). Users in Ontario. Quebec and Be who also have access to the Internet , using the TCP / IP COlnUlUll ications protocol, may reach us wi thout charge (and without costing us nny thiug eit.her!). To do this , try "telnet 128.189.150.6".

DAOPHOT Within IRAF

There has been keen interest iu work done by Dcunis Crabtree on installing Peter Stet­son 's popular DAOPHOT package withiu IRAF . This will be available as an add-on to t he next IRAF release, Version 2.S. which should come out in a month or 50 . The DAOPHOT add-on will be ava ilable a few months after the new InAF package is distributed.

The new version provides interacti\·e euhanccmcuts to t Ile orip;inal DAOPHOT, such as visualization tools for psf fitting and viewinp; the output data. Carol Christian of CFHT has been collaborat in)!; with Dcnuis in t.hi s \\"(a-l:. Fur furthe r information, pleas" check wi th Dennis.

10

New CADC Software

The present user interface will be redesigned soon. Some obsolete services will be deleted ; an example is FINDER, which is available in STSD.-\S now. New services will be added.

The Space Telescope - Europea n Coordinating f aci lity have developed a completely new version of STARCAT, which we expect to be installing soou . It provides seyeral new features, such as the capability of selecting all objects within a spec ified radius of a central position, and the output of ASCII fil es containing selec ted fie lds. The Europeau vers ion provides access to the EXOSAT and IUE Vilspa data bases as well , and we may include this facility too. It also removes the dependence on the Ornnib<lse commercia l database management package we now use, which requires use of the keypad land confuses a lmost e,·erybodyJ.

FROM THE DRAO USERS' C OMMITTEE

The DRAO Users ' Committee met in Pent icton on 17- 1S October la88. and was given an in-depth briefing of Observa tory activities. Following thi s ,·isit, a report was submitted to the Director of the Herzberg Institute of Astrophysics. What follows is summary of this annual report. ~'I embers of the committee are: Lorne ,h ery, Dill ~ !cCu tcheon , nick Perley, Serge Pineault (chairman for 19S5) and Tony Willi s.

SUM~!ARY - laSS ANl'iU.U nEP O nT

The DRAO users' committee is very pleased with the performance of the syn thesis radio telescope and the support given to the telescope and users by the staff of the Obser­,·atory. T he growing backlog of proposals to use thi s ins t.ru ment from astronomers both in Canada and abroad is further evidence of the importance of data fl~om this telescope to the international community of radio astronomers. T herefore the committee gives the highest priority and support for the Observatory 's projec t to upgrade th is instrument to a se\·en- antenna a rray. This upgrade will allow the telescope to produce data at t hree t imes it s current rate and will a llo\\" t he DnAO to continue to be a leading international radio ol)servatorj·.

However the committee h as two major concerns about the sit ua tion a t the DnAO . Firstly there is a crit ical shortage of s taff a t the Observatory just to support the telescope in its current form . The committee fears that this staff shortage may cause the project to upgrade the synthesis telescope to become delayed and miss the planned completion date in 1aaO. and will also make it w'ry difficult for the Observatory to maintain and support the completed telescope in an optimum fashion . Therefore the committee strongly sup;ges ts tha t the HI.-\ do everything poss ible to increase t.he size of the Observatory 's s tatf. A related problem is the size of the Observa tory 's operating budget, the amount of which the HIA has not made auy plan to iucrease after the se\·en- e1emcllt telescope is comple ted . Yet it is obvious that a te lescope which produces data at three t imes the rate of the current one will place large add itional demands on t he operat ing bud!!;et. ' Ve recommend that the H!:\ begin to plan an operat ing budge t which will a llow the DnAO to reali stically support t he completed synthesis radio telescope.

II

COMMENT DEVENIR MEMBRE DE L'ICAT INC.

L'institut canadien d 'astrophysique theorique a ete con~u comme un institut national qui serait accueilli par une universite "hate", mais sans en faire partie. Afin de preserver son caractere national et de mieux marquer la distinction entre l'ICAT et l'universite qui Ie re~oit, I' ICAT s'es t constitue en une societe portant Ie nom d ' Institut canadien d'astrophysique theorique-Canadian Institute for Theoretical Astrophysics. (Precisons que Revenu Canada a reconnu I' ICAT inc. comme organisme de charite, si bien que tous les dons sont deductibles d'impot).

La structure de l'ICAT inc. s'appuie fortement sur ses membres. En particulier , ceux­ci eli sent quatre des sept membres du Conseil de I'ICAT inc; ces quatre membres elus du Conseil doivent aussi et re membres de I'ICAT inc. Aucun reglement de l' ICAT inc. ne peut etre modi fie sans I'approbation des membres. De plus, nous utilisons notre liste de membres pour expedier notre bulletin d'information et pour annoncer les programmes, bourses postdoctorales, etc . qu'offre I' ICAT. Nous souhaitons que les membres de l'ICAT representent en gros l'ensemble des astrophysiciens theoriciens au Canada tout commc la SCA represente I'ensemble des astronomes.

Pour devenir membre, il faut remplir les conditions suivantes: (1) detenir un doctorat , decerne par une universite reconnue, dans Ie domaine de I'as tronomie ou de I'astrophysique, ou avoir acquis une experience equivalente au moyen de travaux de recherche qui relevent largement de I'astrophysique theorique; (2) etre employe it titre professionnel d 'une uni­versite ou d'un laboratoire de recherche et etre admissible aux subventions pour depenses courantes du CRSNG , ou occuper un poste equivalent dans un laboratoire de recherche du gouvernement canadien. ou etre citoyen canadien occupant une position equivalente it l'etranger; (3) et re membre en regie de la SCA. II n 'y a pas de cotisation.

Les premiers membres de I'ICAT inc. sont les membres du Comite de l'astrophysique theorique , au ler janvier 1986. On devient membre pour cinq ans . L'engagement des premiers membres se terminera donc en 19!J1. La liste des membres actuels se trouve ci-dessous.

Les nouveaux membres sont dus it I' Assemblee generale annuelle de la SCA en juin. Si vous desirez adherer it l'ICAT, veuillez en voyer votre curri culum vitae accompagne d 'une lettre affirmant que vous remplissez les conditions (1), (2) et (3) ci -dessus , all Dr . Scott Tremaine. CITA , McLennan Labs, University of Toronto , 60 St. George St. , Toronto, Ont o M5S lAI.

Si vous desirez demissionner comme membre, veuillez m 'en aviser par ecrit.

Nous souhaitons que tous les membres de la SCA qui sont admissibles et qui s 'interessent it I'astrophysique theorique se joignent it I' ICAT, pour que la contribution de nos membres reste aussi diversifiee et representative que possible.

Scott Tremaine, directeur

Ie ler fevrier , I !J89

12

MEMBERSHIP IN CITA, INC.

The Canadian Institute for Theoretical Astrophysics was conceived as a national in­stitute that would be hosted by- rather than a part of- an individual university. To help maintain CITA's national character di stinct from its host university, CITA has been incorporated under the name Canadian Institute for Theoretical Astrophysics- Institut canadien d'astrophysique theorique. (Incidentally, CITA, Inc. has charitable status with Revenue Canada so that all your contributions are tax-deductible.)

An important part of the structure of CITA. Inc. is its members. In particular , the members elect four of the seven members of the CITA Council ; the four elected Council members must also be members of CITA, Inc. ; and a ny changes in the by-laws of CITA , Inc. must be approved by the members . In addition, the membership list is the basis for mailing our newsletter and for announcements of CITA programs, postdoctoral fellowships, etc. It is also our hope that the CITA membership will be broadly representative of the community of theoretical astrophysicists in Canada, in much the same way that the CAS represents the community of astronomers.

The conditions for membership are: (1) members must hold a doctorate degree awarded by a recognized university for work related to astronomy or astrophysics, or else have equivalent experience, and their research should have a major component in the broad field of theoretical astrophysics; (2) members must be professionally engaged at a university or research laboratory and be eligible to hold an NSERC operating grant , or else be engaged in equivalent positions in Canadian Government Research Laboratories, or be a Canad ian citizen working abroad in an equivalent position; (3) members must be members in good standing of the CAS. There are no ducs.

The original membership of CITA, Inc. is the membership of the Committee on The­oretical Astrophysics of the CAS as of January 1, 1!J86. Membership is for five years , and thus the original memberships will expi re in 1991. The current membership li st is given below.

New members are elected at the Annual General Meeting, which is planned to occur during the CAS meeting in June. If you would like to join , please send a curriculum vitae plus a covering letter stating that you fulfil conditions (1), (2), and (3) above , to: Dr. Scott Tremaine. CITA, McLennan Labs, University of Toronto, 60 St . George St., Toronto M5S lAl , Ontario.

If you would like to withdraw from membership, please send me a written notice of resigna tion.

We hope that all eligible CAS members with an interest in theoretical astrophysics will continue to join so that the input from our membership remains as broadly-based and representative as possible.

Scott Tremaine. Director

February 1, 1989

13

i\IE IVIBERSHIP OF CITA, IN C.

M. Alexander (Guelph) P. Andersen (PIn-s ics Toda,') J. Auman (UJcj , P. Barker (\\ 'es tern ) R. Bond (C ITA ) E. Borra (Laval) R. Carlberg ( U. of T. ) W. Chau (Queen 's) M. Clement (D. of T .) M. Clu t ton-Brock (r-- Ianitoba ) M. Duncan (Santa Cruz ) K. Dunn (D alhousie) C . Dyer ( U. of T .) G. Fahlman (UBC) P. Feldman (HIA ) M. Fich (Wa terloo) E . Glass (Windsor ) J . Griffith (La kehead) D. Hartwick ( Victoria) R. Henriksen (Queen 's) 1\ . Innanen (York ) W . Israel (Alberta) N. Kaiser (C ITA )

S. I\wok (Calgary) K. Lake (Queen 's) D. Leahy (Calga ry) !I I. ~ I a rlborou !\h ( \ \ '"stern ) P. ~ I artin (CIT,\ ) R. l\l cLenaghan (Waterloo) R. ~Iitalas (Western) G. ~Iitchell (St. ~ I ary's) J. ~ Ioffat (C . of T .) L. l\elson (CITA ) S. Pineault (Laval) J. Poll (Guelph) R. Pudritz (~I cl\"[as ter ) C. Rogers (U. of T .) \Y. Shuter (l ' BC) S. Sreeni" asan (Calga ry) P. Sutherland (McMas ter) S. Tremaine (CITA ) B. Tupper (:<ew .Brunswick) D. \ 'a ndenIJerg (Victor ia) S. "an den IJergh (D,\O) Y . \'arshni (Ottawa)

SMALL GRANT HOLDER'S REPORT

J .L. Climenhaga

Fi rs t let me t hank CASCA for awarding me a $500 grant which , a long with a grant from t he Uni" ersity of Victori a , made it possible for Dr. J an Smolinski to come to \ ' iewria from 1I lolltrea l to spend a few weeks working wi th me and Murray Fletcher.

Dr. Smolinski , of the Copernicus Astronomical Center , Labora tory of Astroph)' sics a t Torun , Poland, came to Canada to attend the J..\ .U. Culloquium No. 113 on "Ph)'sics of Luminous IJIue Variables" held a t Val Morin , Quebec in August 1988, and to present a joint paper with !l lunay Flet cher a nd me on "Mass Ejec tions from the G-T)'pe Hypergiant HIl 8752". \Vhile he was in Victori a, we completed the paper for publication in t.he P roceed ings of t he Colloqui um . and al so worked on materi a l (which included some recent spcc{.)"ograms) for a subsequent paper on thi s same sta r .

Since l OGO we have made obsen 'ations of HIl 8752 !HD 217-17G) , a G-type sup, 'rgiant which is one of the lllos t huni nous stars. During this t ilne va rions challges have ()l'c llrr C'd in its spectnnn. which are described in the paper to be published in the Colloquium P roceedi ngs . \\'e ill terprct these changes to be the result of mass ejections from the s ta r and of t he existence of an expanding circumstcl la r envelope. T he results are in ag reement with the model pmposcd by us. (see 1086, Symposiulll on Lumino ll s St ars and Assoc iations in Galaxies . cd. C.W .H. De Lome, .'1. .. 1. Willi s. P. Laskarides, SO), sugges ting t ha t. 1111 87:i2 is a binary SystCli l with a JH'ri od of 620 days, cont ained in a COllllllon expa nding cll\'C'lope and surrounded by an HI! res in" .

14

BUMPS AND WIGGLES IN BALTIMORE

Douglas R. Gies

Multiwavelength observational campaigns on selected targets can take much effort and t ime to organize, but a n even greatcr task is to asscmble the results from the d ifferent investigators into SOllle sor t of coherent pict lll"e. The 1..\. U. ~ I cel i ng in Balt imore this pas t August provided the venue for the participams in a recent such campaign to gather and compare prelimina.ry results on rapid variability in Be s tars.

Be stars are rapidly rotating hot st a rs with well-developed di sk-shaped circumstellar envelopes . The formation of the envelope is clearly related to the rapid rotation of the s ta r but rotation alone cannot be the sole cause since most Be stars have rot ation speeds well below the break-up velocity. There is now a growing body of evidence that mass ejection into the disk is related to photospheri c nonradial pulsations. These pulsations are observed in subtle photospheric variations and in absorption fea tures ( "bumps and wiggles" ). Cana­dians have been at the frontier of this a rea of research ; J ohn Percy (Toronto) has assembled perhaps the la rgest da ta base on Be-s ta r pho tometric vari ab ility, and Gordon Walker and crew (UBC) discovered the firs t case of the sys tematic line profile vari a tions in the sta r ( Oph.

The goals of this campaign were twofold: first to search for evidence of rapid vari ability in both the optical and ultraviolet to se ttle the issue of whether the vari ations are caused by temperature or surface velocity fiuctua t ions, and sccolld, to look for any connection between the pulsations and ejec tion of materi a l into the ci rcumstella r envelope. Two campaigns were conducted in 19S7 on the Be s ta rs ° And (August ), .\ Eri and w Ori (November) . The program included observat ions by the Voyager spacecraft in t he fa r UV (Polidan , U. of Arizona) , low a nd high dispersion UV spectroscopy with lUE (Peters, U. Southern California), and spect roscopic, photometri c and polarimetric observa tions in the optical region of the spectrum . Once aplin Canad ians were key players, with J ohn Percy organizing photomet ri c co""ragc alld Grant Hill and Jaymie Matthews (UBC) making spec troscopic observations. Il ly contribution w,t>' a ser ies of high~ resolution spectra made with the McDonald Observatory Octi con , an ar ray of eight ret icon detectors which produces high signal-to-noise spec tra o,'er a wide range of the op t ical spectrum.

The primary result from our meeting ill Baltimore was tha t apparently both equipment and weather were favourable during the fe w J ays centered on the UV observations, and we now have an exce llent set of multi spectra l da ta on these three s tars. Periodic flu x variations were found fo r both ° :\ lld a nd .\ Er i, and WOl"k is continuing on the question of colour variability. T he spec troscopic \"nriations seen in both the UV and op tica l were striking and complex, and interpre ting the spec tra will require a careful separation of the photospheri c and circums tellar com ponents. \Ve anticipa te tha t our complete analys is will appear in a se t of back-to-back papers in the As trono m ical J uurnal some time next year.

This meeting was as impor tant s tep fo rward for the widespread group of observers involved in thi s campaign , and it was especia ll y "njoyablc mixed with many other reports presented a t the Geneeral Assembly (see Sky "nd Tdescope, October 1988 issue). I am grateful to CASCA for fi nancia l support in the fort ll of a Small Grant to at tend thi s gathering in Baltimol"t.!.

15

REQUEST FOR ILLUSTRATION MATERIAL FOR THE SECOND EDITION OF "L 'ASTRONOMIE ET SON HISTOIRE"

:-Iy book "L'ASTRO:\Qi\lIE ET SON HISTOIftE", published in 1982, had a second printing in December 1DSi. Except for some minor correc tions. no change of mnjor im· portance was made. .-\s tronomy has moved a lo t since the early eighties, espec iitlly in the fields of the evolution of massive stars, interstellar medium physics and extragalacti c astronomy; there has also been implementation of major new instruments and techniques .

. I always felt that I should produce a second edition when the Hubble Space Telescope would have produced its fir st results. Over the years . this date was pushed into the future continuously, but in this first semester of 1DS9. the launchIng date looks closer than ever. I have started preparing this second edition of my book.

I need new fi gures . new illustrations, new photographs of general interest. I would like material which is not commonly found in other tex tbooks. I also desperately wish to have material ob ta ined by Canadian astronomers. In my fir st edition I could not even obta in a decent photograph of the CFHT, whi1e I was getting excellent material from American observatories, from European institutions and from the Soviet! (I must however. make an exception for A. nat ten who provided me· with superb photographs dealing with the history of D.A.O.) I wish a better harvest this time. and this note is a request for Figures and Photographs of material that you consider of general interest and that you might wish to see outside the professional journals. I will take care of getting all the permiss ions for copyrights, and as in the fir st edition of the book the sources will be clearly stated.

Jean-Rene Roy

CASCA JOURNALS PROGRAMME

It is time to gi" e members a more detailecl report about progress in the Society's effort to distribute their unwanted journals and books to libraries, where they can be used by astronomers who might not otherwise have access to them . n y presenting thi s accoun t in the Spring· Equinox issue of Cassiopeia. we hope that it will also serve as a report to Council of our act i"ities O il its behalf.

The programme has received some publicity a t the I.A.U. General Assembly and asso· ciated mee tings, and through I.A .U. publications. \\'e lUlYe recei"ed complimellts on our initiative as well as requests for material. Up to the present , defin ite requests ha" e come from Argentina, nulga ria. Egypt , India (3), I\'igeria and Poland . The materi a l for Ar­gentina was sent from Victoria «nd is on its way. Tha t fo r nulgaria has been handed 0\'1: 1'

in Toronto and is awa iting whatever arrangements the nulgarians themselves wi ll make for shipmem . The Poles h""e received their consignment from Toronto and have thanked us for it . Shipping of supplies to India is temporarily delayed by the Indian governmellt 's own requirement for import permits. \Vork has begun on preparing the Egyptian shipmell t and will begin soon on that for Nigeria. Even before anything has been sent we have had a formal letter of thanks from the Deputy Vice· Chancellor of the University of Nigeria · testimony to the value placed on these gifts by the recipients .

So far . most recipients have not been !,;reatly concerned to have their journals hound and we have not spent much of the Society 'S money. On the other hand , ship ping cos ts, which are apprec iable. are sometimes a problem. It Illay be that the Society can best help by subsidising the sh ipping rather than the billdill!!;. Indi vidual members who ill'e eithf' r unwillillg or ullah le to !,:i'"e their old journals might like to support the prograllllne I»), givi ng money to the Society that would be spec ifically for this W01'k.

16

The narrowes t bottleneck is our own time. It is time-consuming to prepare a sllipmellt , especially when formalities like import permits are involved. \\'e are each aware that we are coping only rather slowly with the reques ts that we have received. If the prograIllme is to be cont inued . we should illvolve more people. Perhaps dOllors could ship t heir own journals direc tly, once "'e have identified recipients, clailning the sh ipping charf\ l's ha ck from the Society if they so wish. Allo ther solution lllight be to have representatin·s 0 11

our group from different parts of the country so that we could dr«w on potenti<ll donors in other centres than Toronto and Victoria.

\\le have little doubt that the programme is contributinl!; to the meeting of a re<l lneed. The demand is slow but steady. \\'e will welcome further gifts of material from members. Do not try to send them to either of us now, but please let one or the other of li S know what you are prepared to give.

"Ve can continue to run this programme exclusively through CASCA if we wish. but there are other possibilities. The Third World Academy of Sciences , with headquarters in Trieste, h as a large journals and books programme, and would welcome our contri b ution. They h",'e resources we do not have that enable them to assess the genuineness of lleed. They match the inquiries with the offers and sometimes help with the shipping cos ts. The disad"antages of joining would be the loss of the specific C.-\SCA (or even C,1l1adian) identity and of the personal contacts that a small operation can enjoy. A third . at the moment somewhat hypothetical possibility, is to join with other Canadian societi es doing similar things in other disciplines. We would appreciate some expressions of opinion from both Council and individual members a bout developing our programme along one o r o ther of these lilles . Finally, we append the text of one of the letters of thanks that we have received.

A.H . n atten D.\". nrueckner

From the Astronomical Obsermtory of the Warsaw University (original dated January 13, 19S9)

Dear 1\'11'. I3rueckner ,

I have been illfurmed by prof. S. Rucinski about your considerab le help in the it c tion of sending us the astronomical material lacking in our library. The books passed to us. being selec tecl so competently, m«ke a "cry valuable contribution to our book collection . Let me express our deep grati tude for thi s and the true appreciation of your disinteres ted personal efforts. Let me also send to your address our sincere thanks to a ll from the Canadian Astronomical Society who participated in this initiative and act ion. It really happens on ly "ery rarely that the help COllles so fa s t and is so much adequate to the neecls.

Please find enclosed the confirmed lis t of publicat ions we recei" ed - perhaps it "' ill be somehow usefull for the contributors.

Very sincerely yonrs

~ l artin I\ubiak Direc tor

17

RESEARCH OPPORTUNITIES IN ASTRONOMY/ASTROPHYSICS

UNIVERSITY OF VICTORIA

The Department of Physics and Astronomy at the University of Victoria invites appli­cations for the following positions to commence as soon as possible after July 1, 1989.

1. Research Associate in the area of theoretical stellar astrophysics . The applicant should have at least two years of post-doctoral research experience, preferably involving the computation of model stars. The opportunity will exist to participate in on-going projects with D.A. VandenBerg. The position will be for a fixed term of two years and the salary will be commensurate with experience, with a minimum of $27,000 per annum. There will also be an opportunity to teach one undergraduate or graduate course in Astronomy (for an additional stipend).

2. Postdoctoral Fellows in the areas of stellar astrophysics and/or stellar populations. Depending on the availability of funds, up to two positions will be filled. Preference will be given to those whose interests are primarily theoretical or interpretive and who would be willing to participate in collaborations with one or more of D.A. VandenBerg, F.D.A. Hartwick, and C.J . Pritchet. The appointments will be for two years, with the possibility of renewal for a third year. The salary will be at the level set by the Natural Sciences and Engineering Research Council of Canada (presently $24,000 per annum, but under review).

3. Research Assistant/Sun 4 Manager. The applicant should have at least a B .Sc. in Physics or Astronomy (or extensive experience), knowledge of UNIX, and expertise in developing and using astronomical software packages. The position, which is contingent upon expected funding, is primarily to assist C .J. Pritchet with his on-going research and, at the rate of approximately 10 hrs/week, to manage the Astronomy Group 's Sun 4 computer. The salary will be commensurate with experience, with a minimum of $24,000 per annum.

The University of Victoria has excellent research facilities, particularly as regards com­puting and image processing, and ready access to the resources of the nearby Dominion Astrophysical Observatory. Interested persons should send a curriculum vitae, a statement of research interests, and the names and telephone numbers of three references to D.A. VandenBerg, Dept. of Physics and Astronomy, University of Victoria, P.O. Box 1700, Victoria, B.C . V8W 2Y2, Canada.

Applications will be accepted until April 30, 1989.

In accordance with immigration regulations, this advertisement is directed in the first instance to Canadian citizens and permanent residents, but all qualified candidates are encouraged to apply.

UNIVERSITY OF TORONTO

Erindale Campus Department of Astronomy

18

We invite applications for a faculty position at the rank of Assistant Professor. The position is contractually- limited (initial appointment two years, renewable for an additional three years), but the incumbent is eligible to apply for any tenure-stream position which might subsequently arise.

Qualifications include research ability and achievement in any area of astronomy/astrophysics, and effective teaching ability.

Duties include undergraduate teaching on the Erindale Campus, graduate supervision and teaching (subject to circumstances), and research.

The starting date is Sept. 1, 1989 (preferred) or Jan. 1, 1990 (possible) .

Please submit application, curriculum vitae, statement of research interests, and names of three referees, by June 1, 1989, to:

Professor John R. Percy Division of Sciences Erindale Campus University of Toronto Mississauga, Ontario Canada L5L lC6

Erindale Campus is attractively situated on the Credit River in Mississauga, 25 kID west of the centre of Toronto. It has a strong Division of Sciences, dedicated to excellence in teaching and research.

The University Department of Astronomy includes 19 faculty members and 25 graduate students. They have access to a variety of departmental, national and international facilities for observational work, to abundant computing power provided by both departmental and university computers including a Cray X- MP, and to one of the best astronomical libraries in the world. The department also has close links with the Canadian Institute for Theoretical Astrophysics, a national institute hosted by the University.

In accordance with Canadian immigration regUlations, first priority will be given to Canadian citizens and landed immigrants . Both female and male candidates are e ncourage d to apply .

21

Kwok, Sun; Hrivnak, Bruce J. Unidentified infrared features in proto-planetary ne bulae. U Calgary. 27 Jan 89

Leonard, Peter J.T . S t e lla r c o ll is i o ns i n globular clusters and the blue straggler pro blem. DDO/ U o f T . 4 Jan 89

Martin, Peter; Rouleau, F . EUV o pacity with interstellar dust. DDO/U of T. 19 Jan 89

McClure, R.D. The role of binarity in the evolution of peculiar red giants. DAO . 28 Feb 89

McLaren, Robert . Recent developme nts a t CFHT. CFHT. 27 Jan 89

Neff, S.G.; Hutchings , J . B.; Gower, Ann C. Evolution of radio quasars for Z < 2. DAO . 28 Fe b 89

Pudritz, Ralph E. Gas dynamics in the galactic centre: gravity vs. magnetism . Mc Master . 16 Feb 1989

Pudritz, Ralph E. Star formation in accretion disks. McMaster. 16 Feb 1989

Pudritz, Ralph E.; Silk, Joseph . The origin of magnetic fields and primordial s tars in proto gala xies. NcMaster. 16 Feb 1989

Racine, Rene . Atmosphe ric a nd facility s eeing on Mauna Kea, Hawaii. U Montreal. 1 9 Jan 89

Ratnatunga, Ka ven; Van den Bergh, Sidn e y. The rate of stellar collapses in the g a l axy . DAO . 16 Jan 89

Romal o, D.N.; e t al. An interfe r e nce monito r with real-time FFT spectral a nalysis t o r a radio o b s erva t o ry. DRAO . 28 Feb 89

Seaquist, E.R . ; Bode, M.F . ; Frail , D.A . ; Roberts , J.A.; Evans, A. ; Albinson, J.S . A de taile d study o f the r e mnant o f nova GK Persei and its enviro n s . DDO/ U o f T. 20 Fe b 89

Smith , Graeme H. ; Bel l, Roge r fl .; Hesser, Jame s E. CN and CH variations a mo ng s ubg ian ts in the globular cluster . DAO . 16 J an 89

22

Stetson, Peter B.; et al . CCD photometry of the anamolous globular cluster Palomat 12. DAO. 16 Jan 89

Takada-Hidai, Masahide; Aikman, G.C.L. H alpha line in 36 Lyncis. Reticon observations of line variability. DAO. 6 March 89

van den Bergh, Sidney. The cosmic distance sca le. DAO . 6 March 89

Van den Bergh, Sidney. Life and death in the inner solar system . DAO. 16 Jan 89

Van den Bergh, Sidney; Pri t chet , C.J . The Crab Synchrotron Nebula at 0.5 arc sec resolution. DAO. 16 Jan 89

Zhan, Yin; Dyer, Charles C. An integral constraint on the N-point correlation function of galaxies. DDO/ U o f T . 25 Jan 89

B. OTHER PUBLICATIONS

The extragalactic distance s cale / e dited by Sidney van den Bergh and Christopher J. Pritchet. San Francisco, Calif. : Astronomical Society of the Pacific, c1988. (ASP Conference Series Vol. 4)

CADC IRAF WORKSHOP

The CADC will be presenting an IRAF Workshop at the June CASCA Meeting. The worksho p will be held on Sunday and Mo nday the 25 - 26 of June at the Univers ite de Mo ntreal.

The topics presented at the works hop will range from introductory material to some mo r e advanc ed sessions. In o rder t o help us present the material whic h will be mos t u s eful t o c urre nt and potential IRAF users we would like you t o complete the que stionnaire on the back cover of this issue, ranking the t o pics in order o f importance to you . Please mark '1' for the mo st important topic and the n increasing numbers for topics which are of less interest. Also please pass a copy of this on to your associate s if the y did not receive o ne .

Please send your replies to:

Dennis Crabtree, DAO, 5071 W. Saanich Rd . , Victoria, B.C . V8X 4N6

c bt@dao.nrc . ca (I n ternet) crabtree@nrcdao (Bi t ne t)

23

CADC IRAS WORKSHOP QUESTIONNAIRE

Name

Address

Phone E-mail

I will definitely be attending the workshop __ _

I am thinking of attending the workshop? __ _

I will definitely not be attending the workshop.

Please rank the topics you would like to see discussed:

How IRAF works Using the Command Language Writing command procedures and packages IRAF Management SPP programming Guide to the applications Discussion of the DATAIO, PLOT and IMAGES packages The APPHOT/ DAOPHOT package The CCDRED package The ONEDSPEC package The APEXTRACT package The LONGSLIT package Gripe and Q&A session

What is your level of expertise?

Never used IRAF Can use a few applications by rote Am familiar with IRAF basics

What format do you favor?

Lectures Lectures plus demonstrations Lectures plus hands-on time Demonstrations

(Note that facilities may not permit demonstrations with a large group)

Please send your replies to:

Dennis Crabtree, DAO, 5071 West Saanich Road, Victoria, B.C. V8X 4M6

cbt@dao.nrc . ca (Internet) crabtree@nrcdao (Bitnet)