3531N 84 - 23 4 16

WIDC-A-R&SNational Space Science Data Center/

World Data Center A For Rocketj and Satellite*83-19

Documentation for the Machine-Readable Version

of the

CATALOGUE OF 20457 STAR POSITIONS OBTAINED BY PHOTOGRAPHY IN THE

DECLINATION ZONE -48° TO -54° (1950)

(EICHHORN, GOOGE, LIIKAC AND MURPHY 1983)

December 1983

https://ntrs.nasa.gov/search.jsp?R=19840015348 2020-01-12T09:13:34+00:00Z

NSSDC/WDC-A-R&S 83-19

DOCUMENTATION FOR THE MACHINE-READABLE VERSION

OF THE

CATALOGUE OF 20457 STAR POSITIONS OBTAINED By PHOTOGRAPHY .I/V THE

DECLINATION ZONE -48° TO -54° (1950)

(EICHHORN, GOOGE, LtlKAC AND MURPHY 1983)

Wayne H. Warren Jr.

December 1983

National Space Science Data Center (NSSDC)/World Data Center A for Rockets and Satellites (WDC-A-R&S)

National Aeronautics and Space Administration

Goddard Space Flight CenterGreenbelt, Maryland 20771

DOCUMENTATION FOR THE MACHINE-READABLE VERSIONi

OF THE

CATALOGUE OF 20457 STAR POSITIONS OBTAINED BY PHOTOGRAPHY I,V THE

DECLINATION ZONE -43° TO -54° (1950)

(EICHHORN, GOOGE, LUKAC AND MURPHY 1983)

ABSTRACT

A detailed description of the machine-readable catalog, as it is currently be-ing distributed from the Astronomical Data Center, is given. Some minor re-formatting of the magnetic tape version received from the first author wasdone in order to decrease the record size and conserve space; the data contentis identical to the sample shown in Table VI of the source reference (^ichhornet al. 1983, Astron. J. 88, 546).

iii

TABLE OF CONTENTS

Section 1 - INTRODUCTION AND SOURCE REFERENCE 1-1Section 2 - TAPE CONTENTS 2-1Section 3 - TAPE CHARACTERISTICS 3-1Section 4 - REMARKS, MODIFICATIONS, ACKNOWLEGMENT AND REFERENCES .... 4-1Section 5 - SAMPLE LISTING 5-1

LIST-OF TABLES

Table

1 Tape Contents . 2-12 Tape Characteristics ......; 3-1

SECTION 1 - INTRODUCTION AND SOURCE REFERENCE

The Catalogue of 20457 Star Positions Obtained by Photography in the DeclinationZone -48° to -54° (1950) (Eichhorn et al. 1983), hereinafter referred to as the"Sydney Photographic Catalogue -48° to -54°" or "SPC", gives position estimatesdetermined by the plate overlap method (cf. Eichhorn 1960) from plates taken atthe Sydney Observatory in 1964. The catalog was originally planned to fill partof the gap left by the Yale Zone and Cape Photogaphic Catalogues, although thegap has in the meantime been closed by catalogs prepared at Sydney Observatory(see Nicholson 1979; King and Lomb 19£3).

This document describes the machine-readable version of the catalog as it iscurrently being distributed from the Astronomical Data Center. It is intendedto enable users to read and process the data without problems or guesswork.Additional details concerning the plate material and measurement, referencepositions, reductions, elimination of magnitude-dependent aberrations, determi-nation of final positions, and comparison with the FK4 system can be found inthe source reference. A copy of this document should be distributed with anysecondary copy of the machine-readable catalog originating from the AstronomicalData Center.

SOURCE REFERENCE

Eichhorn, H., Googe, w. D., Lukac, C. F. and Murphy, J. K. 1983, Astron. J. 88,546.

1-1

SECTION 2 - TAPE CONTENTS

A byte-by-byte description of the contents of the SPC is given in Table 1. Thesuggested format specifications apply to FORTRAN formatted read statements andcan be modified depending upon individual programming and processing require-ments. Default (null) values are always blanks for data fields read with acharacter (A) format. If no default value is given for a numerical field, thatfield has been found to always contain valid data. Alternate format specifi-cations are given in parentheses.

Table 1. Tape Contents. Sydney Photographic Catalogue -48° to -54°.

Suggested DefaultByte(s) Units Format Value Description

1- 9 A9 (9A1 ) . Number in the Cape Photographic Durchmus-terung (Gill and Kapteyn 1897, 1900). Thezone sign (always -) is in byte 1, the zonein bytes 2-3, byte 4 is blank, and the num-ber is in bytes 5-9. The identificationsare not complete, i.e. existing CPO numbersare not always present.

10 1X Blank

11-13 A3 Source catalog identification, as follows:

A Gill and Houqh (1923)B Jackson and Stoy (1955)

1-120 Plates in Cape AC zone -49°121-240 Plates in Cape AC zone -51°

(Cape 1913-1926)241-360 Plates in Sydney AC zone -53°

(Sydney Obs. 1923-1933; see Wood1971)

where each AC zone is covered by 120 platesand 120 or 240 is subtracted to obtainplate numbers in the -51° and -53°.zones,respectively.

14 1X Blank

15-19 15 Star or plate number in the source catalogindicated in bytes 11-13.

20 A1 An asterisk (*) if the star served as areference star.

21 1X Blank

2-1

Table 1. (Continued)

Byte(s)

22-23

24

25-26

27

28-32

33

34

35-36

37

38-39

40

41-44

45

46-49

SuggestedUnits Format

hours I 2

1X

min 12

1X

sec F5.2

1X

A1

0 12

IX

12

1 X

F4.1

1X

mag F4.1

DefaultValue Description

— Right ascension (a) for the mean coordinatesystem 1950, ostensibly on the system of theFK4, at the average epoch 1964.475 of allplates which provided data. (If hicjheraccuracy epochs are required, Table I ofEichhorn et al. 1983 should he consulted. )

Blank _

a

Blank

a

Blank

Sign of declination (6) for the mean coor-dinate system 1950 (see description forbytes 22-23) .

6

Blank

6

Blank

6

Blank

blank Photovisual magnitude, taken from existing

50

51

1X

11

sources. (For AC stars, the magnitudeswere computed from data given in the AC andare photographic.) Magnitudes are neitherprecise nor accurate and are given forreference purposes only.

Blank

Number of measured central images contrib-uting to the calculation of the publishedposition.

2-2

Table 1. (Concluded)

Suggested DefaultByte(s) Units Format Value Description

52 1X Blank

53 —- 11 blank Number of pairs of diffraction spectra con-tributing to the calculation of the publishedposition. The number of individual imagesmeasured for computing a published positionis the number in byte 51 plus twice the num-ber in byte 53 (see Kichhorn_et aZ. 1983).

2-3

SECTION 3 - TAPE CHARACTERISTICS

The information contained in Table 2 is sufficient for a user to describe theindigenous characteristics of the machine-readable Sydney Photographic Catalogue toa computer. Information easily varied from installation to installation, such asblock size (physical record length), blocking factor (number of logical records perphysical record), total number of blocks, tape density, and internal coding(EBCDIC, ASCII, etc.) is not included. This information should always be suppliedif secondary copies are transmitted to other users or installations.

Table 2. Tape Characteristics. Sydney Photographic Catalogue -48° to -54°.

NUMBER OF FILES 1

LOGICAL RECORD LENGTH (BYTES) S3

RECORD FORMAT PR

TOTAL NUMBER OF LOGICAL RECORDS ; 20457

Fixed block length (last block may be short)

3-1

SECTION 4 - REMARKS, MODIFICATIONS, ACKNOWLEDGMENT AND REFERENCES

The machine-readable version of the SPC was received on magnetic tape fromH. Eichhorn in February 1982. As received, the file consisted of 104-byterecords with bytes 1-25 blank and many other blanks throughout the records.The records on this tape had been designed specifically for printing thecatalog and microfiching rather than for efficient storage and computing. Toincrease storage efficiency the following modifications were made after checkingwith the first author to be certain that the changes would he acceptable.

1. Superfluous blanks were removed from throughout the data records,except for a single separator blank between each of the data fields; thusthe logical record length was decreased from 104 to 53 bytes.

2. Preceding zeros were added to all right ascension and declinationfields.

ACKNOWLEDGMENT

Appreciation is expressed to Dr. H. Eichhorn for providing the SPC on tape andfor reviewing and commenting on a draft copy of this document.

REFERENCES

Cape of Good Hope 1913-1926, Cape Astrographic Zones, Catalogue of RectangularCoordinates and Diameters of Star Images, Zones -41° to -51° (Royal Observa-tory, Cape of Good Hope), Vols. 2 (-49°) and 11 (-51°).

Eichhorn, H. 1960, Astron. fJachr. 285, 233.

Eichhorn, H., Googe, W. D., Lukac, C. F. and Murphy, J. K. 1983, Astron. J. 88,546.

Gill, D. and Hough, S. S. 1923, Zone Catalogue of 20,843 Stars, Equinox 1900...Royal Obs., Cape of Good Hope (London: H. M. Stationery Office).

Gill, D. and Kapteyn, J. C. 1897, Cape Photographic Durchmusterung, Zones -33°to -52°, Ann. Cape Observatory ±, Part II.

Gill, D. and Kapteyn, J. C. 1900, Cape Photographic Ourchmusterung, Zones -53°to -59°, Ann. Cape Observatory ^, Part III.

Jackson, J. and Stoy, R. H. 1955, Cape Photographic Catalogue for 1950.0. Zone-52° to -56° (London: H. M. Stationery Office).

King, D. S. and Lomb, N. R. 1983, Sydney Southern Star Catalogue, preprint.

Nicholson, W. 1979, in IAU Colloquium 43, Modern Astrometry, edited by F. V.Prochazka and R. H. Tucker (Vienna: University Observatory), p. 515.

4-1

Sydney Observatory 1923-1933, Astrographic Catalogue 1900.0, Sydney Section,Dec. -51° to -65°, Vols. I-XII, DEC -51° to -55°, Plate Centres DEC. -52°,-54° (Sydney: Alfred James Kent, Government Printer).

Wood, H. 1971, Astrographic Catalogue 1900.0, Sydney Section.- Dec. -51° to -65°Vol. LIII Explanation (Sydney: Sydney Observatory).

4-2

SECTION 5 - SAMPLE LISTING

The sample listing given on the following pages contains logical data recordsexactly as they are recorded on the tape. Groups of records from the beginningand end of each file of the catalog are illustrated. The beginning of eachrecord and bytes within the record are indicated by the column heading indexacross the top of each page (digits read vertically).

5-1

OSJ-or^3,03J10»

-3.-1-a-'N3«-33<J\3>cncocnr»-cnocnmw»Jl-1* •!

oo-o n

,"O3

r—33

t- o

r-»r»-i

f—

ooo

-o.-lvOfN•-O—vOOLICKin=otnr--no

J

»

<

c-t

7)

'-

j

-.3

• •*

5™

*»

•3-3

5 SS

O ^^

O -"l«-

•j) fNr>

"-i t-i 5- rM^ca *- fM i

=•* *— 3 rNfNU IN PI 3 fN«-•3 -1 n ;j .-N.3-3 a "01-•- -m jj

*-.o

A) </) K) 3 aa »-:»

Z O i. SB -) •-»-:j M 3 «-o

-d a ,-q »j > j>-) .5 CU COH f a H r*•*• r« a = jj

^ '.j ^ 1-1••< .3 fN

ri rM* fN 3 rn fN O? ^

in 3 in 'fi co r» . r ui** 3- *" in. 3 *;'uv in~ri 3 *™ ^ ^ fl '^ -3

en ^ ^ 3 *™ ' in ^

°

1 1 1 1 1 1 1 "l

r - m c n a a f N 3 3 ' -3 ^ 3 ^ ^ ^ i n f * i

co o ' >^ ^ in t^ f^ r^3 * - f N f N f N ^ 3 i n

3 3 3 3 3 3 3 3

3 3 3 3 3 3 O O3 3 3 3 3 3 3 3

^~ ui \o in r^ 3' r* 3r>- p- r - r*- r- 33 r-

IN rt rM fM ^ fN 'i— fN t- •- fN *~

^ oorM m

<N flin ini i

* — r M m ; * i n i o r * a 3

fN

.,

r-

mi

33

3

3

33

fN

20 ^h

— CO

I J!j> int i

m co3 "

Q 3

3 33 3

*~ (N

CTI r** fNfN *fN 3

fN 3•fl Li

<-> »-

3 »•

•- .1

» 3

m ini i

m a

3 3

3 33 3

» m

-3 3(O in^n rs3 fN

fl r4

l l

fM P"l

r»_

m

m

nin

S

3

0

*•o

Li

rj

fN

l

OH t- IN O> fN

fN . 1 fN CO ^

in cr* 3 -* rN

in d> ^ ID n.-»! 3 "I

* ^ in in in1 i i l l

•^ ^ -n >o ^

•» m 3 r- —

3 3 3 3 3

3 3 3 3 33 3 3 3 3

^ P^ P* Cn ^

fN .N

Li 3LI 01co in

i iin •& r^ m rn

fN fN .0

^ O -^

fN JJ —i- 3 •-

en fN »-

in m »1 1 I

m r~ NPM » 3

r- «- m

3 3 3

3 3 33 3 3

in m 3

^ -"»PM fN

03Li

co

i

O «- PMr-j f\i PM

»- 3 fN

fji ^~ inin a 01<Ji PM 3

<*1 ". *

in LI mi i ia 23 a3 -O fM

5 S ?!3 3 3

O 3 33 3 0

IN pn r»

fN

«- fNn

0

LI Li1 1

01 ^ iTirj rM fM

fM 3 3 — f|

x .0 ^~ P*- r*J^ CN ^ ol •—

vO r» -j> 3 r»

in in in in ^i i i i l

.- rt .N .N -0co 3 ;» r* cfn

u1 0 0 " —

3 3 3 3 3

3 CS 3 3 33 3 3 O 3

C* * .N tf> 0IN fN ^ 'J>

IN r- fM

Li ui1 1

o r^ *n cn 3.N fN .N -N -1

Q o a a03 09 03 OSn o o n

a ace ato o

U U U U rj U U U

a a e a c a ' j a a s j a a

U CJ D U L> U U D

5-2

O'_)

o a a raa a ca ca

U (J tj U

QPS

oX

—*-»——n——rg

— 3CO

— org— 3—

33 r»3 3•a .1a*331O N

CO—333t-cnr-33

r—nt-rg

r-3•O7>•OCO

-O3men-103•.nr»•.no

•J O- t-<

=~ 3)'J rg— :3-"3 O*** fNj

1 V>

"1Q.«P

'•••3

•J

•J

-1:jH

hj

**!--»

™~-4

-•J

%"J

—9

QUSo•J-l].fl

?r23'-?

i

3333

3333

3341

*41

JU

3U

5t>

78

90

U;

rgairgco

rgorg._i

— rgno -g.-N3 rg*—!J rg3Q —on< —33

— O— Liaa — 3>

"j —iv> — rg

-J — —O —3> ^

•JH r-3 Oa. .13 3fM n

rg

—

O

zz,-Ms<

ZJQC-4

-940

O 5J3!

U3-*

n

n

rg

i•,11i3

33

co•si

.1rgit

3

jj

m

oo••or_

n

i

33r J:j>3rg

Qeg

O

•-a

,-s,

•Jl

in

"i-n33

33

co

n7g

3

—in

33

OOino

—nmi

enrg

0rg

Q

a

(J

a

— CO

LI rg

3> 33 .1rg nn »

.n 3in ini i

33 —3» in— eno —03 COm »n

n nrg rg

*in in*~3rg

3 <:on

•«»0org«_

—.-1

1

-} „.

n n3? s3 3rg -g

O On oso oCJ '_)Ci) CO

03 ce

—nn

rg

3LI

1

3

!-4rg

COm

n(N

50n

3

J*g

rgn^rg

Q

OSf)

U

03

P»

3

•N

1

n

a^JQm

neg

n

•aon

.1n

org

Q

B3f-luJ

n rg

:» 3

in n

— n

m ~f>i i

^^ ^3 VO

3 3r^ ^

CO 33m inn nrg IN

en on »

O 3

^ ^rg rg

a mn i-*' =fo org rg

3 QC3 Q31 f*tU U

03 OS

—

SI3

1

3n

COmnrg

4tp«

*~

3

<;

3

=3

^^

^

I

vO•1CT3rg

QC£,

^jU3a

r-

.1rg

3Li

1

33

0

^

coJi

nrg

V—

^

^

rg

n

o^

acen

uJ3

3

•n

in

mi

r-vO

nn

COmnrg

rg*-

j»

3]

cnoinCJ*~

nLi

i

33n^org

ausnuu03

n

33

eo»1

3OCO

•o^Xin

mrg

3»

O'NT—

onrn

org

QCOnuCJO3

O

inr*.n

oiini

J>n

33innrg

n*-',«

3>

0r»mir—

nLi

1

0

^3rg

a01r*>U•jia

*r*in

n

ini

p»rg

a'*coin

nrg

*—"3rg

<

33•oO*N

—

—mi_

•y&0rg

Q1C

f^•JU33

n

«CO

irt1

m

•«*03in—,rg

f^»

c^=T

rg

Qrg

cacefj^jtoce

n

cnn

en

oL1

Oen

0

*03in

nrg

m»

33*rg

n^Org

Qatn;juM

n

r»t

m

on

co

i

rg

9irt

03mnrg

rg

*

org•—

-f&

3rg

rjIBr>u

se

r»

*

n

in

I

CO

33in20•.n

nrg

nt

org,•

L1

^Org

a•£nua.

n

P.m3

rg3

mi

3in

^

CO•n

nrg

o.n

o

rg

j

.•0rg

a030tjUa

3

m

rg

i

CO

vn

onin

nrg

—in

org^

P,

^0rg

a03r>u

ce

on

CO

r-rg

3in33

Ioin-i

entn

nrg-

mrg

3rg

•a

,"*>

ca

—o>

iCO

^Jo!N

aC3(-1

U

3

CO

cn

mi

o

eninnrg

in•n

3;3>rg

en.org

aC3nu3

.„

COrg

rgn

rginrLion

JO

cnin

nrg

^—-y,

33

3=1rgrgr—

rgLi

1

o

Li

^Org

Ocar>(JW09

rg

3,

in

n

33

1

rgr-3<

cn•-1

nrg

in

3rgr-

f.

Li

^0rg

a;3

0

Ouc:

rg

0

CO

3

1

n

>nrg

cnin

nrg

'OLi

3rg»_

rgin

org

QC3OJJ

ce

3

.ni

cn3

31

en•n

nrg

n*~

3Of~\

nLi:±o-N

aar>uS3

- »

3 13 m

r- a>rg —

rg 7*

I t

rg or- 33

— -Nn i

cn cr»m -in nrg -g

y\ 3^ O

O 3O ^Jn —

a- -i.1 .1-t &0 3rg rg

Q aC5 i'd0 >T

^* M3] J

rg n

1

3 1n n

rg org 3

0 —V.1 Li

1 1

O N-1 O

3- 0

"^3> cn.1 m

n n^ ^

.— \ r-.J 3

0 33> a>rg rg

0 P»vTl LI^ ^3"0 O• rg

a aC5 32n oO uu u3: '-S

5-3

IWY5ANational Aeronautics andSpace Administration

Goddard Space Flight CenterGreenbelt, Maryland 20771