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Multi-Wavelength Data Fusion for Spitzer/Herschel EG Surveys. Mattia Vaccari - University of Padova [email protected] www.mattiavaccari.net Alberto Franceschini & Giulia Rodighiero Anna Feltre & Gabriele Mainetti & Lucia Marchetti EuroVO AIDA2 Talk – ESAC – 19 Nov 2009. - PowerPoint PPT Presentation
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EuroVO AIDA2 Spitzer/Herschel EG Surveys
Multi-Wavelength Data Fusionfor Spitzer/Herschel EG Surveys
Mattia Vaccari - University of [email protected] www.mattiavaccari.net
Alberto Franceschini & Giulia RodighieroAnna Feltre & Gabriele Mainetti & Lucia Marchetti
EuroVO AIDA2 Talk – ESAC – 19 Nov 2009
Spitzer / Herschel
Multi-Wavelength Data Fusionfor Long-Wavelength EG Surveys
25 years ago IRAS first hinted at the rapidly evolving properties of Infrared Galaxies in the Local Universe
In the late 1990s the careful analysis of COBE revealed a diffuse CBR at IR wavelengths which ISO and SCUBA were able to resolve in individual sources in the MIR & SMM
Since 2003 Spitzer MIR/FIR EG surveys have shed further light on the dust-obscured Cosmic SFH, bridging the gap between MIR & SMM surveys and turning a fledgling discipline into a standard tool for galaxy evolution studies
Herschel now promises to provide the FIR/SMM resolution and sensitivity required to put our knowledge of this spectral range on a par with Spitzer’s & SCUBA(2)’s
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Spitzer / Herschel
Breaking Down the CIRB
EuroVO AIDA2 Spitzer/Herschel EG Surveys
A full understanding of galaxy formation and evolution processes requires resolving the CIRB into its constituent sources at different
wavelengths
Lagache+ 05
CIRB COB
CIRB ~ COB
Spitzer / Herschel
ISOIRAS
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Soifer+ 2008
IR Luminosity (SFR) Densityas a function of redshift
Spitzer
Spitzer / Herschel
HerMES Blank Fields (~70 deg2)
EuroVO AIDA2 Spitzer/Herschel EG Surveys
BG : IRAS 100 micron
Spitzer / Herschel
Revealing the MIR/FIR Local UniverseBuilding the SWIRE-SDSS Database
SWIRE (MIR/FIR photometry) & SDSS (Optical Spectro-Photometry) provide well-matched depths for studies of the MIR/FIR Local Universe
SWIRE-SDSS covers ~ 22.5 deg2 (35 deg2 including non-SWIRE fields)
We cross-correlated the (recently completed) SWIRE 24/70/160 micron catalogs with a wealth of data spanning the UV-to-FIR spectral range
We thus produced the largest database of Spitzer 24/70/160 micron sources with a spectroscopic and/or photometric redshift measurement, placing stronger constraints on the evolution and modeling of IR sources
6 SWIRE Fields ~ 50 deg2
Gold Standard of Large-Area Extragalactic Survey Fields
Full broad-band photometric coverage from UV/Opt/NIR to MIR/FIR/SMM (and soon
deeper/wider FIR/SMM with Herschel & SCUBA2)
Spitzer / Herschel
A Multi-Wavelength EG Catalog of Spitzer Sources in Wide-Area Fields
Spitzer Public Catalogs (SWIRE, Bootes, COSMOS, XFLS)– IRAC-selected– MIPS 24/70/160 always available– MIPS 24 source density generally well-matched with beam
size– MIPS 70/160 larger beams increase ambiguity of XID process– Nearest MIPS 24 source is chosen as most likely counterpart
GALEX always available SDSS available in the North (Astro/Photo Calibration) Miscellaneous Optical Imaging (SWIRE, NDWFS,
WFS…) 2MASS always available (Spitzer Astro Calibration) UKIDSS available in XMM/LH/EN1 but little else in NIR Spec-Z available (if poorly documented) from NED Extra Spec-Z ( LH by Owen+ 09 – ES1 by Sacchi+ 09 )
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Spitzer / Herschel
EuroVO AIDA2 Spitzer/Herschel EG Surveys
MIPS-160 Positional XID ReliabilityIndications for HerMES Bright Sources
Spitzer / Herschel
MIPS-160 Positional XID ReliabilityIndications for HerMES Bright Sources
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Spitzer / Herschel
Spitzer Data Fusion as of 30/10/09
EuroVO AIDA2 Spitzer/Herschel EG Surveys
IRAC3.6/4.5
MIPS24
MIPS70
MIPS160
GALEXNUV/FUV
SDSSugriz
OptUgriZ
2MASS
J/H/K
UKIDSS
J/K
Area
deg2
ES1 390200 61226 1946 876 66738 NA “NA” 10858 NA ~7.0
XMM 497923 69611 3406 1547 195924 NA “NA” 14728 107392 ~8.5
CDFS 462596 96987 4075 1801 202101 NA 172231
12926 NA ~7.5
LH 660571 110479
5288 2313 125534 212703 270459
17088 158191 ~11.0
EN1 575153 102344
4479 2067 212547 206952 280259
21184 236708 ~9.5
EN2 272388 59370 2332 972 50840 100985 166130
11422 NA ~4.5
Bootes 670446 “NA” “NA” “NA” 286501 213043 “NA” 6932 NA ~8.5
XFLS 103193 12152 “NA” “NA” 22489 58285 79491 11410 NA ~4.5
Lots of COSMOS and EGS and GOODS-N/S public data are also available (but perhaps best left to the field’s experts?)
Sparse multi-wavelength public data available within ADFS
Even if deeper Opt/NIR imaging is available, SDSS/2MASS data are useful to calibrate astrometry and photometry
Spitzer / Herschel
Star-Galaxy Separation
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Spitzer / Herschel
Color-Color Diagrams
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Exploiting Diagnostic Power of multi-wavelength information
Up to 2 UV + 5 Opt + 3 NIR + 7 Spitzer = 17 bands
(Above) IRAC Color-Color Plots by Lacy+ 04 and Stern+05
Spitzer / Herschel
Catalog Strengths (& Weaknesses) It is a most useful first attempt at a multi-wavelength
catalog supporting HerMES early (and later) science
It is already available and reasonably well-documented
It is being validated/improved (e.g. through Phot-Z work)
It isn’t a replacement for a catalog extracted on images smeared to a common PSF and/or benefiting from expert knowledge about combined databases at all wavelengths
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Spitzer / Herschel
What the VO can do for us We plan to use VO tools to improve our catalog as
follows:– Increasing the range of quantities it provides– Improving the ‘connectivity’ between its tables– Enabling its easy updating by scripting most of its workflow– Putting in place stringent checks on its VO-compliancy
We plan to use VO tools to exploit our catalog as follows:– …– …
…
EuroVO AIDA2 Spitzer/Herschel EG Surveys
Spitzer / Herschel
What we can do for the VO Our group has got a long-standing experience in the
planning and exploitation of MIR/FIR observations by ISO & Spitzer– Unrestricted access to SWIRE and SERVS Spitzer datasets– Heavily involved in PEP/HerMES/ATLAS Herschel Key Programs
We are thus in the best position to– Exploit Spitzer/Herschel data in a timely way– Further ‘advertise’ VO and its tools within the MIR/FIR
community
EuroVO AIDA2 Spitzer/Herschel EG Surveys