EuroVO AIDA2 Spitzer/Herschel EG Surveys Multi-Wavelength Data Fusion for Spitzer/Herschel EG Surveys Mattia Vaccari - University of Padova Alberto Franceschini & Giulia Rodighiero Anna Feltre & Gabriele Mainetti & Lucia Marchetti EuroVO AIDA2 Talk – ESAC – 19 Nov 2009

Spitzer / Herschel Multi-Wavelength Data Fusion for 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 AIDA2Spitzer/Herschel EG Surveys

Spitzer / Herschel Breaking Down the CIRB EuroVO AIDA2Spitzer/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 ISO IRAS EuroVO AIDA2Spitzer/Herschel EG Surveys Soifer IR Luminosity (SFR) Density as a function of redshift Spitzer

Spitzer / Herschel HerMES Blank Fields (~70 deg 2 ) EuroVO AIDA2Spitzer/Herschel EG Surveys BG : IRAS 100 micron

Spitzer / Herschel Revealing the MIR/FIR Local Universe Building 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 deg 2 (35 deg 2 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 deg 2 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 AIDA2Spitzer/Herschel EG Surveys

Spitzer / Herschel Positional XID Reliability EuroVO AIDA2Spitzer/Herschel EG Surveys

Spitzer / Herschel EuroVO AIDA2Spitzer/Herschel EG Surveys MIPS-160 Positional XID Reliability Indications for HerMES Bright Sources

Spitzer / Herschel MIPS-160 Positional XID Reliability Indications for HerMES Bright Sources EuroVO AIDA2Spitzer/Herschel EG Surveys

Spitzer / Herschel Spitzer Data Fusion as of 30/10/09 EuroVO AIDA2Spitzer/Herschel EG Surveys IRAC 3.6/4.5 MIPS 24 MIPS 70 MIPS 160 GALEX NUV/FUV SDSS ugriz Opt UgriZ 2MASS J/H/K UKIDSS J/K Area deg 2 ES NA“NA”10858NA~7.0 XMM NA“NA” ~8.5 CDFS NA NA~7.5 LH ~11.0 EN ~9.5 EN NA~4.5 Bootes670446“NA” “NA”6932NA~8.5 XFLS “NA” 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 AIDA2Spitzer/Herschel EG Surveys

Spitzer / Herschel Color-Color Diagrams EuroVO AIDA2Spitzer/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 AIDA2Spitzer/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 AIDA2Spitzer/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 AIDA2Spitzer/Herschel EG Surveys