EuroVO AIDA2 Spitzer/Herschel EG Surveys Multi-Wavelength Data Fusion for Spitzer/Herschel EG Surveys Mattia Vaccari - University of Padova [email protected]@mattiavaccari.net

EuroVO AIDA2 Spitzer/Herschel EG Surveys

Multi-Wavelength Data Fusion

for Spitzer/Herschel EG Surveys

Mattia Vaccari - University of [email protected] www.mattiavaccari.net

Alberto Franceschini & Giulia Rodighiero

Anna Feltre & Gabriele Mainetti & Lucia Marchetti

EuroVO AIDA2 Talk – ESAC – 19 Nov 2009

mailto:[email protected]

http://www.mattiavaccari.net/

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


Spitzer / Herschel

Breaking Down the CIRB


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


Soifer+ 2008

IR Luminosity (SFR) Densityas a function of redshift

Spitzer

Spitzer / Herschel

HerMES Blank Fields (~70 deg2)


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 )


Spitzer / Herschel


MIPS-160 Positional XID ReliabilityIndications for HerMES Bright Sources

Spitzer / Herschel

MIPS-160 Positional XID ReliabilityIndications for HerMES Bright Sources


Spitzer / Herschel

Spitzer Data Fusion as of 30/10/09


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


Spitzer / Herschel

Color-Color Diagrams


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


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:– …– …

…


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


Documents

EuroVO AIDA2 Spitzer/Herschel EG Surveys Multi-Wavelength Data Fusion for Spitzer/Herschel EG Surveys Mattia Vaccari - University of Padova [email protected]@mattiavaccari.net