A Complete Multiwavelength Characterization of FaintChandraX-Ray Sources Seen in theSpitzerWide-Area Infrared Extragalactic (SWIRE) Survey
| Autor: | Alberto Franceschini, James Manners, Maria del Carmen Polletta, Carol Lonsdale, Eduardo Gonzalez-Solares, Jason Surace, Dave Shupe, Fan Fang, C. Kevin Xu, Duncan Farrah, Stefano Berta, Giulia Rodighiero, Ismael Perez-Fournon, Evanthia Hatziminaoglou, Harding E. Smith, Brian Siana, Michael Rowan-Robinson, Kirpal Nandra, Tom Babbedge, Mattia Vaccari, Seb Oliver, Belinda Wilkes, Frazer Owen, Deborah Padgett, Dave Frayer, Tom Jarrett, Frank Masci, Gordon Stacey, Omar Almaini, Richard McMahon, Olivia Johnson, Andrew Lawrence, Chris Willott |
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| Rok vydání: | 2005 |
| Předmět: |
Physics
COSMIC cancer database Infrared Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) X-ray FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Spectral line Redshift Galaxy Characterization (materials science) Wide area Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astronomical Journal. 129:2074-2101 |
| ISSN: | 1538-3881 0004-6256 |
| Popis: | We exploit deep combined observations with Spitzer and Chandra of the SWIRE survey in the ELAIS-N1 region, to investigate the nature of the faint X-ray and IR sources in common, to identify AGN/starburst diagnostics, and to study the sources of the X-ray and IR cosmic backgrounds. In the 17'x17' area of the Chandra ACIS-I image there are 3400 SWIRE near-IR sources with 4 sigma detections in at least 2 IRAC bands and 988 sources detected at 24micron with MIPS brighter than 0.1 mJy. Of these, 102 IRAC and 59 MIPS sources have Chandra counterparts, out of a total of 122 X-ray sources present in the area with S(0.5-8 kev)>10^(-15) erg/cm^2/s. We have constructed SEDs for each source using data from the 4 IRAC wavebands, Chandra fluxes, and optical follow-up data in the wavebands U, g', r', i', Z, and H. We fit a number of spectral templates to the SEDs at optical and infrared wavelengths to determine photometric redshifts and spectral categories, and also make use of diagnostics based on the X-ray luminosities, hardness ratios, X-ray to infrared spectral slopes and optical morphologies. Although we have spectroscopic redshifts for only a minority of the Chandra sources, the available SEDs constrain the redshifts for most of the sample sources, which turn out to be typically at 0.5 Comment: Accepted for publication in AJ, March 2005 issue |
| Databáze: | OpenAIRE |
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