Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725510k&link_type=abstract
American Astronomical Society, AAS Meeting #217, #255.10; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The Herschel-ATLAS Science Demonstration Phase field covers 14 square degrees in the GAMA survey 9-hour field. We have imaged 0.5 sq. degree of this area with Spitzer IRAC and have complemented with existing IRAC data in the Spitzer archive. The area overlaps with about 200 Herschel SPIRE sources. We apply a likelihood ratio (LR) and reliability (R) technique to match IRAC sources with SPIRE sources. We find 391 and 451 potential counterparts at 3.6 um and 4.5 um respectively for the area of 10" radius range around these sources. We found that there are about hundred sources which are reliable enough to be Spitzer counterparts (R > 0.8). About 10% of sources within our sample has no SDSS counterparts. There is a possible limitation of the LR method because LR technique assumes that there is only one true counterpart to a given 250 um source. Multiple counterparts might be related to interacting or lensing system.
Cooray Asantha
Herschel-ATLAS Consortium
Khostovan Ali Ahmad
Kim Sam
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