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Spectroscopic redshifts are tabulated, where available. For the N1 and N2 areas, the Isaac Newton Telescope (INT) ugriz Wide Field Survey permits photometric redshifts to be estimated for galaxies and quasars. These agree well with the spectroscopic redshifts, within the uncertainty of the photometric method (~10% in (1 +z) for galaxies).
There is a high proportion of ultraluminous infrared galaxies (ULIRGs, with log10 of 1-1000 um luminosity Lir > 12.22) in the ELAIS Catalog (14% of 15-um galaxies with known z), many with Arp 220-like SEDs. 10% of the 15-um sources are genuine optically blank fields to r'= 24: these must have very high infrared-to-optical ratios and probably have z > 0.6, so are high-luminosity dusty starbursts or Type 2 AGN. Nine hyperluminous infrared galaxies (Lir > 13.22) and nine extremely red objects (EROs) (r-K > 6) are found in the survey. The latter are interpreted as ultraluminous dusty infrared galaxies at z ~ 1. The large numbers of ultraluminous galaxies imply very strong evolution in the star formation rate between z = 0 and 1. There is also a surprisingly large population of luminous (Lir > 11.5), cool (cirrus-type SEDs) galaxies, with Lir - Lopt > 0, implying AV > 1.
This table contains the total catalog of 3762 ELIAS band-merged sources.
As an unprecedented observatory for infrared astronomy, able to examine the cool and hidden places in the Universe, ISO successfully made nearly 30,000 scientific observations. The ISO data can be retrieved from the ISO Data Archive (http://iso.esac.esa.int/ida/), which is available at the ISO Data Centre (http://iso.esac.esa.int/), and comprises about 150,000 observations, including calibration, parallel mode and serendipitous observations.
The present catalog contains all observations performed in standard observing modes exempt from technical problems; special flags indicate calibration observations. The catalog gives observation details and provides links to quick-look images depicting the data and to observation-specific documentation.
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