- ID:
- ivo://nasa.heasarc/elaisfbmc
- Title:
- European Large-Area ISO Survey (ELAIS) Final Band-Merged Catalog
- Short Name:
- ELAISFBMC
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This table contains the final band-merged European Large-Area ISO Survey (ELAIS) Catalog at 6.7, 15, 90 and 175 microns (µm), and the associated data at U, g', r', i', Z, J, H, K and 20 cm. The origin of the survey, infrared and radio observations, data-reduction and optical identifications are briefly reviewed in the reference paper, and a summary of the area covered and the completeness limit for each infrared band is given. A detailed discussion of the band-merging and optical association strategy is given in the paper. The total catalog consists of 3762 sources. 23% of the 15-um sources and 75% of the 6.7-um sources are stars. In the paper, for extragalactic sources observed in three or more infrared bands, color-color diagrams are presented and discussed in terms of the contributing infrared populations. 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 log<sub>10</sub> of 1-1000 um luminosity L<sub>ir</sub> > 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 (L<sub>ir</sub> > 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 (L<sub>ir</sub> > 11.5), cool (cirrus-type SEDs) galaxies, with L<sub>ir</sub> - L<sub>opt</sub> > 0, implying A<sub>V</sub> > 1. This table contains the total catalog of 3762 ELIAS band-merged sources. This table was created by the HEASARC in October 2012 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/351/1290">CDS Catalog J/MNRAS/351/1290</a> files catalog.dat (3523 sources) and unassoc.dat (239 sources). It was last updated in November 2012 to correct the 6.7-micron flux density values for 14 entries using data provided directly from the primary author. This is a service provided by NASA HEASARC .
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- ID:
- ivo://nasa.heasarc/isolog
- Title:
- ISO (Infrared Space Observatory) Observation Log
- Short Name:
- ISO
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This database is the ISO (Infrared Space Observatory) Observation Log of Validated Data. ISO is an ESA (European Space Agency) project with instruments funded by ESA member states (especially the PI countries of France, Germany, the Netherlands and the United Kingdom), and with the participation of ISAS (Japan) and NASA (USA). ISO operated from November 1995 till May 1998, almost a year longer than expected. 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 (<a href="http://iso.esac.esa.int/ida/">http://iso.esac.esa.int/ida/</a>), which is available at the ISO Data Centre (<a href="http://iso.esac.esa.int/">http://iso.esac.esa.int/</a>), 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. The ISO helpdesk can be reached at <a href="http://iso.esac.esa.int/esupport/">http://iso.esac.esa.int/esupport/</a> This online catalog was last updated by the HEASARC in September 2004 based on the machine-readable table <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VI/111/isolog.dat.gz">https://cdsarc.cds.unistra.fr/ftp/cats/VI/111/isolog.dat.gz</a> obtained from the CDS data center. This is a service provided by NASA HEASARC .
