Optical Spectroscopy of Serendipitous Chandra Sources from the ChaMP and a Thousand Broad-band SEDs

Details Optical Spectroscopy of Serendipitous Chandra Sources from the ChaMP and a Thousand Broad-band SEDs Optical Spectroscopy of Serendipitous Chandra Sources from the ChaMP and a Thousand Broad-band SEDs

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.2203t&link_type=abstract

American Astronomical Society, HEAD meeting #12, #22.03

Astronomy and Astrophysics

Astronomy

Scientific paper

From optical spectroscopy of X-ray sources observed as part of the Chandra Multiwavelength Project (ChaMP), we present redshifts and classifications for a total of 1569 Chandra sources from our targeted spectroscopic follow-ups using the FLWO 1.5m, WIYN 3.5m, CTIO 4m, Magellan 6.5m, MMT 6.5m and Gemini 8m telescopes, and from archival SDSS spectroscopy. We classify the optical counterparts as 50% broad line AGN, 16% emission line galaxies, 14%s absorption line galaxies, and 20% stars. We detect QSOs out to z 5.5 and galaxies out to z 3. We have compiled extensive photometry, including X-ray (ChaMP), UV (GALEX), Optical (SDSS), NIR (UKIDSS, 2MASS), MIR (WISE) and Radio (FIRST, NVSS) bands. Together with our spectroscopic information, this enables us to derive detailed spectral energy distributions (SEDs) for all our extragalactic sources. We fit a variety of template SEDs to determine bolometric luminosities, and to constrain AGN and starburst components where both present. The latter in combination to the derived X-ray spectral fits for all our sources will provide us with a large sample to be able to study in detail the AGN/Star-formation coevolution and the relationship between nuclear obscuration and star-formation.

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