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  The Sloan Digital Sky Survey Reverberation Mapping Project: the XMM-Newton X-ray source catalog and multi-band counterparts

Liu, T., Merloni, A., Simm, T., Green, P. J., Brandt, W. N., Schneider, D. P., et al. (2020). The Sloan Digital Sky Survey Reverberation Mapping Project: the XMM-Newton X-ray source catalog and multi-band counterparts. Astrophysical Journal Supplement Series, 250(2): 32. doi:10.3847/1538-4365/abb5b0.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-8AD9-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-8ADA-8
Genre: Journal Article

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 Creators:
Liu, Teng1, Author              
Merloni, Andrea1, Author              
Simm, Torben1, Author              
Green, Paul J., Author
Brandt, William N., Author
Schneider, Donald P., Author
Dwelly, Tom1, Author              
Salvato, Mara1, Author              
Buchner, Johannes1, Author              
Shen, Yue, Author
Nandra, Kirpal1, Author              
Georgakakis, Antonis, Author
Ho, Luis C., Author
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1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: The XMM-RM project was designed to provide X-ray coverage of the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) field. Forty-one XMM-Newton exposures, placed surrounding the Chandra AEGIS field, were taken, covering an area of 6.13 deg2 and reaching a nominal exposure depth of ~15 ks. We present an X-ray catalog of 3553 sources detected in these data, using a PSF-fitting algorithm and a sample selection threshold that produces a ~5% fraction of spurious sources. In addition to the PSF-fitting likelihood, we calculate a second source reliability measure based on Poisson theory using source and background counts within an aperture. Using the Poissonian likelihood, we select a subsample with a high purity and find that it has number count profiles similar to previous X-ray surveys. The Bayesian method "NWAY" was employed to identify counterparts of the X-ray sources from the optical Legacy and the IR unWISE catalogs, using a two-dimensional unWISE magnitude–color prior created from optical/IR counterparts of Chandra X-ray sources. A significant number of the optical/IR counterparts correspond to sources with low detection likelihoods, proving the value of retaining the low-likelihood detections in the catalog. A total of 932 of the XMM-RM sources are covered by SDSS spectroscopic observations, where 89% of them are classified as active galactic nuclei, and 71% of these active galactic nuclei are in the SDSS-RM quasar catalog. Among the SDSS-RM quasars, 80% are detectable at the depth of the XMM observations.

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 Dates: 2020-10-09
 Publication Status: Published online
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 Identifiers: DOI: 10.3847/1538-4365/abb5b0
Other: LOCALID: 3270625
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Title: Astrophysical Journal Supplement Series
Source Genre: Journal
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Publ. Info: Chicago : Published by the University of Chicago Press for the American Astronomical Society.
Pages: - Volume / Issue: 250 (2) Sequence Number: 32 Start / End Page: - Identifier: ISSN: 0067-0049
CoNE: https://pure.mpg.de/cone/journals/resource/954922828211