Stephanie M. Lamassa, C. Megan Urry, Nico Cappelluti, Hans Böhringer, Andrea Comastri, Eilat Glikman, Gordon Richards, Tonima Ananna, Marcella Brusa, Carie Cardamone, Gayoung Chon, Francesca Civano, Duncan Farrah, Marat Gilfanov, Paul Green, S. Komossa, Paulina Lira, Martin Makler, Stefano Marchesi, Robert PecoraroPiero Ranalli, Mara Salvato, Kevin Schawinski, Daniel Stern, Ezequiel Treister, Marco Viero

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


We release the next installment of the Stripe 82 X-ray survey point-source catalog, which currently covers 31.3 deg2 of the Sloan Digital Sky Survey (SDSS) Stripe 82 Legacy field. In total, 6181 unique X-ray sources are significantly detected with XMM-Newton (>5σ) and Chandra (>4.5σ). This catalog release includes data from XMM-Newton cycle AO 13, which approximately doubled the Stripe 82X survey area. The flux limits of the Stripe 82X survey are 8.7 10-16 erg s-1 cm-2, 4.7 10-15 erg s-1 cm-2, and 2.1 10-15 erg s-1 cm-2 in the soft (0.5-2 keV), hard (2-10 keV), and full bands (0.5-10 keV), respectively, with approximate half-area survey flux limits of 5.4 10-15 erg s-1 cm-2, 2.9 10-14 erg s-1 cm-2, and 1.7 10-14 erg s-1 cm-2. We matched the X-ray source lists to available multi-wavelength catalogs, including updated matches to the previous release of the Stripe 82X survey; 88% of the sample is matched to a multi-wavelength counterpart. Due to the wide area of Stripe 82X and rich ancillary multi-wavelength data, including coadded SDSS photometry, mid-infrared WISE coverage, near-infrared coverage from UKIDSS and VISTA Hemisphere Survey, ultraviolet coverage from GALEX, radio coverage from FIRST, and far-infrared coverage from Herschel, as well as existing ∼30% optical spectroscopic completeness, we are beginning to uncover rare objects, such as obscured high-luminosity active galactic nuclei at high-redshift. The Stripe 82X point source catalog is a valuable data set for constraining how this population grows and evolves, as well as for studying how they interact with the galaxies in which they live.

Original languageEnglish (US)
Article number172
JournalAstrophysical Journal
Issue number2
StatePublished - Feb 1 2016
Externally publishedYes


  • X-rays: general
  • catalogs
  • galaxies: active
  • quasars: general
  • surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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