The XMM-SERVS survey: New XMM-Newton point-source catalogue for the XMM-LSS field

C. T.J. Chen, W. N. Brandt, B. Luo, P. Ranalli, G. Yang, D. M. Alexander, F. E. Bauer, D. D. Kelson, M. Lacy, K. Nyland, P. Tozzi, F. Vito, M. Cirasuolo, R. Gilli, M. J. Jarvis, B. D. Lehmer, M. Paolillo, D. P. Schneider, O. Shemmer, I. SmailM. Sun, M. Tanaka, M. Vaccari, C. Vignali, Y. Q. Xue, M. Banerji, K. E. Chow, B. Häußler, R. P. Norris, J. D. Silverman, J. R. Trump

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


We present an X-ray point-source catalogue from the XMM-Large Scale Structure (XMMLSS) survey region, one of the XMM-Spitzer Extragalactic Representative Volume Survey (XMM-SERVS) fields. We target the XMM-LSS region with 1.3 Ms of new XMM-Newton AO-15 observations, transforming the archival X-ray coverage in this region into a 5.3 deg2 contiguous field with uniform X-ray coverage totaling 2.7 Ms of flare-filtered exposure, with a 46 ks median PN exposure time. We provide an X-ray catalogue of 5242 sources detected in the soft (0.5-2 keV), hard (2-10 keV), and/or full (0.5-10 keV) bands with a 1 per cent expected spurious fraction determined from simulations. A total of 2381 new X-ray sources are detected compared to previous source catalogues in the same area. Our survey has flux limits of 1.7 × 10-15, 1.3 × 10-14, and 6.5 × 10-15 erg cm-2 s-1 over 90 per cent of its area in the soft, hard, and full bands, respectively, which is comparable to those of the XMM-COSMOS survey. We identify multiwavelength counterpart candidates for 99.9 per cent of the X-ray sources, of which 93 per cent are considered as reliable based on their matching likelihood ratios. The reliabilities of these high-likelihood-ratio counterparts are further confirmed to be ≈97 per cent reliable based on deep Chandra coverage over ≈5 per cent of the XMM-LSS region. Results of multiwavelength identifications are also included in the source catalogue, along with basic optical-to-infrared photometry and spectroscopic redshifts from publicly available surveys. We compute photometric redshifts for X-ray sources in 4.5 deg2 of our field where forced-aperture multiband photometry is available; > 70 per cent of the X-ray sources in this subfield have either spectroscopic or high-quality photometric redshifts.

Original languageEnglish (US)
Pages (from-to)2132-2163
Number of pages32
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
StatePublished - Aug 1 2018

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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