The XMM-SERVS Survey: XMM-Newton Point-source Catalogs for the W-CDF-S and ELAIS-S1 Fields

Abstract

We present the X-ray point-source catalogs in two of the XMM-Spitzer Extragalactic Representative Volume Survey (XMM-SERVS) fields, W-CDF-S (4.6 deg 2 ) and ELAIS-S1 (3.2 deg 2 ), aiming to fill the gap between deep pencil-beam X-ray surveys and shallow X-ray surveys over large areas. The W-CDF-S and ELAIS-S1 regions were targeted with 2.3 and 1.0 Ms of XMM-Newton observations, respectively; 1.8 and 0.9 Ms exposures remain after flare filtering. The survey in W-CDF-S has a flux limit of 1.0 × 10 −14 erg cm −2 s −1 over 90% of its area in the 0.5-10 keV band; 4053 sources are detected in total. The survey in ELAIS-S1 has a flux limit of 1.3 × 10 −14 erg cm −2 s −1 over 90% of its area in the 0.5-10 keV band; 2630 sources are detected in total. Reliable optical-to-IR multiwavelength counterpart candidates are identified for ≈89% of the sources in W-CDF-S and ≈87% of the sources in ELAIS-S1. A total of 3129 sources in W-CDF-S and 1957 sources in ELAIS-S1 are classified as active galactic nuclei (AGNs). We also provide photometric redshifts for X-ray sources; ≈84% of the 3319/2001 sources in W-CDF-S/ELAIS-S1 with optical-to-near-IR forced photometry available have either spectroscopic redshifts or high-quality photometric redshifts. The completion of the XMM-Newton observations in the W-CDF-S and ELAIS-S1 fields marks the end of the XMM-SERVS survey data gathering. The ≈12,000 pointlike X-ray sources detected in the whole ≈13 deg 2 XMM-SERVS survey will benefit future large-sample AGN studies.

A structure function analysis of VST-COSMOS AGN

“…To give an idea, the estimated sky density limited to BLAGN and obtained from the XMM-SERVS survey of two other DDFs, namely W-CDF-S and ELAIS-S1, is ≈ 200 per sq. deg., which translates into ≈ 1, 900 BLAGN per DDF (Ni et al 2021).…”

Spectral Energy Distributions in Three Deep-drilling Fields of the Vera C. Rubin Observatory Legacy Survey of Space and Time: Source Classification and Galaxy Properties

“…The basic information for the three fields is listed in Table 1. We also refer readers to Table 1 in Chen et al (2018) and Ni et al (2021a) for similar summaries.…”

“…The following subsections will present our compilation and reduction of the photometry and redshifts in W-CDF-S 19 as a representative example. Almost the whole field is covered by X-ray to FIR surveys, and the multiwavelength coverage is presented in Figure 1 of Ni et al (2021a).…”

“…Our X-ray photometry is from the XMM-SERVS survey (Chen et al 2018;Ni et al 2021a), which has observed the W-CDF-S field for 2.3 Ms, reaching a flux limit of ≈1.0 × 10 −14 erg cm −2 s −1 in the 0.5-10 keV band. X-ray sources have already been matched to The Tractor catalog (Section 2.4; K. Nyland et al 2022, in preparation) in Ni et al (2021a).…”

“…Rich multiwavelength data sets (archival or planned) are available in all the DDFs. To name just a few, these include the XMM-Spitzer Extragalactic Representative Volume Survey (XMM-SERVS) 17 in X-rays (Chen et al 2018;Ni et al 2021a), the Spitzer DeepDrill survey in the infrared (Lacy et al 2021), and the MeerKAT International GHz Tiered Extragalactic Exploration survey in the radio (Jarvis et al 2016;Heywood et al 2022). The DDFs will be valuable for many kinds of studies involving time-domain astronomy, ultradeep imaging, or multiwavelength investigations.…”