X-ray sources in the 1.75 Ms Ultra Narrow Deep Field observed by XMM-Newton

Abstract

In this work we present the results of the survey carried out on one of the deepest X-ray fields observed by the XMM-Newton satellite. The 1.75 Ms Ultra Narrow Deep Field (XMM175UNDF) survey is made by 13 observations taken over 2 years with a total exposure time of 1.75 Ms (1.372 Ms after flare-filtered) in a field of $30^{\prime }\times 30^{\prime }$ centered around the blazar 1ES 1553+113. We stacked the 13 observations reaching flux limits of $4.03\times 10^{-16}$, $1.3\times 10^{-15}$, and $9.8\times 10^{-16}erg{s}^{-1}c{m}^{-2}$ in the soft $(0.2-2\mathrm{keV})$, hard $(2-12\mathrm{keV})$, and full $(0.2-12\mathrm{keV})$ bands, respectively. Using a conservative threshold of Maximum Likelihood significance of $ML\ge 6$, corresponding to $3\sigma$, we detected 301 point-sources for which we derived positions, fluxes in different bands, and hardness ratios. Thanks to an optical follow-up carried out using the 10.4m the Gran Telescopio Canarias (GTC) on the same field in the $u^{\prime }{g}^{\prime }{r}^{\prime }{i}^{\prime }{z}^{\prime }$ bands, combined with WISE/2MASS IR data; we identified 244 optical/IR counterpart candidates for our X-ray sources and estimated their X-ray luminosities, redshift distribution, X-ray/optical $-$ X-ray/IR flux ratios, and absolute magnitudes. Finally, we divided this subsample in 40 non-active sources and 204 AGNs, of which 139 are classified as Seyfert galaxies and 41 as Quasars.

30 pages, 19 figures, to be published in ApJ

References in corpus (15)

• The Cosmic Evolution Survey (COSMOS) -- Overview
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
• The Chandra Deep Field-South Survey: 7 Ms Source Catalogs
• The Chandra COSMOS Survey, I: Overview and Point Source Catalog
• The XMM-Newton serendipitous survey IX. The fourth XMM-Newton serendipitous source catalogue
• Cosmic X-ray Surveys of Distant Active Galaxies: The Demographics, Physics, and Ecology of Growing Supermassive Black Holes
• The XMM-Newton wide-field survey in the COSMOS field: III. optical identification and multiwavelength properties of a large sample of X-ray selected sources
• The VLA Survey of the Chandra Deep Field South: I. Overview of the Radio Data
• The deepest X-ray view of high-redshift galaxies: constraints on low-rate black-hole accretion
• The XMM-Newton serendipitous survey. X: The second source catalogue from overlapping XMM-Newton observations and its long-term variable content
• Low-Level Nuclear Activity in Nearby Spiral Galaxies
• The Physical Origins of the Identified and Still Missing Components of the Warm-Hot Intergalactic Medium: Insights from Deep Surveys in the Field of Blazar 1ES1553+113
• Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras
• Observational characteristics of accretion onto black holes