Volume 574, February 2015
|Number of page(s)||15|
|Section||Catalogs and data|
|Published online||22 January 2015|
The XMM Deep Survey in the CDF-S
VII. UV catalogue of the Optical Monitor observations⋆
1 Dipartimento di FisicaUniversità di Roma “Tor Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
2 XMM-Newton Science Operation Centre, ESA, Villafranca del Castillo, Apartado 78, 28691 Villanueva de la Cañada, Spain
3 Dipartimento di Fisica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 2, 00185 Roma, Italy
4 INAF–Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
5 Dipartimento di Scienze Fisiche, Università di Napoli Federico II, via Cinthia 9, 80126 Napoli, Italy
6 Institute of Astronomy, Astrophysics, Space Applications, and Remote Sensing, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
7 Dipartimento di Fisica e Astronomia, Università di Bologna, via Berti Pichat 6/2, 40127 Bologna, Italy
Received: 17 September 2014
Accepted: 31 October 2014
Context. The XMM-Newton X-ray observatory has repeatedly observed the Chandra Deep Field-South (CDF-S) in 33 epochs (2001–2010) through the XMM-CDFS Deep Survey. During the X-ray observations, XMM-OM targeted the central 17 × 17 arcmin2 region of the X-ray field of view, providing simultaneous optical/UV coverage of the CDF-S. The resulting set of data can be used to build an XMM-OM catalogue of the CDF-S, filling the UV spectral coverage between the optical surveys and GALEX observations.
Aims. We present the UV catalogue of the XMM-CDFS Deep Survey. Its main purpose is to provide complementary UV average photometric measurements of known optical/UV sources in the CDF-S, taking advantage of the unique characteristics of the survey (UV and X-ray simultaneous data, time monitoring ~8.5 years, multi-wavelength photometry). The data reduction is also intended to improve the standard source detection on individual observations by cataloguing faint sources by stacking their exposure images.
Methods. We re-processed the XMM-OM data of the survey and stacked the exposures from consecutive observations using the standard Science Analysis System (SAS) tools to process the data obtained during single observations. Average measurements of detections with SAS good quality flags from individual observations and from stacked images were joined to compile the catalogue. Sources were validated through the cross-identification within the ESO Imaging survey (Arnouts et al. 2001) and the COMBO-17 survey (Wolf et al. 2004).
Results. Photometric data of 1129 CDF-S sources are provided in the catalogue, and optical/UV/X-ray photometric and spectroscopic information from other surveys are also included. The stacking extends the detection limits by ~1 mag in the three UV bands, contributing ~30% of the catalogued UV sources. The comparison with the available measurements in similar spectral bands confirms the validity of the XMM-OM calibration. The combined COMBO-17/X-ray classification of the “intermediate” sources (e.g. optically diluted and/or X-ray absorbed AGN) is also discussed.
Key words: catalogs / surveys / ultraviolet: galaxies / ultraviolet: general / galaxies: active
Tables 7 and 8 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (184.108.40.206) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/574/A49
© ESO, 2015
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