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http://hdl.handle.net/20.500.12386/34559
Title: | The deep Chandra survey in the SDSS J1030+0524 field | Authors: | NANNI, RICCARDO GILLI, Roberto VIGNALI, CRISTIAN MIGNOLI, Marco PECA, ALESSANDRO MARCHESI, STEFANO Annunziatella, Marianna Brusa, Marcella CALURA, Francesco Cappelluti, Nico Chiaberge, Marco COMASTRI, Andrea Iwasawa, K. LANZUISI, Giorgio LIUZZO, Elisabetta Teodorina Marchesini, D. PRANDONI, ISABELLA TOZZI, Paolo VITO, Fabio Zamorani, Gianni Norman, C. |
Issue Date: | 2020 | Journal: | ASTRONOMY & ASTROPHYSICS | Number: | 637 | First Page: | A52 | Abstract: | We present the X-ray source catalog for the ∼479 ks Chandra exposure of the SDSS J1030+0524 field, which is centered on a region that shows the best evidence to date of an overdensity around a z > 6 quasar, and also includes a galaxy overdensity around a Compton-thick Fanaroff-Riley type II (FRII) radio galaxy at z = 1.7. Using wavdetect for initial source detection and ACIS Extract for source photometry and significance assessment, we create preliminary catalogs of sources that are detected in the full (0.5-7.0 keV), soft (0.5-2.0 keV), and hard (2-7 keV) bands, respectively. We produce X-ray simulations that mirror our Chandra observation to filter our preliminary catalogs and achieve a completeness level of > 91% and a reliability level of ∼95% in each band. The catalogs in the three bands are then matched into a final main catalog of 256 unique sources. Among them, 244, 193, and 208 are detected in the full, soft, and hard bands, respectively. The Chandra observation covers a total area of 335 arcmin<SUP>2</SUP> and reaches flux limits over the central few square arcmins of ∼3 × 10<SUP>-16</SUP>, 6 × 10<SUP>-17</SUP>, and 2 × 10<SUP>-16</SUP> erg cm<SUP>-2</SUP> s<SUP>-1</SUP> in the full, soft, and hard bands, respectively This makes J1030 field the fifth deepest extragalactic X-ray survey to date. The field is part of the Multiwavelength Survey by Yale-Chile (MUSYC), and is also covered by optical imaging data from the Large Binocular Camera (LBC) at the Large Binocular Telescope (LBT), near-infrared imaging data from the Canada France Hawaii Telescope WIRCam (CFHT/WIRCam), and Spitzer IRAC. Thanks to its dense multi-wavelength coverage, J1030 represents a legacy field for the study of large-scale structures around distant accreting supermassive black holes. Using a likelihood ratio analysis, we associate multi-band (r, z, J, and 4.5 μm) counterparts for 252 (98.4%) of the 256 Chandra sources, with an estimated reliability of 95%. Finally, we compute the cumulative number of sources in each X-ray band, finding that they are in general agreement with the results from the Chandra Deep Fields. <P />Full Table 4 (catalog) is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr/">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/637/A52">http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/637/A52</A> | URI: | http://hdl.handle.net/20.500.12386/34559 | URL: | https://www.aanda.org/articles/aa/full_html/2020/05/aa37914-20/aa37914-20.html http://arxiv.org/abs/2003.13710v1 |
ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/202037914 | Bibcode ADS: | 2020A&A...637A..52N | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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aa37914-20.pdf | PDF editoriale | 5.58 MB | Adobe PDF | View/Open |
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