Mathematics – Probability
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ycat..34691211t&link_type=abstract
VizieR On-line Data Catalog: J/A+A/469/1211. Originally published in: 2007A&A...469.1211T
Mathematics
Probability
Surveys, X-Ray Sources
Scientific paper
We have obtained a 67ks XMM-Newton pointing of the SA57 region centered at 13:08:28+29:23:07 (J2000). The X-ray observations were performed on January 2005. Source detection was performed on co-added PN+MOS1+MOS2 images accumulated in four energy bands: 0.5-10keV, 0.5-2keV, 2-10keV, 5-10keV. The source detections and the X-ray photometry were performed by using the PWXDetect code (Pillitteri et al. 2006) based on wavelet transform of the count rate image We adopted a threshold on the significance level corresponding to a probability of 2*10-5 that a local maximum is generated by a Poisson fluctuation of the background counts. The limiting fluxes in the four bands are approximately: 10-15, 5*10-16, 2*10-15, 10-14erg/cm2/s, respectively. The result of this selection is a sample of 140 sources, detected in at least one band. A photographic survey of SA57 was conducted with the prime focus camera at Mayall 4 m telescope at Kitt Peak National Observatory (KPNO) from 1974 to 1989. A photometric catalogue of 8146 objects in U, BJ, F and N bands in a field of ~0.3deg2, complete to BJ~23 was used for optical identifications of the X-ray detected sources.
(2 data files).
Bershady Matthew A.
Fiore Fabrizio
Puccetti Simonetta
Tomei M.
Trevese Dario
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