Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-07-22
Astron.Astrophys. 428 (2004) 383-399
Astronomy and Astrophysics
Astrophysics
42 pages, 7 figures, 8 Tables, Accepted for publication in A&A
Scientific paper
10.1051/0004-6361:20040252
ABRIDGED. We present "The XMM-Newton Bright Serendipitous Survey", two flux-limited samples with flux limit fx ~7E-14 cgs in the 0.5-4.5 keV (BSS) and 4.5-7.5 keV (HBSS) energy band, respectively. After discussing the survey strategy, we present the basic data on a complete sample of 400 X-ray sources derived from the analysis of 237 XMM-Newton fields. The survey covers an area of 28.10 (25.17 for the HBSS) sq. deg. Up to now ~71% (~90%) of the sources have been spectroscopically identified making the BSS (HBSS) the sample with the highest number of identified XMM-Newton sources published so far. We find that: a) the optical counterpart in the majority (~90%) of cases has a magnitude brighter than the POSS II limit; b) the majority of the objects identified so far are broad line AGN. No obvious trend of the source spectra (as deduced from the Hardness Ratios analysis) as a function of the count rate is seen and the average spectra of the "extragalactic" population corresponds to an X-ray energy spectral index of ~0.8 (~0.64) for the BSS (HBSS) sample. About 13% (40%) of the sources are described by an energy spectral index flatter than that of the CXB. We measure a surface density of optically type 1 and type 2 AGN of 1.63+/-0.25 deg-2 and 0.83+/-0.18$ deg-2, respectively; optically type 2 AGN represent 34+/-9% of the total AGN population. Finally, we find a clear separation, in the hardness ratio diagram and in the (hardness ratio) vs. (X-ray to optical flux ratio) diagram, between "coronal emitting" stars and extragalactic sources.
Barcons Xavier
Braito Valentina
Brunner Hermann
Caccianiga Alessandro
Carrera Francicso J.
No associations
LandOfFree
Exploring the X-ray Sky with the XMM-Newton Bright Serendipitous Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Exploring the X-ray Sky with the XMM-Newton Bright Serendipitous Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exploring the X-ray Sky with the XMM-Newton Bright Serendipitous Survey will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-277736