TY - JOUR
T1 - The palermo swift-BAT hard X-ray catalogue II. Results after 39 months of sky survey
AU - Cusumano, G.
AU - La Parola, V.
AU - Segreto, A.
AU - Mangano, V.
AU - Ferrigno, C.
AU - Maselli, A.
AU - Romano, P.
AU - Mineo, T.
AU - Sbarufatti, B.
AU - Campana, S.
AU - Chincarini, G.
AU - Giommi, P.
AU - Masetti, N.
AU - Moretti, A.
AU - Tagliaferri, G.
PY - 2010
Y1 - 2010
N2 - Aims: We present the Palermo Swift-BAT hard X-ray catalogue obtained from the analysis of data acquired during the first 39 months of the Swift mission. Methods: We developed a dedicated software to perform the data reduction, mosaicking, and source detection of the BAT survey data. We analyzed the BAT dataset in three energy bands (14-150 keV, 14-30 keV, 14-70 keV), obtaining a list of 962 detections above a significance threshold of 4.8 standard deviations. The identification of the source counterparts was pursued using three strategies: cross-correlation with published hard X-ray catalogues, analysis of field observations of soft X-ray instruments, and cross-correlation with SIMBAD databases. Results: The survey covers 90% of the sky down to a flux limit of 2.5 × 10-11 erg cm-2 s-1 and 50% of the sky down to a flux limit of 1.8 × 10-11 erg cm -2 s-1 in the 14-150 keV band. We derived a catalogue of 754 identified sources, of which ∼69% are extragalactic, ∼27% are Galactic objects, and ∼4% are already known X-ray or gamma ray emitters, whose nature has yet to be determined. The integrated flux of the extragalactic sample is ∼1% of the cosmic X-ray background in the 14-150 keV range.
AB - Aims: We present the Palermo Swift-BAT hard X-ray catalogue obtained from the analysis of data acquired during the first 39 months of the Swift mission. Methods: We developed a dedicated software to perform the data reduction, mosaicking, and source detection of the BAT survey data. We analyzed the BAT dataset in three energy bands (14-150 keV, 14-30 keV, 14-70 keV), obtaining a list of 962 detections above a significance threshold of 4.8 standard deviations. The identification of the source counterparts was pursued using three strategies: cross-correlation with published hard X-ray catalogues, analysis of field observations of soft X-ray instruments, and cross-correlation with SIMBAD databases. Results: The survey covers 90% of the sky down to a flux limit of 2.5 × 10-11 erg cm-2 s-1 and 50% of the sky down to a flux limit of 1.8 × 10-11 erg cm -2 s-1 in the 14-150 keV band. We derived a catalogue of 754 identified sources, of which ∼69% are extragalactic, ∼27% are Galactic objects, and ∼4% are already known X-ray or gamma ray emitters, whose nature has yet to be determined. The integrated flux of the extragalactic sample is ∼1% of the cosmic X-ray background in the 14-150 keV range.
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U2 - 10.1051/0004-6361/200811184
DO - 10.1051/0004-6361/200811184
M3 - Article
AN - SCOPUS:79952239178
SN - 0004-6361
VL - 510
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 1
M1 - A48
ER -