The Palermo Swift-BAT Hard X-ray Catalogue. II- Results after 39 months of sky survey - Astrophysics > High Energy Astrophysical PhenomenaReportar como inadecuado




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Abstract: We present the Palermo Swift-BAT hard X-ray catalogue obtained from theanalysis of the the data relative to the first 39 months of the Swift mission.We have developed a dedicated software to perform data reduction, mosaickingand source detection on the BAT survey data. We analyzed the BAT dataset inthree energy bands 14-150 keV, 14-30 keV, 14-70 keV, obtaining a list of 962detections above a significance threshold of 4.8 standard deviations. Theidentification of the source counterparts was pursued using three strategies:cross-correlation with published hard X-ray catalogues, analysis of fieldobservations of soft X-ray instruments, cross-correlation with the SIMBADdatabases. The survey covers 90% of the sky down to a flux limit of 2.5x10E-11erg-cm2-s and 50% of the sky down to a flux limit of 1.8x10E-11 erg-cm2-s inthe 14-150 keV band. We derived a catalogue of 754 identified sources, of which~69% are extragalactic, ~27% are Galactic objects, ~4% are already known X-rayor gamma ray emitters whose nature has not been determined yet. The integratedflux of the extragalactic sample is ~1% of the Cosmic X-ray background in the14-150 keV range.



Autor: G. Cusumano, V. La Parola, A. Segreto, V. Mangano, C. Ferrigno, A. Maselli, P. Romano, T. Mineo, B. Sbarufatti, S. Campana, G. Ch

Fuente: https://arxiv.org/



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