The First IBIS/ISGRI Soft Gamma-Ray Galactic Plane Survey Catalog
Hill, A. B.; Walter, R.; Malaguti, G.; Capitanio, F.; Bird, A. J.; Ubertini, P.; Malizia, A.; Bassani, L.; Bazzano, A.; Terrier, R.; Dean, A. J.; Stephen, J. B.; Del Santo, M.; Cocchi, M.; Lebrun, F.; Bodaghee, A.; Shaw, S. E.; Barlow, E. J.; Much, R.
United Kingdom, Italy, Switzerland, France, Netherlands
Abstract
We report the first high-energy survey catalog obtained with the IBIS gamma-ray imager on board INTEGRAL. The analysis has been performed on the first-year Core Program ISGRI data comprising both Galactic Plane Scan and Galactic Centre Deep Exposure pointings for a total exposure time exceeding 5 Ms. This initial survey has revealed the presence of ~120 sources detected with the unprecedented sensitivity of ~1 mcrab in the energy range 20-100 keV. Each source is located to an accuracy between 1' and 3', depending on its brightness. The outstanding IBIS capability to locate soft γ-ray emitters has allowed us to identify most of the detected sources with already known Galactic X-ray binary systems, while 28 of the objects are of unknown nature.
Based on observations with INTEGRAL, an ESA project with instruments and science data centre funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, and Spain), the Czech Republic and Poland, and with the participation of Russia and the US.