Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-04-27
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
6 pages, 3 figures. Accepted for publication in PoS (contribution PoS(INTEGRAL 2010)131), proceedings of the 8th INTEGRAL Work
Scientific paper
AX J1910.7+0917 is a still unidentified source discovered with ASCA and observed more recently with IBIS/ISGRI, mainly noticeable for its rather hard spectrum. We analyzed all the public available data on this source, and we took advantage of the recent improvements performed in the INTEGRAL data analysis software to fully exploit the IBIS/ISGRI data. In the data collected from INTEGRAL, XMM-Newton, Chandra and ASCA the source is clearly variable. The spectrum can be modelled as an absorbed powerlaw (NH~6x10^22 cm^-2, Gamma=1.5) with an iron line at 6.4 keV. The present data still do not allow for a unique classification of the source. In the IBIS/ISGRI field of view around AX J1910.7+0917, we discovered three new sources: IGR J19173+0747, IGR J19294+1327 and IGR J19149+1036, where the latter is positionally coincident with the Einstein source 2E 1912.5+1031. For the first two sources we report results obtained from follow-up observations carried out with Swift/XRT.
Bozzo Emanuele
Ferrigno Carlo
Manousakis Antonia
Pavan Lucia
Ricci Claudia
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