INTEGRAL observation of 3EG J1736-2908
Gehrels, N.; Grandi, P.; Chaty, S.; Foschini, L.; Di Cocco, G.; Malaguti, G.; Dean, A. J.; Kuiper, L.; Hermsen, W.; Lund, N.; Castro-Tirado, A. J.; Mirabel, F.; Grenier, I.
Italy, Spain, France, United Kingdom, United States, Netherlands, Denmark
Abstract
The possible identification by INTEGRAL of the EGRET source 3EG J1736-2908 with the active galactic nucleus GRS 1734-292 is discussed. The latter was discovered in 1990 and later identified with a Seyfert 1 galaxy. At the time of the compilation of the 3rd EGRET Catalog, it was not considered as a possible counterpart of the source 3EG J1736-2908, which remained unidentified. A detailed multiwavelength study of the EGRET error circle is presented, by including archival radio, soft- and hard-X observations, suggesting that GRS1734-292 could be a likely counterpart of 3EG J1736-2908, even though this poses very interesting questions about the production mechanisms of γ-rays with energies greater than 100 MeV.
Based on observations with INTEGRAL, an ESA project with instruments and science data center funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic and Poland, and with the participation of Russia and the USA.