Multiwavelength Study Of Two Unidentified Gamma-ray Sources

Abstract

Most counterparts of the identified low-latitude gamma-ray sources are Isolated Neutron Stars (INSs). They are characterized by an extremely high value of the X/optical flux ratio, therefore a systematic X-ray/optical coverage of the fields of unidentified low-latitude gamma-ray sources is the best way to unveil possible INS counterparts. Since the low-latitude sources are heavily affected by the interstellar absorption in both the X-ray and optical bands, we decided to apply the above strategy to two middle-latitude EGRET sources, which could belong to a local galactic population: 3EG J0616-3310 and 3EG J1249-8330. Here we report on the global X-ray characterisation of about 300 objects, on their candidate optical counterparts and on the preliminary results of their identification.

10 pages, 7 figures, uses klups.sty. Proceedings of the Conference "The multiwavelength approach to unidentified gamma-ray sources", to appear in the Astrophysics and Space Science Journal, Eds. K.S. Cheng & G.E. Romero, Kluwer Academic Publisher

References in corpus (5)

• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• The HELLAS2XMM survey: I. The X-ray data and the Log(N)-Log(S)
• The Hamburg/RASS Catalogue of optical identifications. Northern high-galactic latitude ROSAT Bright Source Catalogue X-ray sources
• GaBoDS: The Garching-Bonn Deep Survey -- I. Anatomy of galaxy clusters in the background of NGC 300
• A multiwavelength strategy for identifying celestial gamma-ray sources

Cited by in corpus (1)

• XMM-Newton and ESO observations of the two unidentified gamma-ray sources 3EG J0616-3310 and 3EG J1249-8330