Multiwavelength Study of two Unidentified γ-ray Sources

Most counterparts of the identified low-latitude gamma -ray sources are isolated neutron stars (INSs). Since INSs are characterized by an extremely high value of f sub(X)/f sub(opt), a systematic X-ray/optical coverage of the fields of unidentified low-latitude gamma -ray sources is the best way to...

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Bibliographic Details
Published in:Astrophysics and space science 2005-01, Vol.297 (1-4), p.335-344
Main Authors: Palombara, Nicola La, Caraveo, Patrizia, Mignani, Roberto, Hatziminaoglou, Evanthia, Bignami, Giovanni F., Schirmer, Mischa
Format: Article
Language:English
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Summary:Most counterparts of the identified low-latitude gamma -ray sources are isolated neutron stars (INSs). Since INSs are characterized by an extremely high value of f sub(X)/f sub(opt), a systematic X-ray/optical coverage of the fields of unidentified low-latitude gamma -ray sources is the best way to unveil INS counterparts of unidentified sources. 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 characterization of about 300 objects, on their candidate optical counterparts and on the preliminary results of their identification.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-005-7673-z