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Multiwavelength Study of two Unidentified γ-ray Sources

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Abstract

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

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Authors and Affiliations

  1. IASF/CNR – Sezione di Milano ‘G.Occhialini’, Via E.Bassini 15, I-20133, Milano, Italy

    Nicola La Palombara & Patrizia Caraveo

  2. European Southern Observatory, Karl Schwarzschild Strasse 2, D-85740, Garching, Germany

    Roberto Mignani

  3. Instituto de Astrofisica de Canarias, Via Lactea, E-38200 La Laguna-Tenerife, Spain

    Evanthia Hatziminaoglou

  4. CESR, 9 Avenue du colonel Roche, F-31028, Toulouse, France

    Giovanni F. Bignami

  5. Isaac Newton Group of Telescopes, Edificio Mayantigo, Calle Alvarez Abreu 68, E-38700 Santa Cruz de la Palma, Spain

    Mischa Schirmer

Authors
  1. Nicola La Palombara
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  2. Patrizia Caraveo
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  3. Roberto Mignani
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  4. Evanthia Hatziminaoglou
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  5. Giovanni F. Bignami
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  6. Mischa Schirmer
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Corresponding author

Correspondence to Nicola La Palombara.

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Palombara, N.L., Caraveo, P., Mignani, R. et al. Multiwavelength Study of two Unidentified γ-ray Sources. Astrophys Space Sci 297, 335–344 (2005). https://doi.org/10.1007/s10509-005-7673-z

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  • DOI: https://doi.org/10.1007/s10509-005-7673-z

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