{ "id": "1702.00474", "version": "v1", "published": "2017-02-01T22:06:54.000Z", "updated": "2017-02-01T22:06:54.000Z", "title": "A multi-wavelength investigation of candidate milli-second pulsars in unassociated gamma-ray sources", "authors": [ "D. Salvetti", "R. P. Mignani", "A. De Luca", "M. Marelli", "C. Pallanca", "A. A. Breeveld", "A. Belfiore", "W. Becker", "J. Greiner" ], "comment": "19 pages, 11 figures, 2 tables, submitted to MNRAS", "categories": [ "astro-ph.HE" ], "abstract": "About one third of the 3033 gamma-ray sources in the Third Fermi-LAT Gamma-ray Source Catalogue (3FGL) are unidentified and have not even a tentative association with a known object, hence they are defined as unassociated. Among Galactic gamma-ray sources, pulsars represent the largest class, with over 200 identifications to date. About one third of them have been discovered to be milli-second pulsars (MSPs) in binary systems. Therefore, it is plausible that a sizeable fraction of the unassociated Galactic gamma-ray sources belong to this class. We observed in the X-rays and in the optical the fields of twelve unassociated Fermi gamma-ray sources that are considered likely MSPs according to statistical classification techniques. Four of these sources have been identified as binary MSPs, or proposed as high-confidence candidates, when this work was in progress. Here, we identified another gamma-ray source (3FGL J0744.1-2523) as a possible binary MSP based upon the detection of a 0.115 d periodicity of its candidate optical counterpart.", "revisions": [ { "version": "v1", "updated": "2017-02-01T22:06:54.000Z" } ], "analyses": { "keywords": [ "candidate milli-second pulsars", "unassociated gamma-ray sources", "galactic gamma-ray sources belong", "multi-wavelength investigation", "third fermi-lat gamma-ray source catalogue" ], "note": { "typesetting": "TeX", "pages": 19, "language": "en", "license": "arXiv", "status": "editable" } } }