1FGL J1417.7-4407: A likely gamma-ray bright binary with a massive neutron star and a giant secondary

@article{Strader20151FGLJA,
  title={1FGL J1417.7-4407: A likely gamma-ray bright binary with a massive neutron star and a giant secondary},
  author={J. Strader and L. Chomiuk and C. Cheung and D. Sand and D. Donato and R. Corbet and D. Koeppe and P. Edwards and J. Stevens and L. Petrov and R. Salinas and M. Peacock and T. Finzell and D. Reichart and J. Haislip},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2015}
}
We present multiwavelength observations of the persistent Fermi-LAT unidentified gamma-ray source 1FGL J1417.7-4407, showing it is likely to be associated with a newly discovered X-ray binary containing a massive neutron star (nearly 2 M_sun) and a ~ 0.35 M_sun giant secondary with a 5.4 day period. SOAR optical spectroscopy at a range of orbital phases reveals variable double-peaked H-alpha emission, consistent with the presence of an accretion disk. The lack of radio emission and evidence for… Expand
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