The double infrared source toward the soft gamma-ray repeater SGR 1900+14

F. J. Vrba, C. B. Luginbuhl, K. C. Hurley, P. Li, S. R. Kulkarni, M. H. Van Kerkwijk, D. H. Hartmann, L. E. Campusano, M. J. Graham, R. G. Clowes, C. Kouveliotou, R. Probst, I. Gatley, M. Merrill, R. Joyce, R. Mendez, I. Smith, A. Schultz

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23 Scopus citations


We report the results of an extensive set of optical and near-infrared photometry and spectroscopy of the double infrared source reported by Hartmann et al. (1995) as a potential counterpart for the Galactic soft gamma-ray repeater SGR 1900+14. These objects are found to be variable but otherwise normal M5 supergiant stars at a distance of ≈ 12-15 kpc and extinguished by Av ≈ 19.2 mag, primarily by the general interstellar medium. We argue that the supergiants are likely gravitationally bound. These stars are positionally coincident with both quiescent X-ray and IRAS sources, suggestive of a yet-undetected third component to the system which may be responsible for the SGR.

Original languageEnglish (US)
Pages (from-to)225-230
Number of pages6
JournalAstrophysical Journal
Issue number1 PART I
StatePublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Gamma rays: bursts
  • Gamma rays: observations
  • Supergiants


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