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

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

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
Volume468
Issue number1 PART I
DOIs
StatePublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

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

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