The Double Infrared Source toward the Soft Gamma-Ray Repeater SGR 1900+14

Details The Double Infrared Source toward the Soft Gamma-Ray Repeater SGR 1900+14 The Double Infrared Source toward the Soft Gamma-Ray Repeater SGR 1900+14

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...468..225v&link_type=abstract

Astrophysical Journal v.468, p.225

Astronomy and Astrophysics

Astronomy

21

Gamma Rays: Bursts, Gamma Rays: Observations, Stars: Supergiants

Scientific paper

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 MS 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.

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