HD306414: optical counterpart to the peculiar X-ray transient IGR J11215-5952

Negueruela, I.; Lorenzo, J.; Herrero, A. and Norton, A.J. (2010). HD306414: optical counterpart to the peculiar X-ray transient IGR J11215-5952. In: Binaries - Key to Comprehension of the Universe, 8-12 Jun 2009, Brno, Czech Republic..

URL: http://astro.physics.muni.cz/binkey/

Abstract

We present high-resolution spectroscopy of HD 306414, optical counterpart to the hard X-ray transient IGR J11215−5952, an object belonging to the class of Supergiant Fast X-ray Transients. We derive a spectral type B0.5 Ia for HD 306414 and determine its stellar parameters from an atmosphere model fit to the spectrum. Our data, taken around the time of the February 2007 X-ray outburst, show large variations in the shape of the Hα emission feature and the radial velocities of metallic lines about the time of the X-ray emission.

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