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Title:
XTE J1855-026 is a supergiant X-ray binary
Authors:
Negueruela, I.; Casares, J.; Verrecchia, F.; Blay, P.; Israel, G. L.; Covino, S.
Publication:
The Astronomer's Telegram, #1876
Publication Date:
12/2008
Origin:
ATEL
Keywords:
Optical, Binaries, Pulsars
Bibliographic Code:
2008ATel.1876....1N

Abstract

The eclipsing X-ray pulsar XTE J1855-026 (Corbet & Mukai 2002, ApJ 577, 923) has been unambiguously identified by a recent Swift observation (Romano et al., ATel #1875) with the reddened early-type star proposed as candidate counterpart by Verrecchia et al. (ATel #102).
High-quality spectra of the counterpart taken in August 2003 with the 4.2-m WHT (La Palma) show it to be a B0 Iaep luminous supergiant.
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