Negueruela, I.I.NegueruelaCasares, J.J.CasaresVerrecchia, FrancescoFrancescoVerrecchia2020-09-172020-09-172008-12-01https://hdl.handle.net/20.500.13025/1068The Astronomer's Telegram, #1876The 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.OpticalBinariesPulsarshttp://adsabs.harvard.edu/abs/2008ATel.1876....1N2008ATel.1876....1N