Optical Spectroscopy of EXO 2030+375 during the current X-ray outburst

ATel #9265; I. A. Steele (Liverpool JMU)
on 25 Jul 2016; 08:48 UT
Credential Certification: Iain Steele (iainsteele@mac.com)

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Atel #9263 reports a new type I outburst of the High Mass X-ray binary star EXO 2030+375 with a maximum on 2016 July 20. The outburst timing corresponds to orbital phase ~0.01, compared with the value of ~0.13 that has been seen since 2007. I obtained spectra of the Be star optical counterpart of the source using the FRODOSpec spectrograph on the Liverpool Telescope with resolution R=5000 on 2016 July 17 and 2016 July 22. The spectra are identical, and show strong (EW=-34 Angstroms), single peaked H-alpha emission along with emission lines of Fe II. The spectra are also identical in appearance and line strength to the spectra of the source from 2015 and earlier in 2016 I reported in Atel #8927.

Liverpool Telescope