Optical spectroscopic observations of MXB 0656-072

Astronomy and Astrophysics – Astronomy

Scientific paper

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Optical, X-Ray, Binaries, Neutron Stars, Transients, Variables, Stars

Scientific paper

A recent X-ray outburst of MXB 0656-072 was detected by INTEGRAL (ATEL #1281), Swift and RXTE (ATEL #1293). We carried out our optical spectroscopic observations of MXB 0656-072 just before (JD 2454402-2454406) and during (JD 2454421) the outburst using 2.16m telescope at Xinglong station, National Astronomical Observatories, Chinese Academy of Sciences. EWs of Halpha line during our 2007 observational run are nearly two times of those during our 2005 and 2006 observational runs.

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