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The predicted INTEGRAL detection of the Be X-ray binary GRO J1008-57

ATel #10466; M. Fiocchi, A. Bazzano, P. Ubertini (IAPS/INAF, Italy), L. Sidoli (IASF-Milano, Italy), V. A. Lepingwell (Univ. of Southampton, UK), E. Kuulkers (ESA/ESAC, Spain), V. Sguera (IASF-Bologna, Italy)
on 6 Jun 2017; 12:00 UT
Credential Certification: mariateresa fiocchi (mariateresa.fiocchi@iaps.inaf.it)

Subjects: X-ray, Gamma Ray, Binary, Transient

Referred to by ATel #: 10533, 10617, 10626

During recent INTEGRAL observations of the Musca region (revolutions 1823) performed between 2017-06-02 03:35:34 UTC and 2017-06-02 21:43:31 UTC (total observation time of ~61 ks) a strong activity from the Be X-ray binary GRO J1008-57 has been detected, as predicted in the ATel #10418 and reported in brightening by MAXI (see http://maxi.riken.jp/alert/novae/7905475417/7905475417.htm ).
The source has reached the following intensities:
148.0±1.5 mCrab, for a net exposure time of 35 ks (18-40 keV energy range)
74.0±2.5 mCrab, for a net exposure time of 18 ks (40-100 keV energy range)
GRO J1008-57 was within the field of view of JEM-X instruments for a net exposure time of 11.5 ks. It has been detected at a flux level of 99±2 mCrab and 153±6 mCrab in the 3-10 keV and 10-20 keV energy range, respectively.
The source field will be observed again during the next days.
We thank the staff at the ISDC for their prompt alert.