SIMBAD references

During the on-going calibration observations of the Crab, INTEGRAL detected the Be X-ray binary A 0535+262 during a new bright X-ray outburst (see also Atel #3166).

The observations on which this telegram is based were performed from 2011 Feb. 16 at 11:50 to 2011 Feb. 17 at 15:55 (UTC). The source is detected at an average flux of 1.5 and 0.8 Crab in the 20-40 keV and 40-80 keV energy bands, respectively.

The IBIS/ISGRI lightcurve shows a remarkable increase in the count-rate, thus suggesting that the currently on-going event is probably another giant outburst from the source.

Further INTEGRAL observations of the region around A 0535+262 are currently planned until 2011 Feb. 19. Observations with other instruments are encouraged.