INTEGRAL detection of a new outburst of A 0535+262
ATel #3173; C. Tchernin, C. Ferrigno, E. Bozzo (ISDC - Switzerland)
on 17 Feb 2011; 18:16 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Carlo Ferrigno (Carlo.Ferrigno@unige.ch)
Subjects: X-ray, Neutron Star, Transient
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,
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.