GRO J1655-40 Flux is Rising (Slowly)
ATel #415; C. B. Markwardt (U. Maryland & NASA/GSFC), E. Smith & J. H. Swank (NASA/GSFC)
on 20 Feb 2005; 20:11 UT
Credential Certification: Craig B. Markwardt (craigm@lheamail.gsfc.nasa.gov)
Subjects: X-ray, Binary, Black Hole, Transient
Referred to by ATel #: 417, 419
Dedicated RXTE/PCA scans of the region around GRO J1655-40 (ATEL #414)
were performed on Feb 20 around 09h UT.
The scans show only one source in the region, whose position is
consistent with GRO J1655-40 to within 4 arcmin (2.5 sigma). The 2-10
keV flux has risen to approximately 8 mCrab (compare to 4 mCrab on Feb
18, ATEL #414). No pulsations were detected, ruling out the presence
of a transient pulsar. The spectrum was fitted by a power law with
photon index 1.9, corresponding to a 10-40 keV flux of 14 mCrab.
