Continued RXTE observations of GRO J1655-40
ATel #433; J. Swank (GSFC) and C. Markwardt (UMD/GSFC)
on 1 Mar 2005; 13:12 UT
Credential Certification: Jean Swank (swank@milkyway.gsfc.nasa.gov)
Subjects: X-ray, Binary, Black Hole, Transient
GRO J1655-40 has been observed with the RXTE pointed instruments each
day during Feb 21-Mar 1. The flux has risen only slowly during this
period: The 2-10 keV and 10-60 keV flux fluxes on Feb 21.9 were 8.4
and 16.7 mCrab, respectively, and on Feb 27.9 were 17.1 and 36.1
mCrab. During a period of 3 hr Feb 27.96-28.10 there was a sequence
of dips by as much as 50%, a phenomenon discovered during 1997
observations (Kuulkers et al. 1998, ApJ, 494, 753).The flux Mar 1
was the same as that of Feb 26, confirming the plateau noted for the
INTEGRAL data (ATEL #432). Most of the flux has been in a power law of
index 1.66+/- 0.05. Outside the dips at least, no iron line emission
is required in the fits.
