SLX 1746-331 In Outburst
ATel #1235; C. B. Markwardt (CRESST/NASA/GSFC), J. H. Swank (NASA/GSFC)
on 11 Oct 2007; 19:19 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Craig B. Markwardt (craigm@lheamail.gsfc.nasa.gov)
Subjects: X-ray, Request for Observations, Black Hole, Transient
Monitoring observations of the galactic center regions by the RXTE PCA
reveal that the black hole candidate SLX 1746-331 has entered outburst
again. The previous outburst was in 2003 (ATel #143).
The 2-10 keV flux has increased from about 8 mCrab to 120 mCrab
from Oct. 6.36 to Oct 10.41. The previous 95% upper limits had been
about 2 mCrab.
RXTE performed pointed observations on Oct 9.17 and Oct 10.72. In
the later observation, the spectrum was quite soft (consistent with a
black body plus steep power law model). The fluxes in the 2-10, 10-20
and 20-40 keV bands were 390, 8 and 1, in units of 10^{-11}
erg/cm^2/s. No significant variability was detected.
