IGR J17375-3022 - caught in outburst again by XMM-Newton
ATel #2027; R D Saxton ESAC), A M Read (Leicester), P, Esquej (Leicester), E. Kuulkers (ESAC), A. Ibarra (ESAC)
on 22 Apr 2009; 22:58 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Richard Saxton (richard.saxton@sciops.esa.int)
Subjects: X-ray, Transient
The INTEGRAL source IGR J17375-3022 was discovered on 2008 October 10 (Ricci et al.
2008, ATel #1781) and faded below the detection levels within a few days,
before October 17-19 (Cadolle Bel et al. 2008, Atel #1810).
XMM-Newton has made a strong detection of the Integral source,
while performing a slew between targets on 2009-04-01 16:00:00 U.T.
A point-like source with 14 photons in the hard (2-12 keV) band and 3 photons
in the soft (0.2-2 keV) band, was detected at a position
RA: 17deg 37' 33.2", Dec: -30deg 23' 14" (J2000.0), with a 1-sigma error of 8".
This is 9" from the best X-ray position reported by SWIFT
(Beckmann et al. 2008, ATel #1783)
Using the SWIFT/XRT derived spectral model of an absorbed power-law
with total (Galactic + intrinsic) column density of 2.8e22 /cm**2
and slope=2.3 (Beckmann et al. 2008, ATel #1783), and the PIMMS
count rate converter, we infer a 2-10 keV flux of 9.8 (+/-2.7) e-11 erg/cm**2/sec,
for the XMM-Newton source, a few times higher than the SWIFT flux of
October 14 2008.
The inferred soft X-ray (0.2-2 keV) flux is 3.3e-12 erg/cm**2/sec,
which is a factor 10 higher than the 2-sigma upper limit from the
ROSAT All-Sky Survey.
We encourage sensitive follow up observations of the source to see
if it is still in outburst.
