XMMSL1 J171900.4-353217 : A new hard X-ray transient from the XMM-Newton Slew Survey
ATel #2607; A M Read (Leicester), R D Saxton (ESAC), P Esquej (Leicester)
on 10 May 2010; 11:40 UT
Credential Certification: Dr. Andy Read (amr30@star.le.ac.uk)
Subjects: X-ray, Transient
We report the discovery of XMMSL1 J171900.4-353217, a new hard X-ray
transient, found in an XMM-Newton slew from 10th March 2010. The
source position (2000.0) is RA:17 19 00.4 DEC:-35 32 17 with an 8'',
1 sigma error circle. No other XMM-Newton slew or XMM pointing has
covered this sky position.
The source is bright and point-like. The 0.2-10 keV count rate was 4.5
ct/s in the EPIC-pn detector. The source is spectrally hard, with all
of the detected photons in the 2-10 keV band. A power law fit to the
rudimentary slew spectrum, using a fixed Galactic absorption out of
our galaxy at this position (nH=1.0E22 cm-2), yields an approximate
spectral slope of ~0.6.
There are no obvious catalogued counterparts within ~30 arcseconds of
this source. There is one very faint (B~20) optical source (USNO-A2.0
0525-27889890) and four faint (J~16) 2MASS sources within the slew
error circle. We welcome further observations to ascertain the true
nature of the object.
