XMM-Newton Slew Survey discovers a new, bright X-ray transient, XMMSL1 J070542.7-381442
ATel #1282; A. M. Read (U. Leicester), R. D. Saxton (ESAC) and P. Esquej (MPE)
on 16 Nov 2007; 09:52 UT
Credential Certification: Dr. Andy Read (amr30@star.le.ac.uk)
Subjects: X-ray, Transient
ESA's XMM-Newton, in its Slew Survey mode, has detected a very bright
(53.7 ct/s in EPIC-pn [0.2-2 keV]), new transient at a position of:
RA, Dec (J2000) = 07:05:42.7 -38:14:42
(estimated error radius: 8 arcseconds).
It was detected in an XMM-Newton Slew from 8th October 2007, and is
seen to have increased in flux over the ROSAT All-Sky Survey (RASS)
upper limit by a factor of more than 400.
The source has been designated the name: XMMSL1 J070542.7-381442
The XMM-Newton Slew Survey spectrum is extremely soft, with
essentially no counts above 1keV. This, together with the fact that
the source is quite close to the Galactic plane and has a very large
column density out of the Galaxy (nH~1.4e21 atoms/cm^2) indicates
that the source is very likely Galactic in origin, and perhaps very
close.
The source may have an optical counterpart (USNO-A2.0 0450-03360039 :
Bmag=15.7 Rmag=15.9).
