[vsnet-alert 9833] XMMSL1 J152835.4+593754 - a new X-ray transient

[Taichi Kato]

   Outburst of a flare star?

   An SBS object SBS1527+598 (stellar, position not well determined) is
also present in its neighborhood.

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The Astronomer's Telegram                   http://www.astronomerstelegram.org 
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Posted: Fri Jan 18 01:30:03 EST 2008 -- Sat Jan 19 01:30:02 EST 2008
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ATEL #1361							     ATEL #1361

Title:		XMMSL1 J152835.4+593754 - a new X-ray transient
Author:	Richard Saxton (ESAC), Andy Read (U. Leicester), P. Esquej
		(MPE), M. Freyberg (MPE)
Queries:	richard.saxton at sciops.esa.int
Posted:	18 Jan 2008;  14:39  UT
Subjects:	X-ray, Request for Observations, Transients

We report the detection of an X-ray transient, XMMSL1 J152835.4+593754,
at a position RA=15h28m35.4s, DEC=+59d37m54s (J2000, error radius 8")
by the XMM-Newton slew survey on December 21st 2007.    The count rate
is 0.6 c/s in the EPIC-pn camera (0.2-2 keV), which equates to a flux
28 times higher than the 2-sigma upper limit from the ROSAT All Sky 
Survey (RASS) at the same position.      

The source position is coincident, within the errors, with the high
proper   motion star, LSPM J1528+5937, (USNO B-1 1496-0226846, B=18.77,
V(est)=17.1,   R=15.7, I=13.3) whose J2000, Ep=J2000 position is   RA:
15 28 35.26 , Dec: +59 37 58.9      

The proper motion of LSPM J1528+5937 is dRA=-0.226 arcsec/yr,   dDec=0.047
arcsec/yr.      

We tentatively identify the X-ray flare with LSPM J1528+5937 and
encourage   follow-up observations. 

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