Outburst of Millisecond X-ray Pulsar XTE J1751-305
ATel #1045; C. B. Markwardt (CRESST/U. Maryland/NASA/GSFC), J. H. Swank (NASA/GSFC)
on 5 Apr 2007; 00:46 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Craig B. Markwardt (craigm@lheamail.gsfc.nasa.gov)
Subjects: X-ray, Request for Observations, Neutron Star, Transient, Pulsar
In galactic bulge monitoring observations on 04 Apr 2007 17:30 UT, the
RXTE PCA detected a source consistent with the position of XTE
J1751-305. This source is a millisecond X-ray pulsar with a 435 Hz
pulse period, which was last reported active in 2005 by INTEGRAL
(Grebenev et al. 2005, ATEL #446).
The measured flux was about 10 mCrab (2-10 keV). No pulsations were
obvious in the brief (~50 second) scans over the source. However, it
is not trivial to set a realistic upper limit to the pulsed fraction.
Additional RXTE observations are being planned.
