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A New X-ray Outburst of the HMXB Pulsar X0535+262

ATEL # 1725; Alan M. Levine and Ronald A. Remillard (MIT) for the RXTE team at GSFC and MIT
on 19 Sep 2008; 19:14 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Alan M. Levine (

Subjects: X-ray, Request for Observations, Binaries, Neutron Stars, Pulsars, Transients

The recurrent transient accreting X-ray pulsar X0535+262 has begun its first X-ray outburst observed with RXTE since a series of three closely spaced outbursts that ended in 2005. X0535+262 was first detected by the ASM in the current outburst on MJD 54721 (2008 September 12) at an average level of 21 (5) mCrab at 2-12 keV. The source intensity has averaged 33 (5) mCrab over the 6 days beginning with MJD 54722 and appears to be roughly stationary. While these numbers suggest that the source may reach a relatively small peak intensity in this outburst, we nonetheless urge followup observations with other instruments.

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R. E. Rutledge , Editor
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