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4U 1608-522 in X-ray outburst

ATEL # 1113; D. Palmer (LANL), S. D. Barthelmy (GSFC), L. Barbier (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), T. Strohmayer (GSFC), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU)
on 15 Jun 2007; 22:43 UT
Distributed as an Instant Email Notice (Transients)
Password Certification: David M. Palmer (

Subjects: X-ray, Binaries, Cataclysmic Variables, Neutron Stars

The Swift BAT instrument detects a new outburst of the LMXB transient 4U 1608-522, beginning around June 12 and still rising to a current level of 250 mCrab (15-50 keV) as of June 15. This is the first outburst of this source in nearly a year (ATEL #851, #855, #857, #858).

The BAT light curve can be viewed on the Swift/BAT Hard X-ray Transient Monitor page (ATEL #904)

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R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates