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Another outburst from A0535+26 is beginning

ATEL # 2705; Ascension Camero-Arranz (FECYT), Mark H. Finger (USRA), Colleen Wilson-Hodge (NASA/MSFC) and Peter Jenke (ORAU) on behalf of the Fermi/GBM Pulsar and Occultation Project teams
on 29 Jun 2010; 18:14 UT
Distributed as an Instant Email Notice (Transients)
Password Certification: Ascension Camero-Arranz (

Subjects: X-ray, Gamma Ray, Binaries, Pulsars, Transients
Referred to by ATEL #: 2754, 2798

The Be/X-ray binary A0535+26 is currently being detected with Fermi/GBM. It was initially detected in pulsations on June 23, 2010, 20 days before the next periastron passage. The source was initially detected with Earth occultations on June 25 with a flux of about 150+/-40 mcrab (12-25 keV). The last detection before the current observations was during the previous 111.1 day orbital cycle (ATel #2541).

The Fermi/GBM Pulsar and Earth Occultation Projects

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