3A 0535+262 in outburst
/ Authors
P. Kretschmar, K. Pottschmidt, C. Ferrigno, I. Kreykenbohm, A. Domingo, J. Wilms, R. Rothschild, W. Coburn, E. Kendziorra, R. Staubert
and 3 more authors
/ Abstract
The Be/X-ray binary 3A 0535+262 has the highest magnetic field determined by cyclotron line studies of all accreting X-ray pulsars, despite an open debate if the fundamental line was rather at ~50 or above 100 keV as observed by different instruments in past outbursts. The source went into quiescence for more than ten years since its last outbursts in 1994. Observing during a `normal' outburst August/September 2005 with Integral and RXTE we find a strong cyclotron line feature at ~45 keV and have for the first time since 1975 determined the low energy pulse profile.
Journal: arXiv: Astrophysics