XMMU J054134.7-682550 is a 61 s X-ray Pulsar with Cyclotron Features

Details XMMU J054134.7-682550 is a 61 s X-ray Pulsar with Cyclotron Features XMMU J054134.7-682550 is a 61 s X-ray Pulsar with Cyclotron Features

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atel.1176....1m&link_type=abstract

The Astronomer's Telegram, #1176

Astronomy and Astrophysics

Astronomy

5

X-Ray, Gamma Ray, Binaries, Neutron Stars, Pulsars, Transients

Scientific paper

Based on the recent report of activity from XMMU J054134.7-682550 (ATEL #1169), RXTE observed the source on 09 Aug 2007 at 03:35 UTC for about 3500 seconds. X-ray pulsations are clearly detected. The pulse period is 61.601 +/- 0.017 seconds, with a pulsed semi-amplitude of about 40%. There are no obvious signs of orbital Doppler modulation. Assuming this source is a Be star system having a giant, "Type II" outburst, the estimated orbital period is about 80 days - within a factor of 2 - based on a fit to the P_{spin} vs.

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