Swift/BAT detects renewed activity from 4U 1954+31

Details Swift/BAT detects renewed activity from 4U 1954+31 Swift/BAT detects renewed activity from 4U 1954+31

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1742....1k&link_type=abstract

The Astronomer's Telegram, #1742

Astronomy and Astrophysics

Astronomy

X-Ray, Binaries, Pulsars, Transients

Scientific paper

The Swift/BAT hard X-ray transient monitor reports increased activity in the 15-50 keV band for the symbiotic X-ray binary 4U 1954+31, which likely contains a pulsar with a 5-hour period (Corbet et al, ApJ 675, 1424, 2008). Starting on about 2008-08-09 (MJD 54687), the source has been steadily increasing in intensity from an undetectable level (one-sigma upper limit of 0.002 cts/cm2/sec or 8 mcrab) up to a current level of 0.013 ± 0.002 cts/cm2/sec (58 mcrab) on 2008-09-25.

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