Swift/BAT detects increased hard X-ray activity from GX 304-1

Details Swift/BAT detects increased hard X-ray activity from GX 304-1 Swift/BAT detects increased hard X-ray activity from GX 304-1

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2538....1k&link_type=abstract

The Astronomer's Telegram, #2538

Astronomy and Astrophysics

Astronomy

2

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

Scientific paper

The Swift/BAT hard X-ray transient monitor reports increased activity in the 15-50 keV band for the transient pulsar and Be/X-ray binary and HMXB GX 304-1. Starting on 21-Mar-2010 (MJD 55276), the source has increased 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 0.036 ± 0.002 cts/cm2/sec (160 mcrab) on 05-Apr-2010. This is the highest rate seen in the BAT monitor since the peak two days of its outburst in Nov-2009 (Yamamoto et al, ATel #2297) and the longest sustained outburst seen from this source since the start of the Swift mission in Nov-2004.

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