New X-ray Activity from Aql X-1

Details New X-ray Activity from Aql X-1 New X-ray Activity from Aql X-1

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2742....1g&link_type=abstract

The Astronomer's Telegram, #2742

Astronomy and Astrophysics

Astronomy

X-Ray, Request For Observations, Binaries, Neutron Stars, Transients

Scientific paper

Recent MAXI/GSC and Swift/BAT data show a significant increase in X-ray activity. On 13 July 2010, the Swift/BAT count rate increased from quiescence to 0.0047 ± 0.0012 counts/sec, to 0.0073 ± 0.0010 on 14 July 2010, and to 0.0106 ± 0.0018 on 15 July 2010. This is an average increase of 0.003 counts/sec per day, and the flux has increased by 2.3 since 13 July 2010. The most recent observation is 5.9 sigma above the quiescent level. Between 12.5 July 2010 and 14.5 July 2010 The MAXI/GSC 2-20 keV count rate also appears to have increased from 0.024 ± 0.010 to 0.048 ± 0.012 counts/sec from, an increase in flux by a factor of 2. Optical and NIR observations are planned.

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