Vela X-1 in highly active hard X-ray state

Details Vela X-1 in highly active hard X-ray state Vela X-1 in highly active hard X-ray state

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1782....1s&link_type=abstract

The Astronomer's Telegram, #1782

Astronomy and Astrophysics

Astronomy

2

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

Scientific paper

The current pointing of the AGILE mission at (l,b)=(256,-20), started on 10th October 2008, includes the Vela region. In particular, Vela X-1 lies at approximately 25 degrees off-axis. Between MJD 54750 and 54752 (October 11-13) this source was detected by SuperAGILE with a flux varying in the range 250 mCrab - 1 Crab in 20-60 keV. Starting on MJD 54752.5 the flux showed a large and intense flare lasting approximately 12 hours and peaking at 2.3 Crab (AGILE orbit - 90 minutes - average), with a rise time of about 7 hours.

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