INTEGRAL Observations of Activity in EXO 2030+375

Details INTEGRAL Observations of Activity in EXO 2030+375 INTEGRAL Observations of Activity in EXO 2030+375

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atel..868....1m&link_type=abstract

The Astronomer's Telegram, #868

Astronomy and Astrophysics

Astronomy

4

X-Ray, Binaries, Neutron Stars

Scientific paper

The Be/neutron star binary EXO 2030+375 was in the field of view of INTEGRAL from July 26 at 6:00 UT to July 27 at 11:56 UT during a target of opportunity observation of Cyg X-3 consisting of 50 pointings of 2 ksec. The major outburst of the source reported by Corbet & Levine (ATel #843) and by Krimm et al. (ATel #861) is found to be still on-going with no sign of fading. The table below summarizes the count rates obtained in single pointings (For JEM-X 1 considering only results for source off-axis angles below 3 degrees):

Instrument	Energy band	Rate (min-max)	1 Crab
JEM-X 1	3-10 keV	41-47 cts/s	65 cts/s
JEM-X 1	10-20 keV	21-25 cts/s	21 cts/s
IBIS/ISGRI	20-40 keV	95-113 cts/s	109 cts/s
IBIS/ISGRI	40-80 keV	26-31 cts/s	62 cts/s

We note that the source reached the 1 Crab flux level around about 20 keV.

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