INTEGRAL hard X-ray detection of HMXB GX 304-1 and H 1417-624

Astronomy and Astrophysics – Astronomy

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

Scientific paper

We report on the first detection of the Be star HMXBs GX 304-1 and H 1417-624 above 20 keV with the IBIS/ISGRI X-ray imager on board INTEGRAL. From 2008-06-24 to 2008-07-09, INTEGRAL performed monitoring observations of the Galactic plane around l=305 degrees for a total exposure time of 352 ksec. GX 304-1 was detected in all spacecraft revolutions, and shows brightening with time. H 1417-624 was detected only in revolution 699 and 700 (2008-07-04 to 2008-07-09).

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