The discovery of the serendipitous X-ray pulsar SAX J1802.7-2017 from a BeppoSAX observation of GX 9+1

Details The discovery of the serendipitous X-ray pulsar SAX J1802.7-2017 from a BeppoSAX observation of GX 9+1 The discovery of the serendipitous X-ray pulsar SAX J1802.7-2017 from a BeppoSAX observation of GX 9+1

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.132..572a&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 132, p. 572-575.

Physics

Nuclear Physics

Scientific paper

We have discovered a new X-ray source, SAX J1802.7-2017, ~22' away from the bright X-ray source GX 9+1, during a BeppoSAX observation of this latter one on 2001 September 16-20. The count rate of SAX J1802.7-2017 is comparable to the background (~0.04 c/s) during the first 50 ks of the observation, then the count rate shows a large variability increasing up to ~0.28 c/s.
We have performed a temporal analysis finding that SAX J1802.7-2017 has a pulse period of ~139.61 s, a projected orbital separation axsini of 48+/-5 lt-s and an orbital period of 3.7+0.4-0.2 days, allowing to classify the new object as an X-ray pulsar.

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