Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-11-20
Astronomy and Astrophysics
Astrophysics
9 pages, 5 figures, accepted for ApJ
Scientific paper
10.1086/308648
The Low Mass X-ray Binary (LMXB) X1822-330 in NGC 6652 is one of 12 bright, or transient, X-ray sources to have been discovered in Globular Clusters. We report on a serendipitous ASCA observation of this Globular Cluster LMXB, during which a Type I burst was detected and the persistent, non-burst emission of the source was at its brightest level recorded to date. No orbital modulation was detected, which argues against a high inclination for the X1822-330 system. The spectrum of the persistent emission can be fit with a power law plus a partial covering absorber, although other models are not ruled out. Our time-resolved spectral analysis through the burst shows, for the first time, clear evidence for spectral cooling from kT=2.4+/-0.6 keV to kT=1.0+/0.1 keV during the decay. The measured peak flux during the burst is ~10% of the Eddington luminosity for a 1.4 Msun neutron star. These are characteristic of a Type I burst, in the context of the relatively low quiescent luminosity of X1822-330.
Mukai Koji
Smale Alan P.
No associations
LandOfFree
The Low-Mass X-ray Binary X1822-330 in the Globular Cluster NGC 6652: A Serendipitous ASCA Observation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Low-Mass X-ray Binary X1822-330 in the Globular Cluster NGC 6652: A Serendipitous ASCA Observation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Low-Mass X-ray Binary X1822-330 in the Globular Cluster NGC 6652: A Serendipitous ASCA Observation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-445558