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A new bursting X-ray transient: SAX J1750.8-2900 | | L. Natalucci
; R. Cornelisse
; A. Bazzano
; M. Cocchi
; P. Ubertini
; J. Heise
; J.J.M. in ’t Zand
; E. Kuulkers
; | | Date: |
21 Jul 1999 | | Subject: | astro-ph | | Affiliation: | 2,3), A. Bazzano , M. Cocchi , P. Ubertini , J. Heise , J.J.M. in ’t Zand , E. Kuulkers (2,3) ( Istituto di Astrofisica Spaziale del CNR, Roma Space Research Organization Netherlands, Utrecht, Astronomical Institute, Utrecht University | | Abstract: | We have analysed in detail the discovery measurements of the X-ray burster SAX J1750.8-2900 by the Wide Field Cameras on board BeppoSAX in spring 1997, at a position ~1.2 degrees off the Galactic Centre. The source was in outburst on March 13th when the first observation started and showed X-ray emission for ~ 2 weeks. A total of 9 bursts were detected, with peak intensities varying from ~ 0.4 to 1.0 Crab in the 2-10 keV range. Most bursts showed a fast rise time (~ 1s), an exponential decay profile with e-folding time of ~ 5s, spectral softening during decay, and a spectrum which is consistent with few keV blackbody radiation. These features identify them as type-I X-ray bursts of thermonuclear origin. The presence of type-I bursts and the source position close to the Galactic Centre favours the classification of this object as a neutron star low mass X-ray binary. X-ray emission from SAX J1750.8-2900 was not detected in the previous and subsequent Galactic bulge monitoring, and the source was never seen bursting again. | | Source: | arXiv, astro-ph/9907296 | | Services: | Forum | Review | PDF | Favorites | |
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