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23 April 2024 |
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Wide band observations of the new X-ray burster SAX J1747.0-2853 during the March 1998 outburst | | L. Natalucci
; A. Bazzano
; M. Cocchi
; P. Ubertini
; J. Heise
; E. Kuulkers
; J.J.M. in ’t Zand
; | | Date: |
1 Sep 2000 | | Subject: | astro-ph | | Affiliation: | Istituto di Astrofisica Spaziale/CNR, Roma, Italy, Space Research Organization Netherlands, Utrecht, Netherlands | | Abstract: | We report on our discovery and follow-up observations of the X-ray source SAX J1747.0-2853 detected in outburst on 1998, March 10 with the BeppoSAX Wide Field Cameras in the energy range 2-28 keV. The source is located about half degree off the Galactic Nucleus. A total of 14 type-I X-ray bursts were detected in Spring 1998, thus identifying the object as a likely low-mass X-ray binary harboring a weakly magnetized neutron star. Evidence for photospheric radius expansion is present in at least one of the observed bursts, leading to an estimate of the source distance of about 9 kpc. We performed a follow-up target of opportunity observation with the BeppoSAX Narrow Field Instruments on March 23 for a total elapsed time of 72 ks. The source persistent luminosity was 2.6x10^36 erg/s in the 2-10 keV energy range. The wide band spectral data (1-200 keV) are consistent with a remarkable hard X-ray spectrum detected up to 150 keV, highly absorbed at low energies (Nh of the order of 10^23 cm^-2) and with clear evidence for an absorption edge near 7 keV. A soft thermal component is also observed, which can be described by single temperature blackbody emission at about 0.6 keV. | | Source: | arXiv, astro-ph/0009013 | | Services: | Forum | Review | PDF | Favorites | |
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