2000ApJ...543L..73N -
Astrophys. J., 543, L73-L76 (2000/November-1)
Broadband observations of the new X-ray burster SAX J1747.0-2853 during the 1998 march outburst.
NATALUCCI L., BAZZANO A., COCCHI M., UBERTINI P., HEISE J., KUULKERS E. and IN'T ZAND J.J.M.
Abstract (from CDS):
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 0°.5 off the Galactic nucleus. A total of 14 type I X-ray bursts were detected in spring of 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 ∼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 7.2x104 s. The source persistent luminosity was 2.6x1036 ergs.s–1 in the 2-10 keV energy range. The broadband 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≃1023 cm–2) and with clear evidence for an absorption edge at ∼7 keV. A soft thermal component is also observed, which can be described by single-temperature blackbody emission at ∼0.6 keV.
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Journal keyword(s):
Stars: Binaries: Close - Stars: Individual: Alphanumeric: SAX J1747.0-2853 - X-Rays: Bursts
Simbad objects:
6
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