Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...338l..59s&link_type=abstract
Astronomy and Astrophysics, v.338, p.L59-L62 (1998)
Astronomy and Astrophysics
Astrophysics
11
X-Rays: Binaries, Individual (1Sax J0054.9-7226), X-Rays: Pulsars, Galaxies: Magellanic Clouds
Scientific paper
We report on the result of a BeppoSAX Target of Opportunity Observation of the hard pulsating X-ray source XTE J0055-724 = 1SAX J0054.9-7226, in the Small Magellanic Cloud (SMC). The source was detected by BeppoSAX at a flux level of ~ 2 * 10(-11) erg cm(-2) s(-1) (2-10 keV) and its position is consistent with that of the ROSAT PSPC source 1WGA J0054.9-7226 and the Einstein source 2E 0053.2-7242. Both these sources were known to possess a marked variability, on timescales ranging from months to years. The BeppoSAX energy spectrum of 1SAX J0054.0-7226 is hard and well modelled by an absorbed hard power-law model with a photon index ~ 0.81. BeppoSAX detected up to 40 keV the ~ 59 s pulsations originally discovered with by RXTE (Marshall & Lochner 1998a; Santangelo et al. 1998).
Cusumano Giancarlo
dal Fiume Daniele
Israel Gian Luca
Orlandini Mauro
Parmar Arvind N.
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