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• W1672371570 abstract "We report the results of a 1998 July BeppoSAX observation of a field in the Small Magellanic Cloud which led to the discovery of ~345 s pulsations in the X-ray flux of SAX J0103.2-7209. The BeppoSAX X-ray spectrum is well fitted by an absorbed power law with a photon index of ~1.0 plus a blackbody component with kT = 0.11 keV. The unabsorbed luminosity in the 2-10 keV energy range is ~1.2 × 1036 ergs s-1. In a very recent Chandra observation, the 345 s pulsations are also detected. The available period measurements provide a constant period derivative of -1.7 s yr-1 over the last 3 years, making SAX J0103.2-7209 one of the most rapidly spinning up X-ray pulsars known. The BeppoSAX position (30'' uncertainty radius) is consistent with that of the Einstein source 2E 0101.5-7225 and the ROSAT source RX J0103.2-7209. This source was detected at a luminosity level of a few times 1035-1036 ergs s-1 in all data sets of past X-ray missions since 1979. The ROSAT HRI and Chandra positions are consistent with that of a mV = 14.8 Be spectral-type star already proposed as the likely optical counterpart of 2E 0101.5-7225. We briefly report and discuss photometric and spectroscopic data carried out at the ESO telescopes 2 days before the BeppoSAX observation. We conclude that SAX J0103.2-7209 and 2E 0101.5-7225 are the same source: a relatively young and persistent X-ray pulsar in the SMC." @default.
• W1672371570 created "2016-06-24" @default.
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• W1672371570 date "2000-03-10" @default.
• W1672371570 modified "2023-09-26" @default.
• W1672371570 title "[CSC][ITAL]BeppoSAX[/ITAL][/CSC] and [ITAL]Chandra[/ITAL] Observations of SAX J0103.2−7209 = 2E 0101.5−7225: A New Persistent 345 Second X-Ray Pulsar in the Small Magellanic Cloud" @default.
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• W1672371570 doi "https://doi.org/10.1086/312546" @default.
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