ROSAT archival observations of 1SAX J0054.9-7226 = 2E 0053.2-7242, a newly discovered X-ray pulsar in the SMC

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dc.creatorIsrael, G. L.
dc.creatorCampana, S.
dc.creatorCusumano, G.
dc.creatorFrontera, F.
dc.creatorOrlandini, M.
dc.creatorSantangelo, A.
dc.creatorStella, L.
dc.date1998-04-20
dc.date.accessioned2026-07-07T02:26:38Z
dc.date.available2026-07-07T02:26:38Z
dc.descriptionWe analysed 13 archival ROSAT PSPC and HRI observations which included the position of a newly discovered 59s X-ray pulsar in the Small Magellanic Cloud, 1SAX J0054.9-7226 = 2E 0053.2-7242. The source was detected three times between 1991 and 1996 at a luminosity level ranging from about 8 x 10^{34} - 4 x 10^{35} erg s^{-1} (0.1-2.4 keV). Highly significant pulsations at 59.072s were detected during the 1991 October 8-9 observation. The ROSAT period, together with those measured by RXTE and BeppoSAX yields a period derivative of Pdot = - 0.016 s yr^{-1}. A much more accurate source position (10 arcsec uncertainty) was obtained through the ROSAT HRI detection on 1996 April restricting to three m_V > 15.5 stars the likely counterpart of 1SAX J0054.9-7226 = 2E 0053.2-7242.
dc.description4 pages (figures included). Accepted for publication on A&A Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/9804186
dc.identifierhttp://arxiv.org/abs/astro-ph/9804186
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12351
dc.subjectAstrophysics
dc.titleROSAT archival observations of 1SAX J0054.9-7226 = 2E 0053.2-7242, a newly discovered X-ray pulsar in the SMC
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