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U 1145-619

Abstract:

RB Wilson, MH Finger, M. Stollberg, TA Prince, JM Grunsfeld, BA Harmon, and SN Zhang report for the Compton Gamma Ray Observatory BATSE team:" An outburst from an x-ray pulsar is currently being observed. Pulsations were first detected on Mar. 12.5 UT. The measured barycentric pulse period was 293.4464+/-0.0016 s on Mar. 19.0. The location, determined on Mar. 19 using earth-occultation mapping, is RA= 11h48m. 6, Decl.=-62o03'(equinox 2000.0), with an error radius of 0.2 deg. This location is consistent with either of the transient x-ray binary systems 4U 1145-619 or 1E 1145.1-6141. Based on previously reported periods of 292 and 297 s, respectively, the source is most likely 4U 1145-619. The period rate of change measured between Mar. 17 and 21 was (-2.43+/-0.34) x 10E-7. The pulse shape averaged over Mar. 16-20 consists of a narrow peak with a phase width of about 0.35, immediately …

Año de publicación:

1994

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        Contribuidores:

        Israel Jacob Sánchez DuranIsrael Jacob Sánchez Duran