EXOSAT results on the X-ray burster 2S1254-690 |
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| Authors: | Thierry J -L Courvoisier Arvind N Parmar Tony Peacock |
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| Institution: | (1) Space Telescope European Coordinating Facility ESO, Karl-Schwarzschild-Str. 2, D-8046 Garching bei München, West Germany;(2) EXOSAT Observatory ESOC, Robert Bosch Strasse 5, D-6100 Darmstadt, West Germany;(3) Astrophysics Division, ESTEC, Postbus 299, NL-2200 AC Noordwijk, The Netherlands |
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| Abstract: | EXOSAT observations of 2S1254-690 in August 1984 have confirmed the presence of periodic dips in the X-ray intensity. These dips occurred with a period of 3.9 hours and last for about 50 minutes. During individual dips the observed X-ray flux oscillated several times between the quiescent level and an undetectable level on time scales varying from a few seconds to approximately 5 minutes. In addition, a second type one burst has been observed, with characteristics which are very similar to those observed earlier. In this paper we report the results of a 20 hour EXOSAT observation made in 1984 August 6th to 7th, and discuss some properties of the dips and of the burst.affiliated to the Astrophysics Division, Space Science Department, ESA |
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