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28 April 2024 |
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Variability of X-ray pulsars in a hard energy band observed with INTEGRAL | | A.Lutovinov
; S.Tsygankov
; M.Revnivtsev
; M.Chernyakova
; I.Bikmaev
; S.Molkov
; R.Burenin
; N.Sakhibullin
; | | Date: |
16 Jul 2004 | | Subject: | astro-ph | | Affiliation: | 1,2), M.Chernyakova , I.Bikmaev (4,5), S.Molkov , R.Burenin , N.Sakhibullin (4,5) (1 - IKI, Moscow, Russia; 2 - MPA, Garching, Germany; 3 - ISDC, Versoix, Switzerland; 4 - KGU, Kazan, Russia; 5 - AST, Kazan, Russia | | Abstract: | We present the first results of the observations of the X-ray pulsars LMC X-4, 4U0352+309 and EXO1722-363 performed with the INTEGRAL observatory. The LMC X-4 was investigated during the whole superorbital cycle ($sim$30 days) and it was found that its period was not stable at this time scale. We detected a variable X-ray flux (18-60 keV) from the pulsar EXO1722-363, which could be connected with the orbital motion in the binary system. A more accurate position and the estimate of the orbital period for this source are reported. We also investigated a hard X-ray spectrum of 4U0352+309 (X Persei) measured with INTEGRAL and report the detection of the cyclotron absorption line at about 29 keV. | | Source: | arXiv, astro-ph/0407350 | | Services: | Forum | Review | PDF | Favorites | |
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