کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1768307 | 1020220 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A puzzling event during the X-ray emission of the binary system GX 1+4
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
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![عکس صفحه اول مقاله: A puzzling event during the X-ray emission of the binary system GX 1+4 A puzzling event during the X-ray emission of the binary system GX 1+4](/preview/png/1768307.png)
چکیده انگلیسی
We report on a long X-ray observation of the the slow-rotating binary pulsar GX 1+4. BeppoSAX observed, in the 0.1-200 keV energy range, an event in which the source flux dropped for almost a day, and then recovered. During this event only the high-energy emission was found to be pulsed and the pulsations were shifted in phase of â¼0.2. The spectrum during the event was well fitted by a Compton-reflection model. A broad iron line at â¼6.55 keV was present outside of the event, where instead two narrow emission lines at â¼6.47 and â¼7.05 keV were detected. The pulse profile was highly variable as a function of both energy and time. We interpret this low-flux event as an occultation of the direct X-ray emission, due to the increase of a torus-like accretion disk; we then discuss similarities between this source and the recently discovered highly absorbed INTEGRAL sources.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 38, Issue 7, 2006, Pages 1453-1456
Journal: Advances in Space Research - Volume 38, Issue 7, 2006, Pages 1453-1456
نویسندگان
N. Rea, L. Stella, G.L. Israel, G. Matt, S. Zane, A. Segreto, T. Oosterbroek,