搭载在神州二号飞船留轨舱上的超软X射线探测器——观测结果简介

A Brief Description of Observational Results from Supersoft X-ray Detector on Board Spacecraft Shenzhou-2

简要介绍搭载在神州二号飞船留轨舱上的超软X射线探测器的观测结果,它们涉及宇宙γ射线暴,太阳X射线暴,高能带电粒子和软X射线背景辐射,供分析、讨论和研究。

The observational results from super soft x-ray detector (SD) belong to the space astronomy sub-system onboard spacecraft Shenzhou-2 (SZ-2) are briefly described. Cosmic γ-ray bursts, solar x-ray bursts, high energy charged particles and soft x-ray background radiation are concerned. SD is a proportional counter with thin polypropylene foil window of 50mm diameter and operates in an energy range between 0.23 - 3.0keV divided into six energy channels. Two time resolutions are used: 40 ms for recording the burst event; 520ms when there are not trigger signal resulting from burst event. The light curves and energy spectra of two cosmic 7-ray bursts started at 010117/09:37:25.21UT and 010309/12:33:55.692 UT are shown in Fig. la - 2b. The results of two solar X-ray bursts started at 010406/19:14:09.11 UT and 010520/06:02:12.58UT are shown in Fig. 3a - 4b. SD was recording the ambient high energy charged particles when there were no burst events and its shutter of window was closed. 110 data sets of high energy charged particles along the orbit of spacecraft have been obtained. The variations of counting rate of such data are shown in Fig.6a, 6b, 8e, 8f and 7 as examples. More than 10 events of particle precipitation induced by solar proton events were also recorded, some such events are shown in Fig.6c-6f and 7. Some soft x-ray background radiation were obtained as shown in Fig.8a-8d when the shutter of window was opened; it is import for processing the data of burst events.