0520029

We propose to conduct extbf{fixed-time} observations for 2x2uninterrupted INTEGRAL orbits (2x 2x233=926 ks) of thegalactic microquasar SS433 in two consecutive primary orbital eclipses near the face-on disk precession phase of the source in October 2007. The main goal is phase-resolved hard X-ray spectroscopy of the primary orbital eclipse and study its highly variable form.The phase-resolved spectroscopy is crucial to study the structure and physical parameters of hot rarefied corona at the center of the supercritical accretion disk in SS433 discoverd by previous INTEGRAL observations. Precise form of the eclipse is neededto constrain binary mass ratio in this system which is still controversial. The proposal is not associated with the AO-5 Key Program. [truncated! Please see actual data for full text]我们提议针对银河微类星体SS 433，在2007年10月其盘面正对观测者的进动相位附近，于两次连续的主轨道食期间，开展**固定时长**的不间断INTEGRAL轨道观测，共包含2组、每组2个轨道的观测任务，总观测时长为2×2×233=926千秒（ks）。本观测提案的核心目标为对主轨道食开展相分辨硬X射线光谱学研究，并探究其高度可变的形态特征。该相分辨光谱学研究，对于解析此前INTEGRAL观测所发现的SS 433中超临界吸积盘中心处的高温稀薄冕层的结构与物理参数至关重要。精准确定该轨道食的具体形态，可为约束此系统中尚存争议的双星质量比提供关键依据。本提案不属于AO-5关键项目范畴。【文本已截断，请参阅完整原始数据以获取全部内容】