0420104

We propose a Target of Opportunity Observation whenever one of the known pulsating bright transient sources enters an outburst. Part of the proposal are also the new bright pulsating X-ray transients that will be discovered by INTEGRAL or any other current X-ray mission and that do not belong to the Integral Core Programme. More specifically we propose two observations of 200 ks each (total 400 ks) to be performed at two different luminosity states following a strategy which depends on the type of the outburst. The key scientific objectives of the proposal are: the measurement of the spectral parameters of the continuum and of the Cyclotron Resonant Scattering (CRS) structures as a function of system luminosity to study the height and extension of the line forming region in response to the decrease of mass accretion rate the study of the energy-resolved pulse profiles as a function of the luminosity to test the geometry (fan/pencil) of the beam and of the B field he phase resolved measurement of the source spectral parameters for both the continuum emission and CRS harmonics. [truncated! Please see actual data for full text]

我们提出，当已知的脉动亮暂现源进入爆发阶段时，开展机会目标观测（Target of Opportunity Observation）。本提案同时涵盖由INTEGRAL或其他现役X射线任务发现的、不属于INTEGRAL核心计划的新型亮脉动X射线暂现源。具体而言，我们计划针对两种不同光度状态开展两次观测，每次时长200千秒（总计400千秒），观测策略将依据爆发类型而定。本提案的核心科学目标包括：测量连续谱与回旋共振散射（Cyclotron Resonant Scattering，CRS）结构的谱参数随源光度的变化关系，以研究吸积率下降时谱线形成区的高度与延展范围；研究能量分辨脉冲轮廓随光度的变化规律，以检验喷流的几何形态（扇束/铅笔束）与磁场特性；对连续谱辐射与CRS谐波分别开展相分辨的源谱参数测量。[内容已截断！请查阅完整数据以获取全文]