紫外成像望远镜自动流水线（UVIT）
An Automated Pipeline for Ultra-Violet Imaging Telescope (UVIT)
摘要：
我们描述了一个多功能的管道，用于处理由紫外成像望远镜（UVIT）上的印度多波长天文卫星AstroSat收集的数据。UVIT仪器进行同时天文成像，通过选定的过滤器/光栅在远紫外（FUV），近紫外和可见光（VIS）波段的目标圆形天空场（~ 0.5度直径）。该管道将紫外线信息技术原始格式的数据（1级）转换为紫外线天空图像（和无缝光栅光谱）以及天文学家随时可用的相关产品（2级）。主要产品包括强度图（光子到达率）、强度误差图和有效曝光图。该管道是开源的，用户可以通过许多可选参数进行广泛配置，并且其执行是完全自动化的。管道的关键成分包括-提取漂移在指向的航天器，和干扰指向由于内部运动;对每个光子在探测器中的测量位置应用各种校正-例如，相对于用于移位和相加操作的参考系的差分指向，望远镜和探测器的光学器件中的系统效应和伪影，天空上的曝光跟踪，对多集曝光的天空产品进行校准，以生成一个统一的集合和天体测量。每个加工阶段的操作和中间产品的详细日志可通过用户可选选项访问。虽然用户可以选择大量参数，但在UVIT有效载荷操作中心执行这一管道时使用了一套特征良好的标准默认设置，印度空间研究组织（印度空间研究组织）通过其ISSDC门户网站对选定产品进行存档和传播。
英文摘要：
We describe a versatile pipeline for processing the data collected by the Ultra-Violet Imaging Telescope (UVIT) on board Indian Multi-wavelength astronomical satellite AstroSat.The UVIT instrument carries out simultaneous astronomical imaging through selected filters / gratings in Far-Ultra-Violet (FUV), Near-Ultra-Violet & visible (VIS) bands of the targeted circular sky field (~ 0.5 deg dia). This pipeline converts the data (Level-1) emanating from UVIT in their raw primitive format supplemented by inputs from the spacecraft sub-systems into UV sky images (& slitless grating spectra) and associated products readily usable by astronomers (Level-2). The primary products include maps of Intensity (rate of photon arrival), error on Intensity and effective Exposure. The pipeline is open source, extensively user configurable with many selectable parameters and its execution is fully automated. The key ingredients of the pipeline includes - extraction of drift in pointing of the spacecraft, and disturbances in pointing due to internal movements; application of various corrections to measured position in the detector for each photon - e.g. differential pointing with respect to a reference frame for shift and add operation, systematic effects and artifacts in the optics of the telescopes and detectors, exposure tracking on the sky, alignment of sky products from multi-episode exposures to generate a consolidated set and astrometry. Detailed logs of operations and intermediate products for every processing stage are accessible via user selectable options. While large number of selectable parameters are available for the user, a well characterized standard default set is used for executing this pipeline at the Payload Operation Centre (POC) for UVIT and selected products are archived and disseminated by the Indian Space Research Organization (ISRO) through its ISSDC portal.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
