AI 中文总结
该研究开发了用于罗曼日冕仪的corgidrp数据处理管线，实现了满足阈值要求的天体测量校准，确保日冕仪能精确指向科学目标。
AI 中文摘要
南希·格蕾丝·罗曼空间望远镜将配备一台技术演示日冕仪，该仪器将突破当前系外行星高对比度成像的极限，达到10^-9的对比度。罗曼日冕仪社区参与计划已开发出corgidrp，这是一款基于Python的罗曼日冕仪数据处理管线，将执行日冕仪观测的必要数据处理和校准步骤。corgidrp中的天体测量校准功能，可通过表征关键探测器参数（视轴、板尺度、北角和光学畸变），帮助我们了解科学观测的天球角大小和距离尺度。测量这些天体测量校准产品不仅有助于理解数据的科学产出，更是我们首次将罗曼日冕仪精确指向科学目标的基础。本文描述了天体测量校准中采用的技术，并证明我们的算法满足技术演示阈值要求：（1）计算CGI EXCAM探测器中心的天球位置，精度优于30毫角秒；（2）计算相机轴的天球位置角，误差在0.3度以内。
英文摘要
The Nancy Grace Roman Space Telescope will be equipped with a Technology Demonstration Coronagraph Instrument that will push the current limits of high contrast imaging for exoplanets ($10^{-9}$ contrast). The Roman Coronagraph Community Participation Program has developed corgidrp, a python-based data reduction pipeline for the Roman Coronagraph Instrument that will perform essential data processing and calibration steps for coronagraphic observations. The astrometric calibration function within corgidrp allows us to understand the on-sky angular size and distance scale of science observations by characterizing essential detector parameters: boresight, plate scale, north angle, and optical distortion. Measuring these astrometric calibration products not only helps us understand the science output of our data, but it is what allows us to point the Roman coronagraph accurately at our science target in the first place. Here, we describe the techniques used within the astrometric calibration and demonstrate that our algorithm meets Technology Demonstration Threshold Requirements: (1) compute the on-sky location of the center of CGI EXCAM detector to better than 30 [mas] and (2) compute the on-sky position angles of the camera axes to within 0.3 [deg].
Comments9 pages, 4 figures. SPIE Astronomical Telescopes + Instrumentation: Space Telescopes and Instrumentation 2026: Optical, Infrared, and Millimeter Wave
