双子座行星成像仪天体测量定标的修订
天体物理仪器与方法
2020-04-09 v2
摘要
我们提出了对双子座行星成像仪（GPI）天体测量定标的修订，该仪器旨在实现小角间距下的高对比度，以对邻近年轻恒星周围的亚恒星及行星质量伴星进行成像。我们发现了GPI数据处理流水线（DRP）中若干显著影响还原后GPI图像中北极角确定的问题。该误差除了在天顶距较小时对目标的位置角测量引入微小误差外，还导致了先前天体测量定标中的显著误差，影响了所有后续的天体测量。我们详细描述了这些问题及其修正方法。我们使用更新版本的DRP还原了自2014年仪器投入使用以来定期获取的定标双星GPI观测数据。将这些测量结果与Keck II望远镜上NIRC2仪器（一台具有优异天体测量定标的仪器）的观测进行比较，从而推导出GPI更新后的像元比例尺与北极偏移角。这一修订后的天体测量定标应用于GPI获取的所有测量，以进行精密天体测量定标。
引用
@article{arxiv.1910.08659,
title = {Revised Astrometric Calibration of the Gemini Planet Imager},
author = {Robert J. De Rosa and Meiji M. Nguyen and Jeffrey Chilcote and Bruce Macintosh and Marshall D. Perrin and Quinn Konopacky and Jason J. Wang and Gaspard Duchêne and Eric L. Nielsen and Julien Rameau and S. Mark Ammons and Vanessa P. Bailey and Travis Barman and Joanna Bulger and Tara Cotten and Rene Doyon and Thomas M. Esposito and Michael P. Fitzgerald and Katherine B. Follette and Benjamin L. Gerard and Stephen J. Goodsell and James R. Graham and Alexandra Z. Greenbaum and Pascale Hibon and Li-Wei Hung and Patrick Ingraham and Paul Kalas and James E. Larkin and Jérôme Maire and Franck Marchis and Mark S. Marley and Christian Marois and Stanimir Metchev and Maxwell A. Millar-Blanchaer and Rebecca Oppenheimer and David Palmer and Jennifer Patience and Lisa Poyneer and Laurent Pueyo and Abhijith Rajan and Fredrik T. Rantakyrö and Jean-Baptiste Ruffio and Dmitry Savransky and Adam C. Schneider and Anand Sivaramakrishnan and Inseok Song and Remi Soummer and Sandrine Thomas and J. Kent Wallace and Kimberly Ward-Duong and Sloane Wiktorowicz and Schuyler Wolff},
journal= {arXiv preprint arXiv:1910.08659},
year = {2020}
}
备注
36 pages, 17 figures, accepted for publication in the Journal of Astronomical Telescopes, Instruments, and Systems. Updated version includes revisions made during the referee process