利用LAMOST和Gaia改进Pan-STARRS光度定标

IF 8.6 1区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Astrophysical Journal Supplement Series Pub Date : 2023-09-28 DOI:10.3847/1538-4365/acee73
Kai Xiao, Haibo Yuan, Bowen Huang, Ruoyi Zhang, Lin Yang, Shuai Xu
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引用次数: 1

摘要

本文采用基于光谱学的恒星颜色回归(SCR)方法、基于光谱学的SCR方法和Gaia BP/RP合成光度法对Pan-STARRS1 (PS1)光度法进行了重新校准,校正了位置相关的系统误差。我们证实了所有灰色滤波器的星等偏移量在大尺度和小尺度上的显著空间变化。我们表明,当在14 '区域平均时,灰滤光片中的PS1光度校准精度约为5-7 mmag。我们注意到在银河面有一个更大的校准误差,高达0.04等,这可能是由于PS1星等在拥挤场中的系统误差造成的。三种方法的结果在1-2 mmag或更好的范围内是一致的。我们提供2D地图和Python包来校正PS1的位置相关震级偏移,这可以用于高精度调查,并作为校准其他调查的参考。
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Improvement of Pan-STARRS Photometric Calibration with LAMOST and Gaia
Abstract In this work, we perform the recalibration of Pan-STARRS1 (PS1) photometry by correcting for position-dependent systematic errors using the spectroscopy-based stellar color regression (SCR) method, the photometry-based SCR method, and the Gaia BP/RP synthetic photometry method. We confirm the significant large-scale and small-scale spatial variation of the magnitude offsets for all the grizy filters. We show that the PS1 photometric calibration precisions in the grizy filters are around 5–7 mmag when averaged over 14′ regions. We note a much larger calibration error up to 0.04 mag in the Galactic plane, which is probably caused by the systematic errors of the PS1 magnitudes in crowded fields. The results of the three methods are consistent with each other within 1–2 mmag or better for all the filters. We provide 2D maps and a Python package to correct for position-dependent magnitude offsets of PS1, which can be used for high-precision investigations and as a reference to calibrate other surveys.
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来源期刊
Astrophysical Journal Supplement Series
Astrophysical Journal Supplement Series 地学天文-天文与天体物理
CiteScore
14.50
自引率
5.70%
发文量
264
审稿时长
2 months
期刊介绍: The Astrophysical Journal Supplement (ApJS) serves as an open-access journal that publishes significant articles featuring extensive data or calculations in the field of astrophysics. It also facilitates Special Issues, presenting thematically related papers simultaneously in a single volume.
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