Automated Extended Aperture Photometry of K2 Variable Stars

被引：6
作者：
Bodi, Attila [1 ,2 ,3 ]
Szabo, Pal [1 ,2 ]
Plachy, Emese [1 ,2 ,3 ]
Molnar, Laszlo [1 ,2 ,3 ]
Szabo, Robert [1 ,2 ,3 ]
机构：
[1] Eotvos Lorand Res Network ELKH, Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary
[2] MTA CSFK Lendulet Near Field Cosmol Res Grp, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary
[3] ELTE Eotvoss Lorand Univ, Inst Phys, 1117,Pazmany Peter Setany 1-A, Budapest, Hungary
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2022年 / 134卷 / 1031期
关键词：
D O I：
10.1088/1538-3873/ac4398
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Proper photometric data are challenging to obtain in the K2 mission of the Kepler space telescope due to strong systematics caused by the two-wheel-mode operation. It is especially true for variable stars wherein physical phenomena occur on timescales similar to the instrumental signals. We originally developed a method with the aim to extend the photometric aperture to be able to compensate the motion of the telescope which we named Extended Aperture Photometry (EAP). Here we present the outline of the automatized version of the EAP method, an open-source pipeline called autoEAP. We compare the light curve products to other photometric solutions for examples chosen from high-amplitude variable stars. In addition to the photometry, we developed a new detrending method, which is based on phase dispersion minimization and is able to eliminate long-term instrumental signals for periodic variable stars.
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页数：14
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