Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky
From the experiences learned in three decades of exoplanet search, wide-field transit surveys have proven to be one of the most effective ways to detect exoplanets. Wide field of view, however, suffers from high false-positive rates caused by blended eclipsing binaries. The chromaticity in eclipse d...
Published in: | The Astronomical Journal |
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American Astronomical Society
2020
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Online Access: | http://hdl.handle.net/1959.3/455034 https://doi.org/10.3847/1538-3881/ab7449 |
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ftswinburne:tle:850cc1f8-4fbe-42bc-9107-b8ab21718dab:28f49f06-0da8-44be-9edc-ad1dd0a9c582:1 2023-05-15T13:33:11+02:00 Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky Zhu, Jiapeng Zhang, Hui Liang, En-Si Yu, Zhouyi Yang, Ming Zhou, Ji-lin Cui, Xiangqun Du, Fujia Gong, Xuefei Gu, Bozhong Hu, Lei Jiang, Peng Liu, Huigen Li, Xiaoyan Li, Zhengyang Mould, Jeremy Sun, Tianrui Suntzeff, Nicholas B. Tao, Charling Tian, Qiguo Uddin, Syed A. Wang, Lifan Wang, Songhu Wang, Xiaofeng Wei, Peng Wright, Duncan Wittenmyer, Robert A. Xu, Lingzhe Yang, Shihai Yuan, Xiangyan Zhou, Hongyan Zhu, Zhenxi Lu, Hongke Swinburne University of Technology 2020 http://hdl.handle.net/1959.3/455034 https://doi.org/10.3847/1538-3881/ab7449 unknown American Astronomical Society http://hdl.handle.net/1959.3/455034 https://doi.org/10.3847/1538-3881/ab7449 Copyright © 2020 The American Astronomical Society. All rights reserved. The Astronomical Journal, Vol. 159, no. 4 (Mar 2020), article no. 172 Journal article 2020 ftswinburne https://doi.org/10.3847/1538-3881/ab7449 2020-04-20T22:25:35Z From the experiences learned in three decades of exoplanet search, wide-field transit surveys have proven to be one of the most effective ways to detect exoplanets. Wide field of view, however, suffers from high false-positive rates caused by blended eclipsing binaries. The chromaticity in eclipse depth is an effective feature to distinguish low-depth eclipsing binaries from transiting exoplanets, making multiple-band photometry follow-up advantageous before a target is passed onto more expensive spectroscopic follow-up. Moreover, a multiple-band photometric survey is itself a powerful method to find and vet planetary candidates and narrow down the candidate list of high-priority targets. In this work, we report the first results of a dual-band (Sloan-g and -i) wide-field photometry survey-the Chinese Small Telescope ARray II (CSTAR-II), an updated version of the original CSTAR. As a key component of the Chinese Exoplanet Searching Program from Antarctica, CSTAR-II has been tested thoroughly at a remote arctic site near Mohe during the winter of 2014. In total, 13,531 light curves with the best overall photometric precision of similar to 3 mmag were extracted from 7721 stars in the Sloan-g and -i bands. Using a robust method, we have detected 63 variables, of which 48 are newly discovered. The dual-band photometric results as well as the stellar properties of the detected sources are provided in this work. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Swinburne University of Technology: Swinburne Research Bank Antarctic Arctic The Antarctic The Astronomical Journal 159 4 172 |
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collection |
Swinburne University of Technology: Swinburne Research Bank |
op_collection_id |
ftswinburne |
language |
unknown |
description |
From the experiences learned in three decades of exoplanet search, wide-field transit surveys have proven to be one of the most effective ways to detect exoplanets. Wide field of view, however, suffers from high false-positive rates caused by blended eclipsing binaries. The chromaticity in eclipse depth is an effective feature to distinguish low-depth eclipsing binaries from transiting exoplanets, making multiple-band photometry follow-up advantageous before a target is passed onto more expensive spectroscopic follow-up. Moreover, a multiple-band photometric survey is itself a powerful method to find and vet planetary candidates and narrow down the candidate list of high-priority targets. In this work, we report the first results of a dual-band (Sloan-g and -i) wide-field photometry survey-the Chinese Small Telescope ARray II (CSTAR-II), an updated version of the original CSTAR. As a key component of the Chinese Exoplanet Searching Program from Antarctica, CSTAR-II has been tested thoroughly at a remote arctic site near Mohe during the winter of 2014. In total, 13,531 light curves with the best overall photometric precision of similar to 3 mmag were extracted from 7721 stars in the Sloan-g and -i bands. Using a robust method, we have detected 63 variables, of which 48 are newly discovered. The dual-band photometric results as well as the stellar properties of the detected sources are provided in this work. |
author2 |
Swinburne University of Technology |
format |
Article in Journal/Newspaper |
author |
Zhu, Jiapeng Zhang, Hui Liang, En-Si Yu, Zhouyi Yang, Ming Zhou, Ji-lin Cui, Xiangqun Du, Fujia Gong, Xuefei Gu, Bozhong Hu, Lei Jiang, Peng Liu, Huigen Li, Xiaoyan Li, Zhengyang Mould, Jeremy Sun, Tianrui Suntzeff, Nicholas B. Tao, Charling Tian, Qiguo Uddin, Syed A. Wang, Lifan Wang, Songhu Wang, Xiaofeng Wei, Peng Wright, Duncan Wittenmyer, Robert A. Xu, Lingzhe Yang, Shihai Yuan, Xiangyan Zhou, Hongyan Zhu, Zhenxi Lu, Hongke |
spellingShingle |
Zhu, Jiapeng Zhang, Hui Liang, En-Si Yu, Zhouyi Yang, Ming Zhou, Ji-lin Cui, Xiangqun Du, Fujia Gong, Xuefei Gu, Bozhong Hu, Lei Jiang, Peng Liu, Huigen Li, Xiaoyan Li, Zhengyang Mould, Jeremy Sun, Tianrui Suntzeff, Nicholas B. Tao, Charling Tian, Qiguo Uddin, Syed A. Wang, Lifan Wang, Songhu Wang, Xiaofeng Wei, Peng Wright, Duncan Wittenmyer, Robert A. Xu, Lingzhe Yang, Shihai Yuan, Xiangyan Zhou, Hongyan Zhu, Zhenxi Lu, Hongke Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
author_facet |
Zhu, Jiapeng Zhang, Hui Liang, En-Si Yu, Zhouyi Yang, Ming Zhou, Ji-lin Cui, Xiangqun Du, Fujia Gong, Xuefei Gu, Bozhong Hu, Lei Jiang, Peng Liu, Huigen Li, Xiaoyan Li, Zhengyang Mould, Jeremy Sun, Tianrui Suntzeff, Nicholas B. Tao, Charling Tian, Qiguo Uddin, Syed A. Wang, Lifan Wang, Songhu Wang, Xiaofeng Wei, Peng Wright, Duncan Wittenmyer, Robert A. Xu, Lingzhe Yang, Shihai Yuan, Xiangyan Zhou, Hongyan Zhu, Zhenxi Lu, Hongke |
author_sort |
Zhu, Jiapeng |
title |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_short |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_full |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_fullStr |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_full_unstemmed |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_sort |
exoplanets in the antarctic sky. iv. dual-band photometry of variables found by the cstar-ii commissioning survey at the north sky |
publisher |
American Astronomical Society |
publishDate |
2020 |
url |
http://hdl.handle.net/1959.3/455034 https://doi.org/10.3847/1538-3881/ab7449 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_source |
The Astronomical Journal, Vol. 159, no. 4 (Mar 2020), article no. 172 |
op_relation |
http://hdl.handle.net/1959.3/455034 https://doi.org/10.3847/1538-3881/ab7449 |
op_rights |
Copyright © 2020 The American Astronomical Society. All rights reserved. |
op_doi |
https://doi.org/10.3847/1538-3881/ab7449 |
container_title |
The Astronomical Journal |
container_volume |
159 |
container_issue |
4 |
container_start_page |
172 |
_version_ |
1766039330642460672 |