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A challenge to identify an optical counterpart of the gravitational wave event GW151226 with Hyper Suprime-Cam(dagger)
Utsumi, Yousuke1,2; Tominaga, Nozomu3,4; Tanaka, Masaomi5; Morokuma, Tomoki6; Yoshida, Michitoshi7; Asakura, Yuichiro8; Finet, Francois7; Furusawa, Hisanori5; Kawabata, Koji S.1; Liu, Wei1,9; Matsubayashi, Kazuya10; Moritani, Yuki4; Motohara, Kentaro6; Nakata, Fumiaki7; Ohta, Kouji11; Terai, Tsuyoshi7; Uemura, Makoto1; Yasuda, Naoki4
2018
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
ISSN0004-6264
Volume70Issue:1Pages:14
Corresponding AuthorUtsumi, Yousuke(youtsumi@stanford.edu)
AbstractWe present the results of detailed analysis of an optical imaging survey conducted using the Subaru/Hyper Suprime-Cam (HSC) that aimed to identify an optical counterpart to the gravitational wave event GW151226. In half a night, the i- and z-band imaging survey by HSC covered 63.5 deg(2) of the error region, which contains about 7% of the LIGO localization probability, and the same field was observed in three different epochs. The detectable magnitude of the candidates in a differenced image is evaluated as i similar to 23.2 mag for the requirement of at least two 5 sigma detections, and 1744 candidates are discovered. Assuming a kilonova as an optical counterpart, we compare the optical properties of the candidates with model predictions. A red and rapidly declining light curve condition enables the discrimination of a kilonova from other transients, and a small number of candidates satisfy this condition. The presence of stellar-like counterparts in the reference frame suggests that the surviving candidates are likely to be flare stars. The fact that most of those candidates are in the galactic plane, vertical bar b vertical bar< 5 degrees, supports this interpretation. We also check whether the candidates are associated with the nearby GLADE galaxies, which reduces the number of contaminants even with a looser color cut. When a better probability map (with localization accuracy of similar to 50 deg(2)) is available, kilonova searches of up to approximately 200Mpc will become feasible by conducting immediate follow-up observations with an interval of 3-6 d.
Keywordgravitational waves stars: black holes stars: neutron
DOI10.1093/pasj/psx125
WOS KeywordCOMPACT OBJECT MERGERS ; NEUTRON-STAR MERGERS ; NEWTON DEEP SURVEY ; GAMMA-RAY BURSTS ; LIGHT CURVES ; SPECTROSCOPY ; SUPERNOVAE ; DWARFS ; SXDS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000425504400003
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22263
Collection中国科学院紫金山天文台
Corresponding AuthorUtsumi, Yousuke
Affiliation1.Hiroshima Univ, Hiroshima Astrophys Sci Ctr, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 7398526, Japan
2.Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA
3.Konan Univ, Fac Sci & Engn, Dept Phys, 8-9-1 Okamoto, Kobe, Hyogo 6588501, Japan
4.Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Inst Adv Study, 5-1-5 Kashiwa, Chiba 2778583, Japan
5.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
6.Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan
7.Natl Astron Observ Japan, Subaru Telescope, 650 North Aohoku Pl, Hilo, HI 96720 USA
8.Nagoya Univ, Inst Space Earth Environm Res, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648601, Japan
9.Univ Chinese Acad Sci, Purple Mt Observ, 2 Beijing West Rd, Nanjing 210008, Jiangsu, Peoples R China
10.Natl Astron Observ Japan, Okayama Astrophys Observ, 3037-5 Honjou, Kamogatacho, Okayama 7190232, Japan
11.Kyoto Univ, Dept Astron, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto, Kyoto 6068502, Japan
Recommended Citation
GB/T 7714
Utsumi, Yousuke,Tominaga, Nozomu,Tanaka, Masaomi,et al. A challenge to identify an optical counterpart of the gravitational wave event GW151226 with Hyper Suprime-Cam(dagger)[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2018,70(1):14.
APA Utsumi, Yousuke.,Tominaga, Nozomu.,Tanaka, Masaomi.,Morokuma, Tomoki.,Yoshida, Michitoshi.,...&Yasuda, Naoki.(2018).A challenge to identify an optical counterpart of the gravitational wave event GW151226 with Hyper Suprime-Cam(dagger).PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,70(1),14.
MLA Utsumi, Yousuke,et al."A challenge to identify an optical counterpart of the gravitational wave event GW151226 with Hyper Suprime-Cam(dagger)".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 70.1(2018):14.
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