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Title: J-GEM follow-up observations of the gravitational wave source GW151226
Authors: Yoshida
Michitoshi
Utsumi
Yousuke
Tominaga
Nozomu
Morokuma
Tomoki
Tanaka
Masaomi
Asakura
Yuichiro
Matsubayashi  kyouindb  KAKEN_id
Kazuya
Ohta
Kouji
Abe
Fumio
Chimasu
Sho
Furusawa
Hisanori
Itoh
Ryosuke
Itoh
Yoichi
Kanda
Yuka
Kawabata
S., Koji
Kawabata
Miho
Koshida
Shintaro
Koshimoto
Naoki
Kuroda  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-7363-187X (unconfirmed)
Daisuke
Moritani
Motohara, Yuki
Kentaro
Murata
L., Katsuhiro
Nagayama
Takahiro
Nakaoka
Tatsuya
Nakata
Fumiaki
Nishioka
Tsubasa
Saito
Yoshihiko
Terai
Tsuyoshi
Tristram
J., Paul
Yanagisawa
Kenshi
Yasuda
Naoki
Doi
Mamoru
Fujisawa
Kenta
Kawachi
Akiko
Kawai
Nobuyuki
Tamura
Yoichi
Uemura
Makoto
Yatsu
Yoichi
Author's alias: 松林, 和也
Issue Date: Feb-2017
Publisher: Oxford University Press (OUP)
Journal title: Publications of the Astronomical Society of Japan
Volume: 69
Issue: 1
Thesis number: 9
Abstract: We report the results of optical–infrared follow-up observations of the gravitational wave (GW) event GW151226 detected by the Advanced LIGO in the framework of J-GEM (Japanese collaboration for Gravitational wave ElectroMagnetic follow-up). We performed wide-field optical imaging surveys with the Kiso Wide Field Camera (KWFC), Hyper Suprime-Cam (HSC), and MOA-cam3. The KWFC survey started at 2.26 d after the GW event and covered 778 deg² centered at the high Galactic region of the skymap of GW151226. We started the HSC follow-up observations from ∼12 d after the event and covered an area of 63.5 deg² of the highest probability region of the northern sky with limiting magnitudes of 24.6 and 23.8 for the i and z bands, respectively. MOA-cam3 covered 145 deg² f the skymap with the MOA-red filter ∼2.5 mon after the GW alert. The total area covered by the wide-field surveys was 986.5 deg². The integrated detection probability for the observed area was ∼29%. We also performed galaxy-targeted observations with six optical and near-infrared telescopes from 1.61 d after the event. A total of 238 nearby (≤100 Mpc) galaxies were observed with a typical I band limiting magnitude of ∼19.5. We detected 13 supernova candidates with the KWFC survey, and 60 extragalactic transients with the HSC survey. Two thirds of the HSC transients were likely supernovae and the remaining one third were possible active galactic nuclei. With our observational campaign, we found no transients that are likely to be associated with GW151226.
Rights: © The Author 2016. Published by Oxford University Press on behalf of the Astronomical Society of Japan. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
URI: http://hdl.handle.net/2433/235004
DOI(Published Version): 10.1093/pasj/psw113
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