J-GEM follow-up observations of the gravitational wave source GW151226

Michitoshi Yoshida, Yousuke Utsumi, Nozomu Tominaga, Tomoki Morokuma, Masaomi Tanaka, Yuichiro Asakura, Kazuya Matsubayashi, Kouji Ohta, Fumio Abe, Sho Chimasu, Hisanori Furusawa, Ryosuke Itoh, Yoichi Itoh, Yuka Kanda, Koji S. Kawabata, Miho Kawabata, Shintaro Koshida, Naoki Koshimoto, Daisuke Kuroda, Yuki MoritaniKentaro Motohara, Katsuhiro L. Murata, Takahiro Nagayama, Tatsuya Nakaoka, Fumiaki Nakata, Tsubasa Nishioka, Yoshihiko Saito, Tsuyoshi Terai, Paul J. Tristram, Kenshi Yanagisawa, Naoki Yasuda, Mamoru Doi, Kenta Fujisawa, Akiko Kawachi, Nobuyuki Kawai, Yoichi Tamura, Makoto Uemura, Yoichi Yatsu

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 of the skymap with the MOA-red filter ∼2.5mon 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 (≥100Mpc) 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.

Original languageEnglish
Article number9
JournalPublications of the Astronomical Society of Japan
Volume69
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • Binaries: close
  • Black hole physics
  • Gravitational waves
  • Methods: observational
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Yoshida, M., Utsumi, Y., Tominaga, N., Morokuma, T., Tanaka, M., Asakura, Y., Matsubayashi, K., Ohta, K., Abe, F., Chimasu, S., Furusawa, H., Itoh, R., Itoh, Y., Kanda, Y., Kawabata, K. S., Kawabata, M., Koshida, S., Koshimoto, N., Kuroda, D., ... Yatsu, Y. (2017). J-GEM follow-up observations of the gravitational wave source GW151226. Publications of the Astronomical Society of Japan, 69(1), [9]. https://doi.org/10.1093/pasj/psw113