Subaru / Hyper Suprime-Cam image for the optical follow-up to GW170817

J-GEM conducted Subaru / Hyper Suprime-Cam imaging observation for an electromagnetic counterpart to GW170817 (Tominaga et al. submitted). In this web page, we release interactive map of the surveyed image in collaboration with NAOJ / HSC project. Let's experience feeling of a GW hunter!

How to

Let's search the optical counterpart! You can use the information of the probability map provided by LIGO/Virgo.

Do you find it? Your answer can be confirmed if you click GW170817 from the "bookmarks" menu.

Advanced

If you find the optical counterpart, you should check variability. By hitting Shift+g, the image is changed to images obtained in 8/18, 19, 25, 27, accordingly.

Q&A

  • Q: How do astronomers find it?
  • A: We are also struggling. Our strategy focuses on transient located around galaxies in the nearby galaxy catalog GLADE using the 3D probaility map. (see Tominaga et al. (submitted) and Utsumi et al. (2017b) for the detail)
  • Q: How do I zoom-in/-out?
  • A: Using Mouse scroll, like Google Map.
  • Q: Can I play the map with my smartphone?
  • A: There are several limitations, but you can view the map itself.
  • Q: Can I view the map with Safari?
  • A: Sorry for the inconvenience. Google Chrome is recommended.

References

  • Utsumi et al. (2017a); PASJ; J-GEM observations of an electromagnetic counterpart to the neutron star merger GW170817
  • Tanaka et al. (2017); PASJ; Kilonova from post-merger ejecta as an optical and near-infrared counterpart of GW170817
  • Tominaga et al. (submitted); PASJ; Subaru Hyper Suprime-Cam Survey for An Optical Counterpart of GW170817
  • LIGO Scientific Collaboration et al. (2017); ApJL; Multi-messenger Observations of a Binary Neutron Star Merger
  • Abbott et al. (2017); PRL; GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
  • Utsumi et al. (2017b); PASJ; A Challenge to Identify an Optical Counterpart of the Gravitational Wave Event GW151226 with Hyper Suprime-Cam

Acknowledgement

This work was supported by MEXT KAKENHI (JP17H06363, JP15H00788, JP24103003, JP10147214, JP10147207) and JSPS KAKENHI (JP16H02183, JP15H02075, JP15H02069, JP26800103, JP25800103), the research grant program of the Toyota Foundation (D11-R-0830), the nat- ural science grant of the Mitsubishi Foundation, the research grant of the Yamada Science Foundation, the National Institute of Natural Sciences (NINS) program for cross-disciplinary sci- ence study, Inoue Science Research Award from Inoue Foundation for Science, Optical & Near-Infrared Astronomy Inter-University Cooperation Program from the MEXT, and the National Research Foundation of South Africa. This work is based on data col- lected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan, NINS.

本プロジェクトは、以下の研究プロジェクトの一部です。新学術領域研究重力波天体の多様な観測による宇宙物理学の新展開 "New Development in Astrophysics through Multimessenger Observationsof Gravitational Wave Sources"（平成24年度－28年度　研究代表：中村卓史）
管理者: youtsumi@hiroshima-u.ac.jp