The on-site quality-assurance system for Hyper Suprime-Cam: OSQAH

Hisanori Furusawa, Michitaro Koike, Tadafumi Takata, Yuki Okura, Hironao Miyatake, Robert H. Lupton, Steven Bickerton, Paul A. Price, James Bosch, Naoki Yasuda, Sogo Mineo, Yoshihiko Yamada, Satoshi Miyazaki, Fumiaki Nakata, Shintaro Koshida, Yutaka Komiyama, Yousuke Utsumi, Satoshi Kawanomoto, Eric Jeschke, Junichi NoumaruKiaina Schubert, Ikuru Iwata, Francois Finet, Takuya Fujiyoshi, Akito Tajitsu, Tsuyoshi Terai, Chien Hsiu Lee

Research output: Contribution to journalArticlepeer-review

149 Scopus citations


We have developed an automated quick data analysis system for data quality assurance (QA) for Hyper Suprime-Cam (HSC). The system was commissioned in 2012-2014, and has been offered for general observations, including the HSC Subaru Strategic Program, since 2014 March. The system provides observers with data quality information, such as seeing, sky background level, and sky transparency, based on quick analysis as data are acquired. Quick-look images and validation of image focus are also provided through an interactive web application. The system is responsible for the automatic extraction of QA information from acquired raw data into a database, to assist with observation planning, assess progress of all observing programs, and monitor long-term efficiency variations of the instrument and telescope. Enhancements of the system are being planned to facilitate final data analysis, to improve the HSC archive, and to provide legacy products for astronomical communities.

Original languageEnglish (US)
Article numberS3
JournalPublications of the Astronomical Society of Japan
Issue numberSpecial Issue 1
StatePublished - Jan 1 2018

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Cosmology
  • Data analysis-methods
  • Observational-surveys
  • Observations-methods


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