The Subaru COSMOS 20: Subaru optical imaging of the HST COSMOS field with 20 filters

Yoshiaki Taniguchi, Masaru Kajisawa, Masakazu A.R. Kobayashi, Yasuhiro Shioya, Tohru Nagao, Peter L. Capak, Herve Aussel, Akie Ichikawa, Takashi Murayama, Nick Z. Scoville, Olivier Ilbert, Mara Salvato, David B.B. S, Bahram Mobasher, Satoshi Miyazaki, Yutaka Komiyama, Olivier Le Fèvre, Lidia Tasca, Simon Lilly, Marcella CarolloAlvio Renzini, Michael Rich, Eva Schinnerer, Norio Kaifu, Hiroshi Karoji, Nobuo Arimoto, Sadanori Okamura, Kouji Ohta, Kazuhiro Shimasaku, Tomoki Hayashino

Research output: Contribution to journalArticle

29 Citations (Scopus)


We present both the observations and the data reduction procedures of the Subaru COSMOS 20 project, an optical imaging survey of the HST COSMOS field, carried out by using Suprime-Cam on the Subaru Telescope with the following 20 optical filters: six broad-b and (B, g′, V, r′, i′, and z′), two narrow-b and (NB711 and NB816), and 12 intermediate-b and filters (IA427, IA464, IA484, IA505, IA527, IA574, IA624, IA679, IA709, IA738, IA767, and IA827). Part of this project is described in Taniguchi et al. (2007, ApJS, 172, 9) and Capak et al. (2007, ApJS, 172, 99) for the six broad-b and and one narrow-b and (NB816) filter data. In this paper, we present details of the observations and data reduction for the remaining 13 filters (the 12 IA filters and NB711). In particular, we describe the accuracy of both the photometry and astrometry in all the filter b and s. We also present the optical properties of the Suprime-Cam IA filter system in appendices.

Original languageEnglish
Article number104
JournalPublications of the Astronomical Society of Japan
Issue number6
Publication statusPublished - 2015 Jan 30


  • methods: observational
  • surveys
  • techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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