학술논문
Deep Optical Imaging of the COSMOS Field with Hyper Suprime-Cam Using Data from the Subaru Strategic Program and the University of Hawaii
Document Type
Working Paper
Author
Tanaka, Masayuki; Hasinger, Guenther; Silverman, John D.; Bickerton, Steven; Furusawa, Hisanori; Harikane, Yuichi; Hu, Esther; Ikeda, Hiroyuki; Li, Yanxia; McCracken, Henry J.; Price, Paul A.; Strauss, Michael A.; Koike, Michitaro; Komiyama, Yutaka; Mineo, Sogo; Miyazaki, Satoshi; Nishizawa, Atsushi J.; Takata, Tadafumi; Utsumi, Yousuke; Yamada, Yoshihiko; Yasuda, Naoki
Source
Subject
Language
Abstract
We present the deepest optical images of the COSMOS field based on a joint dataset taken with Hyper Suprime-Cam (HSC) by the HSC Subaru Strategic Program (SSP) team and the University of Hawaii (UH). The COSMOS field is one of the key extragalactic fields with a wealth of deep, multi-wavelength data. However, the current optical data are not sufficiently deep to match with, e.g., the UltraVista data in the near-infrared. The SSP team and UH have joined forces to produce very deep optical images of the COSMOS field by combining data from both teams. The coadd images reach depths of g=27.8, r=27.7, i=27.6, z=26.8, and y=26.2 mag at 5 sigma for point sources based on flux uncertainties quoted by the pipeline and they cover essentially the entire COSMOS 2 square degree field. The seeing is between 0.6 and 0.9 arcsec on the coadds. We perform several quality checks and confirm that the data are of science quality; ~2% photometry and 30 mas astrometry. This accuracy is identical to the Public Data Release 1 from HSC-SSP. We make the joint dataset including fully calibrated catalogs of detected objects available to the community at https://hsc-release.mtk.nao.ac.jp/.
Comment: 10 pages, 6 figures. Data available at https://hsc-release.mtk.nao.ac.jp/
Comment: 10 pages, 6 figures. Data available at https://hsc-release.mtk.nao.ac.jp/