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arXiv · 2107.00136

The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey

Xiangchong Li·Hironao Miyatake·Wentao Luo·Surhud More·Masamune Oguri·Takashi Hamana·Rachel Mandelbaum·Masato Shirasaki·Masahiro Takada·Robert Armstrong·Arun Kannawadi·Satoshi Takita·Satoshi Miyazaki·Atsushi J. Nishizawa·Andrés A. Plazas Malagón·Michael A. Strauss·Masayuki Tanaka·Naoki Yoshida
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Abstract

We present the galaxy shear catalog that will be used for the three-year cosmological weak gravitational lensing analyses using data from the Wide layer of the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) Survey. The galaxy shapes are measured from the $i$-band imaging data acquired from 2014 to 2019 and calibrated with image simulations that resemble the observing conditions of the survey based on training galaxy images from the Hubble Space Telescope in the COSMOS region. The catalog covers an area of 433.48 deg$^2$ of the northern sky, split into six fields. The mean $i$-band seeing is 0.59 arcsec. With conservative galaxy selection criteria (e.g., $i$-band magnitude brighter than 24.5), the observed raw galaxy number density is 22.9 arcmin$^{-2}$, and the effective galaxy number density is 19.9 arcmin$^{-2}$. The calibration removes the galaxy property-dependent shear estimation bias to a level: $|δm|<9\times 10^{-3}$. The bias residual $δm$ shows no dependence on redshift in the range $0 1$ degree scales and will require mitigation during the inference of cosmological parameters using cosmic shear measurements.

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Xiangchong Li, Hironao Miyatake, Wentao Luo, Surhud More, Masamune Oguri, Takashi Hamana, Rachel Mandelbaum, Masato Shirasaki, Masahiro Takada, Robert Armstrong, Arun Kannawadi, Satoshi Takita, Satoshi Miyazaki, Atsushi J. Nishizawa, Andrés A. Plazas Malagón, Michael A. Strauss, Masayuki Tanaka, Naoki Yoshida. 2022-02-02. The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey. https://doi.org/10.1093/pasj%2Fpsac006

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