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The first-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey | | Rachel Mandelbaum
; Hironao Miyatake
; Takashi Hamana
; Masamune Oguri
; Melanie Simet
; Robert Armstrong
; James Bosch
; Ryoma Murata
; François Lanusse
; Alexie Leauthaud
; Jean Coupon
; Surhud More
; Masahiro Takada
; Satoshi Miyazaki
; Joshua S. Speagle
; Masato Shirasaki
; Cristóbal Sifón
; Song Huang
; Atsushi J. Nishizawa
; Elinor Medezinski
; Yuki Okura
; Nobuhiro Okabe
; Nicole Czakon
; Ryuichi Takahashi
; Will Coulton
; Chiaki Hikage
; Yutaka Komiyama
; Robert H. Lupton
; Michael A. Strauss
; Masayuki Tanaka
; Yousuke Utsumi
; | | Date: |
18 May 2017 | | Abstract: | We present and characterize the catalog of galaxy shape measurements that
will be used for cosmological weak lensing measurements in the Wide layer of
the first year of the Hyper Suprime-Cam (HSC) survey. The catalog covers an
area of 136.9 deg$^2$ split into six fields, with a mean $i$-band seeing of
0.58 arcsec and $5sigma$ point-source depth of $isim 26$. Given conservative
galaxy selection criteria for first year science, the depth and excellent image
quality results in unweighted and weighted source number densities of 24.6 and
21.8 arcmin$^{-2}$, respectively. Point-spread function (PSF) modeling is
carried out on individual exposures, while galaxy shapes are measured on a
linear coaddition. We define the requirements for cosmological weak lensing
science with this catalog, characterize potential systematics in the catalog
using a series of internal null tests for problems with PSF modeling, shear
estimation, and other aspects of the image processing, and describe systematics
tests using two different sets of image simulations. Finally, we discuss the
dominant systematics and the planned algorithmic changes to reduce them in
future data reductions. | | Source: | arXiv, 1705.6745 | | Services: | Forum | Review | PDF | Favorites | |
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