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

Furusawa, Hisanori; Koike, M.; Takata, Tadafumi; Okura, Yuki; Miyatake, Hironao; Lupton, Robert H.; Bickerton, Steven J.; Price, P. A.; Bosch, James; Yasuda, Naoki; Mineo, Sogo; Yamada, Yoshiyuki; Miyazaki, Satoshi; Nakata, Fumiaki; Koshida, Shintaro; Komiyama, Yutaka; Utsumi, Yousuke; Kawanomoto, Satoshi; Jeschke, Eric; Noumaru, Junichi; Schubert, Kiaina; Iwata, Ikuru; Finet, F.; Fujiyoshi, Takuya; Tajitsu, Akito; Terai, Tsuyoshi; Lee, Chien‐Hsiu

doi:10.1093/pasj/psx079

Cited by 196 publications

(61 citation statements)

References 29 publications

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“…Hyper Suprime-Cam (HSC) is a wide-field imaging camera on the prime focus of the 8.2-meter Subaru telescope (Miyazaki et al 2015;Aihara et al 2018;Komiyama et al 2018;Furusawa et al 2018;Miyazaki et al 2018). Among three layers in the HSC survey, the Wide layer will cover 1400 deg 2 in five broad photometric bands (grizy) over 5-6 years, with excellent image quality of sub-arcsec seeing.…”

Section: Subaru Hyper Suprime-cam Surveymentioning

confidence: 99%

Mock galaxy shape catalogues in the Subaru Hyper Suprime-Cam Survey

Shirasaki

Hamana

Takada

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We use the full-sky ray-tracing weak lensing simulations to generate 2268 mock catalogues for the Subaru Hyper Suprime-Cam (HSC) survey first-year shear catalogue. Our mock catalogues take into account various effects as in the real data: the survey footprints, inhomogeneous angular distribution of source galaxies, statistical uncertainties in photometric redshift (photo-z) estimate, variations in the lensing weight, and the statistical noise in galaxy shape measurements including both intrinsic shapes and the measurement errors. We then utilize our mock catalogues to evaluate statistical uncertainties expected in measurements of cosmic shear twopoint correlations ξ ± with tomographic redshift information for the HSC survey. We develop a quasi-analytical formula for the Gaussian sample variance properly taking into account the number of source pairs in the survey footprints. The standard Gaussian formula significantly overestimates or underestimates the mock results by 50% level. We also show that different photo-z catalogues or the six disconnected fields, rather than a consecutive geometry, cause variations in the covariance by ∼ 5%. The mock catalogues enable us to study the chi-square distribution for ξ ± . We find the wider distribution than that naively expected for the distribution with the degrees-of-freedom of data vector used. Finally, we propose a method to include nonzero multiplicative bias in mock shape catalogue and show the non-zero multiplicative bias can change the effective shape noise in cosmic shear analyses. Our results suggest an importance of estimating an accurate form of the likelihood function (and therefore the covariance) for robust cosmological parameter inference from the precise measurements.

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Section: Subaru Hyper Suprime-cam Surveymentioning

confidence: 99%

Mock galaxy shape catalogues in the Subaru Hyper Suprime-Cam Survey

Shirasaki

Hamana

Takada

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…Hyper Suprime-Cam (HSC), is the wide field optical imaging camera installed on the prime focus of the Subaru Telescope (Miyazaki et al 2018;Komiyama et al 2018;Kawanomoto et al 2018;Furusawa et al 2018). The field of view of the camera is 1.77 square degrees and the pixel size is 0.17 arcsecs.…”

Section: Hyper Suprime-cammentioning

confidence: 99%

Effect of lensing magnification on type Ia supernova cosmology

Sakakibara

Nishizawa

Oguri

et al. 2019

Monthly Notices of the Royal Astronomical Society

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Effect of gravitational magnification on the measurement of distance modulus of type Ia supernovae is presented. We investigate a correlation between magnification and Hubble residual to explore how the magnification affects the estimation of cosmological parameters. We estimate magnification of type Ia supernovae in two distinct methods: one is based on convergence mass reconstruction under the weak lensing limit and the other is based on the direct measurement from galaxies distribution. Both magnification measurements are measured from Subaru Hyper Suprime-Cam survey catalogue. For both measurements, we find no significant correlation between Hubble residual and magnification. Furthermore, we correct for the apparent supernovae fluxes obtained by Supernova Legacy Survey 3-year sample using direct measurement of the magnification. We find Ω m0 = 0.287 +0.104 −0.085 and w = −1.161 +0.595 −0.358 for supernovae samples corrected for lensing magnification when we use photometric redshift catalogue of Mizuki, while Ω m0 = 0.253 +0.113 −0.087 and w = −1.078 +0.498 −0.297 for DEmP photo-z catalogue. Therefore, we conclude that the effect of magnification on the supernova cosmology is negligibly small for the current surveys; however, it has to be considered for the future supernova survey like LSST.

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“…The Hyper Suprime Cam Subaru Strategic Program (hereafter HSC-SSP) is an ongoing wide-field survey executed by the Hyper Suprime Cam mounted on the 8.2 meter Subaru telescope (Miyazaki et al 2012;Furusawa et al 2018;Komiyama et al 2018;Miyazaki et al 2018, Kawanomoto et al 2018. HSC-SSP is set to cover over 1400 deg 2 of the sky in five bands (grizy) to i HSC ∼ 26 (5σ point source depth, see Aihara et al 2018a,b).…”

Section: Introductionmentioning

confidence: 99%

Tidal Features at 0.05 < z < 0.45 in the Hyper Suprime-Cam Subaru Strategic Program: Properties and Formation Channels

Kado-Fong

Greene

Hendel

et al. 2018

ApJ

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We present 1,201 galaxies at 0.05 < z < 0.45 that host tidal features, detected from the first ∼ 200 deg 2 of imaging from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). All galaxies in the present sample have spectroscopic observations from the Sloan Digital Sky Survey (SDSS) spectroscopic campaigns, generating a sample of 21,208 galaxies. Of these galaxies, we identify 214 shell systems and 987 stream systems. For 575 of these systems, we are additionally able to measure the (g − i) colors of the tidal features. We find evidence for star formation in a subset of the streams, with the exception of streams around massive ellipticals, and find that stream host galaxies span the full range of stellar masses in our sample. Galaxies which host shells are predominantly red and massive: we find that observable shells form more frequently around ellipticals than around disc galaxies of the same stellar mass. Although the majority of the shells in our sample are consistent with being formed by minor mergers, 15% ± 4.4% of shell host galaxies have (g − i) colors as red as their host galaxy, consistent with being formed by major mergers. These "red shell" galaxies are additionally preferentially aligned with the major axis of the host galaxy, as previously predicted from simulations. We suggest that although the bulk of the observable shell population originates from fairly minor mergers, which preferentially form shells that are not aligned with the major axis of the galaxy, major mergers produce a significant number of observable shells.

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

Cited by 196 publications

References 29 publications

Mock galaxy shape catalogues in the Subaru Hyper Suprime-Cam Survey

Mock galaxy shape catalogues in the Subaru Hyper Suprime-Cam Survey

Effect of lensing magnification on type Ia supernova cosmology

Tidal Features at 0.05 < z < 0.45 in the Hyper Suprime-Cam Subaru Strategic Program: Properties and Formation Channels

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