1705.06745
The first-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
Mandelbaum, Miyatake, Hamana, Oguri, Simet, Armstrong, Bosch, et al
Present and characterize the catalog of galaxy shape measurements that will be used for cosmological WL measurements in the Wide layer of the first year of HSC survey. The catalog covers an area of 136.9 deg^2 split into 6 fields, with a mean i-band seeing of 0.58" and 5 sigma point-source depth of i~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. PSF modeling is carried out on individual exposures, while galaxy shapes are measured in a linear coaddition. Define the requirements for cosmological WL 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 2 different sets of image simulations. Finally, discuss the dominant systematics and the planned algorithmic changes to reduce them in future data reductions.
1705.06766
The Hyper Suprime-Cam Software Pipeline
Bosch, Armstrong, et al
Describe the optical imaging data processing pipeline developed for HSC. The HSC Pipeline builds on the prototype pipeline begin developed by LSST Data Management system, adding customization for HSC, LS processing capabilities, and novel algorithms that have since been reincorporated into the LSST codebase. While designed primarily to reduce HSC SSP data, it is also the recommended pipeline for reducing general-observer HSC data. The HSC pipeline includes high level processing steps that generate coadded images and science-read catalogs as well as low-level detrending and image characterizations.
1705.06792
Two- and three-dimensional wide-field weak lensing mass maps from the Hyper Suprime-Cam Subaru Strategic Program S16A data
Oguri, Miyazaki, Hikage, et al
Present wide-field (167 deg^2) weak lensing mass maps from the HSC-SSP. Compare these WL based DM maps with maps of the distribution of the stellar mass associated with luminous red galaxies. Find a strong correlation between these 2 maps with a correlation coefficient of rho=0.54±0.03 (for a smoothing size of 8'). This correlation is detected even with a smaller smoothing scale of 2' (rho-0.34±0.01). This detection is made uniquely possible because of the high source density of the HSC-SSP WL survey (near~25 armin^-2). Also present a variety of tests to demonstrate that the maps are not significantly affected by systematic effects. By using the photometric redshift information associated with source galaxies, reconstruct a 3D mass map. This 3D mass map is also found to correlate with the 3D galaxy mass map. Cross-correlation tests presented in this paper demonstrate that the HSC-SSP WL mass maps are ready for further science analyses.
1705.06852
Multiwavelength study of X-ray Luminous Clusters i the Hyper Suprime-Cam Subaru Strategic Program S16A field
Miyaoka, et al
Present a joint X-ray, optical and WL analysis for X-ray luminous galaxy clusters selected within the MCXC cluster catalog in the HSC-SSP survey field with S16A data. Measure hydrostatic equilibrium (H.E.) masses using XMM-Newton data for a sample of four MCXC clusters in the current coverage area. Additionally analyze a non-MCXC cluster associated with one MCXC cluster to calibrate the X-ray analysis. Show that H.E. masses for the MCXC clusters are correlated with cluster richness from the CAMIRA catalog (Oguri+2017), while that for the non-MCXC cluster deviates from the scaling relation. The mass normalization of the relationship between the cluster richness and H.E. mass is compatible with one inferred by matching CAMIRA cluster abundance with a theoretical halo mass function. The mean gas mass fraction based on H.E. masses for the MCXC clusters is <f_gas> = 0.126±0.010 at spherical overdensity Delta=500, which is ~80-90 % of the cosmic mean baryon fraction, Omega_b/Omega_m, measured by CMB experiments. Find that the mean baryon fraction estimated from X-ray and HSC-SSP optical data is comparable to Omega_b/Omega_m. A WL shear catalog of BG galaxies, combined with photo-z, is currently available only for 3 clusters in the sample. Hydrostatic equilibrium masses roughly agree with WL masses, albeit with large uncertainty. This study demonstrates that the multi wavelength study using X-ray, HSC-SSP optical and WL data will enable understanding of cluster physics and utilize cluster-based cosmology.
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