Second Data Release of the Hyper Suprime-Cam Subaru Strategic Program

Abstract

This paper presents the second data release of the Hyper Suprime-Cam Subaru Strategic Program, a wide-field optical imaging survey on the 8.2 meter Subaru Telescope. The release includes data from 174 nights of observation through January 2018. The Wide layer data cover about 300 deg^2 in all five broadband filters (grizy) to the nominal survey exposure (10min in gr and 20min in izy). Partially observed areas are also included in the release; about 1100 deg^2 is observed in at least one filter and one exposure. The median seeing in the i-band is 0.6 arcsec, demonstrating the superb image quality of the survey. The Deep (26 deg^2) and UltraDeep (4 deg^2) data are jointly processed and the UltraDeep-COSMOS field reaches an unprecedented depth of i~28 at 5 sigma for point sources. In addition to the broad-bands, narrow-band data are also available in the Deep and UltraDeep fields. This release includes a major update to the processing pipeline, including improved sky subtraction, PSF modeling, object detection, and artifact rejection. The overall data quality has been improved, but this release is not without problems; there is a persistent deblender problem as well as new issues with masks around bright stars. The user is encouraged to review the issue list before utilizing the data for scientific explorations. All the image products as well as catalog products are available for download. The catalogs are also loaded to a database, which provides an easy interface for users to retrieve data for objects of interest. In addition to these main data products, detailed galaxy shape measurements withheld from the Public Data Release 1 (PDR1) are now available to the community. The shape catalog is drawn from the S16A internal release, which has a larger area than PDR1 (160 deg^2). All products are available at the data release site, https://hsc-release.mtk.nao.ac.jp/.

arXiv comment26 pages, 23 figures, accepted for publication in PASJ. Data available at https://hsc-release.mtk.nao.ac.jp/

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• A deep analysis for New Horizons' KBO search images
• PAC.V. The Roles of Mass and Environment in the Quenching of Galaxies
• The PAU Survey: Photometric redshift estimation in deep wide fields
• HSC-CLAUDS survey: The star formation rate functions since z ~ 2 and comparison with hydrodynamical simulations
• Star Formation Properties of Sloan Digital Sky Survey BOSS Void Galaxies in the Hyper Suprime-Cam Survey
• EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely-Metal Poor Galaxies
• A Fresh Look at AGN Spectral Energy Distribution Fitting with the XMM-SERVS AGN Sample
• Scaling relations of X-ray Luminous Clusters in the Hyper Suprime-Cam Subaru Strategic Program Field
• Centrally concentrated molecular gas driving galactic-scale ionised gas outflows in star-forming galaxies
• Cluster candidates with massive quiescent galaxies at $z\sim 2$
• Validation of Emission-Line Galaxies Target Selection Algorithms for the Dark Energy Spectroscopic Instrument Using the MMT Binospec
• A major galaxy cluster merger caught by eROSITA: weak lensing mass distribution and kinematic description
• Galaxy clusters at z~1 imaged by ALMA with the Sunyaev-Zel'dovich effect
• The evolution of galaxy scaling relations in clusters at 0.5<z<1.5
• Improved Tomographic Binning of 3x2pt Lens Samples: Neural Network Classifiers and Optimal Bin Assignments
• The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) II. Luminosity Function
• Observational nonstationarity of AGN variability: The only way to go is down!
• The XMM Cluster Survey: An independent demonstration of the fidelity of the eFEDS galaxy cluster data products and implications for future studies
• MIGHTEE-HI: The radial acceleration relation with resolved stellar mass measurements
• A Ghost in Boötes: The Least Luminous Disrupted Dwarf Galaxy
• Photometric redshift estimation of strongly lensed galaxies
• MIGHTEE-HI: The direct detection of neutral hydrogen in galaxies at $z>0.25$
• Test of Cosmic Web-feeding Model for Star Formation in Galaxy Clusters in the COSMOS Field
• The effect of emission lines on the performance of photometric redshift estimation algorithms
• Going deeper into the dark with COSMOS-Web: JWST unveils the total contribution of Radio-Selected NIRfaint galaxies to the cosmic Star Formation Rate Density
• Subaru HSC weak lensing of SDSS redMaPPer cluster satellite galaxies: Empirical upper limit on orphan fractions
• ALMA Observations for CO Emission from Luminous Lyman-break Galaxies at $z=6.0293$-$6.2037$
• 100 Proof: HI Observations of 100 Nearby Dwarf Galaxies with the 100-meter Green Bank Telescope
• MIGHTEE-\HI: Possible interactions with the galaxy NGC~895
• Quenching of Galaxies at Cosmic Noon: Understanding the Effect of Environment
• The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar and APOGEE-2 Data
• Searching for low-redshift faint galaxies with MMT/Hectospec
• Photometric IGM tomography with Subaru/HSC: the large-scale structure of Ly$\alpha$ emitters and IGM transmission in the COSMOS field at $z\sim 5$
• Stellar tidal streams around nearby spiral galaxies with deep imaging from amateur telescopes
• Optical Spectroscopy of Dual Quasar Candidates from the Subaru HSC-SSP program
• MaNGA AGN dwarf galaxies (MAD). III. The role of mergers and environment in active galactic nucleus activity in dwarf galaxies
• SDSS-IV MaNGA: the physical origin of off-galaxy H$\alpha$ blobs in the local Universe
• Inferences on relations between distant supermassive black holes and their hosts complemented by the galaxy fundamental plane
• Kinematics of molecular gas in star-forming galaxies with large-scale ionised outflows
• The Sensitivity of the Redshift Distribution to Galaxy Demographics
• Using Machine Learning to Determine Morphologies of $z<1$ AGN Host Galaxies in the Hyper Suprime-Cam Wide Survey
• A LOFAR sample of luminous compact sources coincident with nearby dwarf galaxies
• The quasar luminosity function at $z\sim 5$ via deep learning and Bayesian information criterion
• The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) III. A red quasar with extremely high equivalent widths showing powerful outflows
• IllustrisTNG in the HSC-SSP: No Shortage of Thin Disk Galaxies in TNG50
• The SRG/eROSITA All-Sky Survey. The Weak-Lensing Mass Calibration and the Stellar Mass-to-Halo Mass Relation from the Hyper Suprime-Cam Subaru Strategic Program
• Detecting intermediate mass black holes in midiquasars with current and future surveys
• A Rich Satellite Population of the NGC 4437 Group and Implications of a Magnitude Gap for Galaxy Group Assembly History
• Dark Energy Survey Year 3 Results: Deep Field Optical + Near-Infrared Images and Catalogue
• pop-cosmos: Insights from generative modeling of a deep, infrared-selected galaxy population
• A Large Massive Quiescent Galaxy Sample at z~1.2
• Environments around quasars at $z\sim$3 revealed by wide-field imaging with Subaru HSC and CFHT
• Machine Learning Classification of COSMOS2020 Galaxies: Quiescent vs. Star-Forming
• A giant central red disk galaxy at redshift $z=0.76$: challenge to theories of galaxy formation
• Insights into environmental quenching at $z\sim 1$: an enhancement of faint, low-mass passive galaxies in clusters
• Environmental impact on star-forming galaxies in a $z\sim 0.9$ cluster during course of galaxy accretion
• MUSUBI (MegaCam Ultra-deep Survey: $u^{\ast }$-Band Imaging)-Data for the COSMOS and SXDS Fields
• Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
• Accelerating lensed quasar discovery and modeling with physics-informed variational autoencoders
• Chandra Survey in the AKARI North Ecliptic Pole Deep Field Optical/Infrared Identifications of X-ray Sources
• The stellar mass - physical effective radius relation for dwarf galaxies in low-density environments
• Central Concentration of Asymmetric Features in Post-starburst Galaxies at $z\sim 0.8$
• A New Polar Ring Galaxy Discovered in the COSMOS Field
• Deblurring galaxy images with Tikhonov regularization on magnitude domain
• Low-density star cluster formation: discovery of a young faint fuzzy on the outskirts of the low-mass spiral galaxy NGC 247
• Globular Clusters in NGC 4839 Falling into Coma: Evidence for the Second Infall?
• [CII] luminosity models and large-scale image cubes based on COSMOS 2020 and ALPINE-ALMA [CII] data back to the epoch of reionisation
• Effects of Environment on the Size Evolution of Quiescent Galaxies: Comparing Galaxies in Clusters and in the Field at Two Rest-frame Wavelengths
• Stellar CoRGI in MaNGA: Stellar Counterrotating Galaxies Identified in the MaNGA Survey
• X-ray stacking reveals average SMBH accretion properties of star-forming galaxies and their cosmic evolution over 4 <~ z <~ 7
• Nearby dwarf galaxies with extreme star formation rates: a window into dwarf-galaxy evolution in the early Universe
• Zangetsu: A Candidate of Isolated, Quiescent, and Backsplash Ultra-Diffuse Galaxy in the COSMOS Field
• The Intracluster Light of Abell 3667: Unveiling an Optical Bridge in LSST Precursor Data
• The X-ray and Radio Loud Fast Blue Optical Transient AT2020mrf: Implications for an Emerging Class of Engine-Driven Massive Star Explosions
• Major merger fraction along the massive galaxy quenching channel at 0.2$<z<$0.7
• A machine learning approach to assessing the presence of substructure in quasar host galaxies using the Hyper Suprime-Cam Subaru Strategic Program
• Z-Sequence: Photometric redshift predictions for galaxy clusters with sequential random k-nearest neighbours
• Properties of environment around AGN and luminous galaxy pairs through HSC wide survey
• MIGHTEE-HI: The star-forming properties of HI selected galaxies
• Automatic Machine Learning Framework to Study Morphological Parameters of AGN Host Galaxies within $z<1.4$ in the Hyper Supreme-Cam Wide Survey
• The HST-Hyperion Survey: Companion Fraction and Overdensity in a z ~ 2.5 Proto-supercluster
• Model-independent constraints on clustering and growth of cosmic structures from BOSS DR12 galaxies in harmonic space
• 3D intrinsic shapes of quiescent galaxies in observations and simulations
• J-PAS: Discovery of RaJav, a bright spatially extended Ly$\alpha$ Nebula at z=2.25
• Two years of optical and NIR observations of the superluminous supernova UID 30901 discovered by the UltraVISTA SN survey
• Dynamical Evolution of Voids with Surrounding Gravitational Tidal Field
• The major merger-active galactic nucleus connection up to the cosmic noon
• Signatures of large-scale cold fronts in the optically-selected merging cluster HSC J085024+001536
• H$\alpha$ emission in the outskirts of galaxies at z=0.4
• Analysis of Galactic cirrus filaments in HSC-SSP high-resolution deep images using artificial neural networks
• Measuring the evolution of stellar bars with the host galaxy's spin
• The miniJPAS and J-NEP surveys: Machine learning for star-galaxy separation
• ULISSE: Determination of star-formation rate and stellar mass based on the one-shot galaxy imaging technique
• HSC-XXL : Baryon budget of the 136 XXL Groups and Clusters
• ALMA measures molecular gas reservoirs comparable to field galaxies in a low-mass galaxy cluster at z=1.3
• Dark matter halos of luminous AGNs from galaxy-galaxy lensing with the HSC Subaru Strategic Program
• The Lyman-$\alpha$ Forest from LBGs: First 3D Correlation Measurement with DESI and Prospects for Cosmology
• Angular correlation functions of bright Lyman-break galaxies at $3\lesssim \mathbf{z}\lesssim 5$
• The intragroup light in KiDS+GAMA groups: A stacking analysis
• MUSE Study of Two Giant Low-surface-brightness Galaxies with Compact Satellites
• ODIN: Using multiplicity of Lyman-Alpha Emitters to assess star formation activity in dark matter halos
• Deblending the MIGHTEE-COSMOS survey with XID+: The resolved radio source counts to $S_{1.4}\approx 5\mu$Jy
• Fringing Analysis and Simulation for the Vera C. Rubin Observatory's Legacy Survey of Space and Time
• ODIN: A New Lyman Alpha Blob Selection Method, Sample, and Statistical Analysis at $z\sim 3.1$
• Enhancing Ground-Based Observations of Trans-Neptunian Objects using a Single-Epoch Parallax Measurement from L2
• FAST-SBF: an automatic procedure for the measurement of Surface Brightness Fluctuations for large sky surveys
• The FAST Hundred-Deg${}^2$ HI Deep (HD${}^2$) Survey: Early Results from the Pilot Survey
• Prospects for radio weak lensing: studies using LOFAR observations in the ELAIS-N1 field
• Catalogs of optically-selected clusters and photometric luminous red galaxies from the Hyper Suprime-Cam Subaru Strategic Program final year dataset
• The Exploration of Local VolumE Satellites (ELVES) Survey: A Nearly Volume-Limited Sample of Nearby Dwarf Satellite Systems
• The effect of spiral arms on the Sérsic photometry of galaxies
• The X-ray statistical properties of dust-obscured galaxies detected by eROSITA
• Identification of high-redshift X-ray active galactic nuclei in the 4XMM-DR11 serendipitous catalogue using DES data: Comparative analysis with optically-selected QSOs
• Using a Neural Network Classifier to Select Galaxies with the Most Accurate Photometric Redshifts
• The miniJPAS survey quasar selection I: Mock catalogues for classification
• High-$z$ Universe probed via Lensing by QSOs (HULQ) II. Deep GMOS spectroscopy of a QSO lens candidate
• Identifying AGN host galaxies by Machine Learning with HSC+WISE
• Highly Efficient Selection of High-Redshift Emission-Line Galaxies for future DESI-like surveys with Deep Multi-band Imaging
• Merger fraction in galaxy groups and clusters at z < 0.2: A non-parametric morphological study with Subaru Hyper Suprime-Cam
• The Evolution of the SFR-M_* relation at 0.1<z<4: Environmental and Morphological Dependencies
• Environmental Sculpting of Galaxy Structure at Fixed Stellar Mass: A Multi-Scale Analysis Across Cosmic Time using 3 Million HSC Galaxies