Accepted proposals for Semester S25B
The Call for Proposals for Semester S25B received 139 submitted proposals for the Normal and Intensive Programs requesting a total of 319.96 nights.
After screening by TAC, 99.05 (including 6.5 ToO) nights were allocated to the following 58 proposals.
In addition, 25 nights are assigned to PFS SSP project, 4.0 nights are assigned to Service Program observations and 9.7 nights are assigned to three on-going Intensive Programs: S24A-023(3.5nights), S24B-080(1.19 Queue (1.7) nights) and S25A-047(3.15 Queue (4.5) nights).
Subaru Normal and Intensive Programs
| ID | PI | Proposal Title | Inst | Nts |
|---|---|---|---|---|
| S25B-001 | Taichi Uyama | Validating protoplanet candidates in a Perseus protoplanetary disk | CHARIS+SCExAO+NIRWFS-AO3k | 0.5 |
| S25B-006 | Shogo Nishiyama | The Origin of Late-type Stars Orbiting Galactic Supermassive BH Sgr A* 2 | NIRSPEC+LGS-AO(Keck) | 1 |
| S25B-009 | Kosuke Takahashi | Hunting ultra-massive quiescent galaxies in protoclusters at z~5.2-5.3 | MOIRCS | 1 |
| S25B-011 | Kazuki Daikuhara | Probing extended structures and low-mass regime in a filamentary protocluster | MOIRCS | 3 |
| S25B-012 | Kazuki Daikuhara | Spectroscopic characterization of a z=2.3 young filamentary protocluster | MOSFIRE(Keck) | 1 |
| S25B-015 | Michitoshi Yoshida | Optical-infrared follow-up observations of gravitational wave sources | HSC & FOCAS & MOIRCS & IRCS & PFS | 2 ToO |
| S25B-018 | Takashi Moriya | Exploring the long-timescale transient frontier with HSC at SXDS: Season 6 | HSC-Q | 0.9 Queue (1.29) |
| S25B-019 | Yuta Ishikawa | First systematic spec-z identification of high-z X-ray quasars at 4<z<6 | FOCAS | 2 |
| S25B-023 | Keiichi Maeda | Morphing Supernovae: Uncovering Diverse Channels in Stellar Evolution | FOCAS | 3 |
| S25B-024 | Mariko Kubo | The diverse cluster evolution probed with HSC2 blue clusters at 0.6<z<1.5 | PFS-Q | 2.45 Queue (3.5) |
| S25B-027 | Toshiyuki Mizuki | Vetting PSF Reference Stars for the Roman-Coronagraph and HWO | CHARIS+SCExAO+NGS-AO188 & VAMPIRES+SCExAO+NGS-AO188 | 0.5 |
| S25B-030 | Keiichi Maeda | Searching for sub-minute flares in a luminous-fast-blue transient | FOCAS | 1.5 ToO |
| S25B-032 | Satoshi Yamanaka | Dual NB emitters: A new wide-field search for high-z faint AGNs | FOCAS | 0.5 |
| S25B-035 | Yoshinobu Fudamoto | Probing a Lyα Bubble in the Galaxy Over-Density at z=8.47 | MOSFIRE(Keck) | 1 |
| S25B-036 | Yuya Hayashi | The Interplay Between Temperature Profiles and Chemical Composition in Moderately Hot Jupiter | IGRINS-2(Gemini-N) | 1.5 |
| S25B-039 | Hiroko Okada | Li abundances in bright very metal-poor subgiants | HDS | 3 |
| S25B-040 | Keiichi Maeda | Down to the moment of explosion: Rapid spectroscopy of infant transients | GMOS(Gemini-N) | 2 ToO (Gemini) |
| S25B-041 | Takuya Takarada | Establishing the presence or absence of hot Jupiters in Pleiades | HDS | 2.5 |
| S25B-045 | Hideyo Kawakita | Chemical characterization of 24P/Schaumasse: An evolutionary analog to Rosetta target 67P/Churyumov-Gerasimenko | NIRSPEC(Keck) | 0.5 |
| S25B-046 | Masafusa Onoue | PFS Confirmation of a z = 6.6 Proto-cluster Hosting a Luminous Quasar | PFS-Q | 1.9 Queue (2.72) |
| S25B-049 | Pete Kuzma | A Kinematic Exploration of Globular Cluster Extended Structures with PFS | PFS-Q | 1.2 Queue (1.71) |
| S25B-050 | Stevanus K Nugroho | 3D Atmosphere of an Ultra-hot Jupiter | IRD+NGS-AO188 | 1.5 |
| S25B-052 | Hiroto Yanagisawa | Physical Origin of the Strong HeI Lines in the Nitrogen-Enhanced Galaxy | MOIRCS | 0.5 |
| S25B-053 | Shunta Shimizu | Decoding Lyα Profiles: Subaru-JWST Study of LAE Properties | PFS-Q | 2.8 Queue (4.0) |
| S25B-057 | Haruka Kusakabe | Probing local metallicity environments of fast radio bursts with FOCAS IFU | FOCAS | 1 |
| S25B-058 | Takumi Kakimoto | A dense group with an AGN-hosting massive quiescent galaxy at z~ 4.4 | MOSFIRE(Keck) | 2 |
| S25B-059 | Stevanus K Nugroho | InfraRed Coolants in the Atmosphere of the Coldest Ultra Hot Jupiter | IRD+NGS-AO188 | 1 |
| S25B-060 | Yoshihisa Suzuki | Spectroscopic follow-up of new MW satellites uncovered by HSC | DEIMOS(Keck) | 2 |
| S25B-062 | Ryota Hatami | The Origin of Phosphorus-rich Stars | IRD+NGS-AO188 | 1.5 |
| S25B-063 | Kenneth Wong | Spectroscopy of Lensed Quasars for Time-Delay Cosmography | FOCAS | 1 |
| S25B-064 | Yuhiko Aoyama | Can Gas Giant Planet Undergo Magnetospheric Accretion ? | HDS | 0.5 |
| S25B-065 | Jun Hashimoto | ♦ Planet-Forming Disks around M-type stars in Taurus | CHARIS+SCExAO+NIRWFS-AO3k | 2 |
| S25B-066 | Tomokazu Kiyota | Filling the Last Missing Piece in the Giant Lyα Emitter Himiko at z~ 7 | KCWI(Keck) | 1 |
| S25B-067 | Masayuki Tanaka | Unveiling HI gas masses and scaling relations at z > 1 | PFS-Q | 1.75 Queue (2.5) |
| S25B-069 | Tadafumi Matsuno | A Census of the Milky Way's Outer Halo with the Subaru Telescope | HSC-Q | 0.6 Queue (0.86) |
| S25B-070 | Teruyuki Hirano | Obliquity Measurement for a T-Tauri Star with the Youngest Transiting Planet | IRD+NGS-AO188 | 2 |
| S25B-071 | Takumi Tanaka | PFS-3D Pilot Observation: First Spatially Resolved Spectroscopy with PFS | PFS-Q | 1.05 Queue (1.5) |
| S25B-076 | Yoshihisa Suzuki | Unveiling the origin of CEMP stars from dwarf galaxies in the Milky Way | HSC | 3 |
| S25B-078 | Yoshiharu Shinnaka | Unveiling ortho-para conversions of H2O in cometary coma using Doppler tomography: Case of 24P/Schaumasse | HDS | 1 |
| S25B-079 | Tomokazu Kiyota | Confirmation and characterization of the bona-fide clusters beyond z=2 | MOIRCS | 2 |
| S25B-081 | Junya Arita | The First Observational Constraint on Halo Mass Function of Quasars | PFS-Q | 2.3 Queue (3.25) |
| S25B-089 | Stevanus K Nugroho | Water Dissociation in Extreme Exoplanetary Environments | IRD+NGS-AO188 | 2 |
| S25B-091 | Kohki Uno | Constraining on Radiation Mechanisms of Optical/UV TDEs with Polarimetry | FOCAS | 2 ToO |
| S25B-099 | Akira Arai | Lithium Production in Thermonuclear Runaway of Classical/Recurrent Novae | HDS | 1 ToO |
| S25B-100 | Patryk Sofia Lykawka | Seven New Ultra-Faint Uranus Moons | HSC | 0.6 |
| S25B-103 | Masayuki Kuzuhara | RV Follow-Up of the Planetary Systems Hosting Benchmark Earth-Sized Planets in Preparation for JWST | IRD+NGS-AO188 | 4 |
| S25B-104 | Sakurako Okamoto | Completing the Mapping of the NGC 253 and NGC 4736 Stellar Halos | HSC-Q | 0.63 Queue (0.9) |
| S25B-113 | Kohei Ichikawa | Spectroscopic follow-up of radio-loud dust-obscured galaxies | FOCAS | 2 |
| S25B-114 | Masayuki Kuzuhara | Deep Direct Imaging of Candidate Planets around Young Sun-like Stars with Proper Motion Accelerations | CHARIS+SCExAO+NIRWFS-AO3k | 1 |
| S25B-116 | Daisuke Taniguchi | PFS census of metallicity variation of young stars over the M31/M33 disks | PFS | 1.5 |
| S25B-118 | Bakuh Danang Setyo Budi | Revealing Oxygen's Cosmic Past: IRD observations of EMP/UMP stars | IRD+NGS-AO188 | 1 |
| S25B-121 | Khee-Gan Lee | Mapping the Missing Baryons in the Foregrounds of Fast Radio Bursts | PFS | 1 |
| S25B-128 | Masafusa Onoue | Mass Distribution of Supermassive Black Holes at z=7 | MOIRCS | 2 |
| S25B-129 | Fumihiro Naokawa | Precise light curves of M31 eclipsing binaries by HSC | HSC | 5 |
| S25B-131 | Bunei Sato | Near-IR RV confirmation of planet candidates in the galactic thick disk | IRD+NGS-AO188 | 1 |
| S25B-133 | Ainun Azhari | Fission fragments in metal-poor, actinide-boost stars | HDS | 1.5 |
| S25B-135 | Hironao Miyatake | A Volume-complete Survey of X-Ray-Luminous Galaxy Clusters | HSC-Q | 0.5 Queue (0.72) |
| S25B-138 | Kana Morokuma | FOCAS-IFU pilot study of the best local analog of EoR galaxies | FOCAS | 2 |
The number of nights in ( ) for the HSC and PFS Queue programs indicates 1/0.7 times allocated nights to consider weather factors.
The instruments and nights written in italics are those of Gemini or Keck Telescopes, with which we have time-exchange programs.
♦ This proposal has been accepted in the category of Intensive Program and a total of 12 nights will be allocated from S25B to S26B.
UH Programs
| Proposal ID | PI | Title | Instrument | Night |
|---|---|---|---|---|
| S25B-UH001-B | Eric Gaidos | Iron in the fire: gaseous metals from an evaporating planet | HDS | 2 |
| S25B-UH003-A | Dave Sanders | Hawaii+Euclid: the extragalactic deep fields of the next decade | HSC | 1.5 |
| S25B-UH005-B | Yaguang Li | Surface magnetism of oscillating red giants through the lens of chromospheric emission | HDS | 2 |
| S25B-UH011-A | Maria Vincent | Exploring extincted disks in Orion and Taurus | CRS+SCExAO+NIRWFS | 2.5 |
| S25B-UH006-A | Michael Bottom | High-resolution polarimetric imaging of debris disks | CRS+SCExAO+NIRWFS | 2 |
| S25B-UH013-A2Q | Duncan Farrah | A Deep JCMT & Subaru Imaging Survey of the Deepest Ever Herschel Field | HSC | 1 |
| S25B-UH016-A | Isabella Valdes | Spectrosc follow-up of standard rod candidates in the Euclid Deep Field Fornax (EDF-F) | PFS | 4 |
| S25B-UH017-A | Thomas de Boer | Characterization of the ancient stellar halo of the Pegasus dwarf irregular galaxy | HSC | 1 |
| S25B-UH017-B | Thomas de Boer | Mapping the main body of the Sagittarius dwarf galaxy | HSC | 0.5 |
| S25B-UH028-A | Jan Kleyna | HSC search for near-Earth objects at small solar elongation | HSC | 2.0 |
| S25B-UH030-A | Ian Berry | Identifying and characterizing the Delta Scuti pulsators with the TESS mission | HDS | 1 |
| S25B-UH033-B | Roy Gal | A MOIRCS narrow-band imaging survey of massive LATIS protoclusters | MOIRCS | 1.5 |
| S25B-UH035-B | David Tholen | Extreme trans-Neptunian objects | HSC | 2 |
| S25B-UH041-A | Fin Giddings | Galaxy mergers and interactions within high-z protoclusters | PFS | 3 |
Time Exchange Programs with Gemini and Keck
| Proposal ID | PI | Title | Instrument | Night |
|---|---|---|---|---|
| S25B-TE013-GQ | HyeongHan Kim | Weighing the Dark Matter Filament in a Rare Linearly Aligned Triple Cluster Merger A98 | HSC-Q | 0.3 Queue (0.43) |
| S25B-TE180-GQ | Shane Bechtel | EProbing Quasar Emission via Photometric IGM Tomography | HSC-Q | 2.0 Queue (2.86) |
| S25B-TE252-G | Thayne Currie | Imaging Planet Formation Around An ALMA-Selected Sample of Young Suns with SCExAO, CHARIS, and VAMPIRES | SCExAO+CHARIS/VAMPIRES+Near-IR PyWFS-PDI | 1 |
| S25B-TE038-K | Thayne Currie | Supporting the Roman Space Telescope by Identifying Key, New Targets for the CGI Technological Demonstration | SCExAO+CHARIS | 2 |
| S25B-TE152-K | Shane Bechtel | Probing Quasar Emission via Photometric IGM Tomography | HSC (classical) | 2 |
| S25B-TE421-K | Evan Kirby | The Chemodynamics of Dwarf Elliptical Galaxies | PFS (classical) | 1.5 |
| S25B-TE251-K | Steph Sallum | Mind the Gap: Searching for Protoplanets in Disk Gaps using Kernel Phase Interferometry | SCExAO+CHARIS | 2 |
| S25B-TE061-K | Daniel Weisz | Chemical Characterization of the Ancient Stellar Halo of the Pegasus Dwarf Irregular Galaxy | HSC (classical) | 1 |
updated on July 2, 2025