Accepted proposals for Semester S26A
The Call for Proposals for Semester S26A received 157 submitted proposals for the Normal and Intensive Programs requesting a total of 444.92 nights.
After screening by TAC, 93.13 (including 11ToO) nights were allocated to the following 58 proposals.
In addition, 14.0 nights are assigned to PFS SSP project, 3.5 nights are assigned to Service Program observations and 14.8 nights are assigned to four on-going Intensive Programs: S24A-023 (6.0 nights), S24B-080 (2.3 Queue (3.3) nights), S25A-047 (3.15 Queue (4.5) nights) and S25B-065 (1.0 night).
Subaru Normal and Intensive Programs
| ID | PI | Proposal Title | Inst | Nts |
|---|---|---|---|---|
| S26A-003 | Shogo Nishiyama | The Origin of Late-type Stars Orbiting Galactic Supermassive BH Sgr A* 2 | IRCS+NIRWFS-AO3k | 2.0 |
| S26A-008 | Takashi Moriya | Spectroscopic confirmation of high-redshift supernova candidates from Euclid | FOCAS | 1 ToO |
| S26A-012 | Yuta Ishikawa | First systematic spec-z identification of high-z X-ray quasars at 4 ≲ z ≲ 6 | FOCAS | 2.0 |
| S26A-015 | Haruka Kusakabe | Probing local metallicity environments of fast radio bursts with FOCAS IFU II | FOCAS | 1.5 |
| S26A-016 | Jin Beniyama | Revealing the Origin of the Extremely Young Asteroid Pair 2010 UM26-2010 RN221 via Simultaneous Precise Photometry | LRIS (Keck) | 0.5 |
| S26A-018 | Rhythm Shimakawa | SUDS: Identification of the Most Significant Trough in HSC-SSP | PFS | 1.5 |
| S26A-022 | Michihiro Takami | How Do Young Stars Accrete? How May Gaseous Giant Planets Form? | IRCS+NGS-AO188 + VAMPIRES+SCExAO+NIRWFS-AO3k | 1.5 |
| S26A-027 | Yuichi Harikane | PFS-Euclid Synergetic Survey of ~20000 Galaxies and AGNs at z=0-9 | PFS | 5.0 |
| S26A-031 | Ryota Hatami | The Origin of Phosphorus-rich Stars | IRD+NGS-AO188 | 1.0 |
| S26A-032 | Katsuya Okoshi | Search for Galaxy associated with coincident, multiple dense HI gas | OSIRIS+LGS-AO (Keck) | 0.5 |
| S26A-036 | Masato Sato | Unveiling the Nature of Electron-Capture Supernovae from Nebular Spectra | FOCAS | 1 ToO |
| S26A-039 | Hideyo Kawakita | A NEW FRONTIER IN COMET SCIENCE: MULTI-APPARITION STUDIES OF PARENT VOLATILES | NIRSPEC (Keck) | 1.0 |
| S26A-048 | Masamune Oguri | Completing the Optical Northern Survey of the Euclid Sky | HSC-Q | 1.2 Queue (1.7) |
| S26A-055 | Masaomi Tanaka | Understanding Diversity of Supernovae Associated with Low-Luminosity GRBs | GMOS (Gemini-N) | 0.5 ToO (Gemini) |
| S26A-056 | Yuu Niino | Subaru Follow-up of Fast Radio Bursts | HSC & FOCAS & HDS & MOIRCS & IRCS | 1 ToO |
| S26A-060 | Masato Onodera | Origin of an enhancement of star formation activity and a Lyα halo at z=2.5 | MOIRCS | 1.0 |
| S26A-063 | Keiichi Maeda | Searching for sub-minute flares in a luminous-fast-blue transient | FOCAS | 1 ToO |
| S26A-064 | Yukun Huang | Sednoids: Probing the Next Frontier of the Outer Solar System | HSC | 4.0 |
| S26A-065 | Ko Ishida | Mapping gas and galaxies in proto-supercluster at z=2.23 with QSO clustering | HSC | 1.0 |
| S26A-066 | Silong Liu | Near-IR RV confirmation of planet candidates in the galactic thick disk | IRD+NGS-AO188 | 0.5 |
| S26A-068 | Ziying Gu | Follow-Up Observations of Substellar Companions to Refine Dynamical Masses | CHARIS+SCExAO+NIRWFS-AO3k | 2.0 |
| S26A-070 | Kyosuke Sato | Searching the Origin of the Stellar Halo" of the Ursa Minor dwarf Spheroidal galaxy" | HSC-Q | 1.4 Queue (2.0) |
| S26A-071 | Pete Kuzma | A Kinematic Exploration of Globular Cluster Extended Structures with PFS | PFS-Q | 0.7 Queue (1.0) |
| S26A-074 | Takuma Kokusho | Probing the origin of life's essential element: phosphorus in the Crab Nebula | MOIRCS | 1.0 |
| S26A-077 | Mitsuru Kokubo | Spectropolarimetric Dissection of Little Red Dots: AGN or Not? | FOCAS | 2.0 |
| S26A-088 | Ko Ishida | Quiescent Hearts: Confirming a Matured Cluster at z=1.52 in the Euclid Field | MOIRCS | 1.0 |
| S26A-091 | Takumi Tanaka | PFS-3D Pilot Survey: spatially resolved spectral diagnosis for massive galaxies | PFS | 1.0 |
| S26A-092 | Yuxing Zhong | First systematic spec-z confirmation of quasars in Euclid Deep Field North | PFS-Q | 2.1 Queue (3.0) |
| S26A-093 | Wako Aoki | Nitrogen and oxygen in unevolved Carbon-Enhanced Metal-Poor stars | HDS | 2.0 |
| S26A-094 | Yoshihisa Suzuki | Spectroscopic follow-up of new MW satellites discovered by HSC | FOCAS | 3.0 |
| S26A-096 | Yoshihisa Suzuki | A Census of CEMP Stars in the Local Group Dwarf Galaxies | HSC | 2.0 |
| S26A-099 | Toshiyuki Mizuki | Resolving extrasolar late-heavy-bombardment | FPDI+SECxAO+NGS-AO188 | 1.0 |
| S26A-100 | Yuhiko Aoyama | An essential step of satellite formation around Free-Floating Planets | PFS-Q | 1.07 Queue (1.53) |
| S26A-102 | Yuta Suzuki | Probing a Large-Scale Environment around a Luminous Quasar at z>6 with LAEs and LBGs | HSC-Q | 2.5 Queue (3.6) |
| S26A-104 | Naoki Yasuda | Spectroscopic Follow-up of Rubin/LSST transients S26A | PFS | 2.0 |
| S26A-106 | Takanori Sakamoto | Short GRBs as a Key to Understand Population of Merging Neutron Stars | FOCAS & HSC & IRCS | 1 ToO |
| S26A-107 | Takanori Sakamoto | Probing the Cosmic Reionization History using GRBs | IRCS & FOCAS | 1 ToO |
| S26A-109 | Yugo Kawai | Confirming ultra-short-period Jupiters as probes of tidal dissipation in M dwarfs | MAROON-X (Gemini-N) | 1.0 |
| S26A-110 | Hiroto Yanagisawa | Determining the Primordial He Abundance for Cosmology & Particle Phys. II | MOIRCS | 0.5 |
| S26A-116 | Shunta Shimizu | Probing the Lyα Escape Mechanism within an Ionized Bubble | DEIMOS (Keck) | 1.0 |
| S26A-117 | Keiichi Maeda | Morphing Supernovae: Uncovering Diverse Channels in Stellar Evolution | FOCAS | 2.5 |
| S26A-119 | Hiroko Okada | Exploring the distribution of r-process abundances with very bright VMP giants | HDS | 1.0 |
| S26A-124 | Haibin Zhang | Search for Optical Counterparts of Cosmic High-Energy Neutrinos | PFS | 3 ToO |
| S26A-125 | Yangming Lin | Studying actinide-boost phenomenon using r-process-enhanced stars | HDS | 0.5 |
| S26A-126 | Wenke Ren | A PFS Census of Dwarf Galaxies at the North Ecliptic Pole | PFS | 1.0 |
| S26A-131 | Koki Kakiichi | 3D Tomographic Mapping of Reionization with Lyα Emission in COSMOS-3D | PFS-Q | 1.56 Queue (2.23) |
| S26A-137 | Mayuko Mori | Pilot Study of Stellar Magnetic Activity and Its Impact on IR Spectra | IRD+NGS-AO188 | 0.5 |
| S26A-138 | Satoshi Kikuta | Exploring the Fluorescent Cosmic Web with Deep Hα/Lyα Imaging | LRIS (Keck) | 1.5 |
| S26A-139 | Kohei Hayashi | Constraints on the nature of dark matter from the Galactic dwarf galaxies | HSC-Q | 0.7 Queue (1.0) |
| S26A-147 | Hironao Miyatake | HSC-NIJI Blue: Painting the large-scale structure, galaxies, and AGN at cosmic noon | HSC | 4.0 |
| S26A-152 | Yuichi Matsuda | 3D Mapping of Proto Superclusters and Voids at z=3.09 | PFS-Q | 2.9 Queue (4.1) |
| S26A-155 | Kohki Uno | Constraining on Radiation Mechanisms of Optical/UV TDEs with Polarimetry | FOCAS | 2 ToO |
| S26A-161 | Nao Suzuki | Deep HSC imaging of the Euclid/JWST Deep Field : NEP | HSC-Q | 0.35 Queue (0.5) |
| S26A-163 | Masayuki Kuzuhara | RV Follow-Up of the Planetary Systems Hosting Benchmark Earth-Sized Planets in Preparation for JWST | IRD+NGS-AO188 | 1.5 |
| S26A-164 | Yuya Hayashi | Isotope survey towards comprehending the hot Jupiters formation pathways II | IGRINS-2 (Gemini-N) | 2.5 |
| S26A-166 | Mihoko Konishi | Identifying an infrared counterpart of a protoplanet | IRCS+NGS-AO188 | 1.0 |
| S26A-167 | Seiji Toshikage | Unveiling the nature of optical transients associated with high-energy neutrinos | GMOS (Gemini-N) | 1.5 ToO (Gemini) |
| S26A-176 | Julien Lozi | From Shocks to Shells: Multi-Faceted Characterization of Giants | VAMPIRES+SCExAO+NGS-AO188 | 1.0 |
The number of nights in ( ) for the HSC Queue programs indicates 1/0.7 times allocated nights to consider weather factors.
The number of nights in ( ) for the PFS Queue programs indicates 1/0.7 times allocated nights to consider weather factors and large observing overheads at the beginning of PFS operations.
The instruments and nights written in italics are those of Gemini or Keck Telescopes, with which we have time-exchange programs.
UH Programs
| ID | PI | Proposal Title | Inst | Nts |
|---|---|---|---|---|
| S26A-UH004-B | Yaguang Li | Testing the dynamo-driven mass loss mechanism with red clump stars | HDS | 3.0 |
| S26A-UH006-A | Maria Vincent | Ophiuchus disk survey | CHARIS+SCExAO+NIRWFS | 2.5 |
| S26A-UH010-AQ | Isabella Valdes | Spectroscopic follow-up of standard-rod candidates in the Euclid Deep Fields | PFS | 3.0 |
| S26A-UH013-B | David Tholen | Extreme trans-Neptunian objects | HSC | 2.0 |
| S26A-UH016-B | Jonathan Williams | Measuring the spatial extent of a wind from a gapped disk using spectro-astrometry | HDS | 1.0 |
| S26A-UH018-A | Grey Murphree | Ly-alpha tomography of EDF-N with PFS | PFS | 2.0 |
| S26A-UH020-A | Ken Chambers | WHIGS extension for the UNIONS survey and Euclid | HSC | 3.0 |
| S26A-UH022-A | Fin Giddings | Galaxy mergers and interactions within high-redshift protoclusters II | PFS | 2.0 |
| S26A-UH025-A | Jan Kleyna | HSC search for near-Earth objects at small solar elongation | HSC | 1.0 |
| S26A-UH036-A1Q | Dave Sanders | Hawaii+Euclid: the extragalactic deep fields of the next decade | HSC | 5.0 |
| S26A-UH037-B1 | Gregory Peak | Constraining the composition of the mysterious near-Sun asteroid 2008 HE | MOIRCS | 0.5 |
Time Exchange (Gemini/Keck) and Rubin Programs
(G: Gemini, K: Keck, R: Rubin, Q: Queue-mode)
| ID | PI | Proposal Title | Inst | Nts |
|---|---|---|---|---|
| S26A-TE025-K | Maxwell Millar-Blanchaer | Discovering Debris Disks Around Late-Type Stars with Polarimetric Differential Imaging | CHARIS+SCExAO+NIRWFS-AO3k | 1.5 |
| S26A-TE051-K | Thayne Currie | High-Contrast Imaging Characterization of a Newly Discovered Benchmark Jovian Protoplanet(s?) Orbiting a Young Sun | CHARIS+SCExAO+NIRWFS-AO3k | 0.5 |
| S26A-TE368-KQ | Jack Sayers | CHEX-MATE: Probing Dark Matter and Structure Formation | HSC | 2.0 |
updated on December 15, 2025