Workshop: "The extreme Universe viewed in very-high-energy gamma rays 2025"
Web site: https://indico.icrr.u-tokyo.ac.jp/e/workshopCTAJ2025
Date：
1st day :JST 10:00 - 17:45
Tuesday, Feb. 3, 2026
2nd day :JST 9:30 - 16:55
Wednesday, Feb. 4, 2026
==========
Program:
*** invited talks 35+5
** invited talks 30+5
* PhD thesis 25+5
contributed 20+5
===JST 10:00 - 17:45 Tuesday, Feb. 3, 2026===
10:00 - 10:25 Registration for in-person participants
10:25 - 10:30
Opening
Tatsuo Yoshida (Ibaraki Unv.)
Chair1: Katsuaki Asano (ICRR, Univ. of Tokyo)
Session 1: Very-High-Energy Gamma-Ray Astrophysics (1)
10:30 - 11:05 (30+5)**
"Large-Sized Telescope array for CTAO: status and first results"
Ievgen Vovk (ICRR, Univ. of Tokyo)
11:05 - 11:45 (35+5)***
"Revealing the most extreme Galactic sources with LHAASO"
Dmitry Khangulyan (IHEP, CAS)
11:45 - 12:50 (65) Lunch
Chair2: Marcel Strzys (ICRR, Univ. of Tokyo)
Session 2: Microquasars and Particle Acceleration
12:50 - 13:25 (30+5)**
"XRISM Views of Microquasars"
Megumi Shidatsu (Ehime Univ.)
13:25 - 13:50 (20+5) [online]
"HAWC Gamma-Ray and radio observations of the microquasar V4641 Sgr"
Eduardo de la Fuente Acosta (Univ. of Guadalajara)
13:50 - 14:25 (30+5)** [online]
"Cosmic-Ray Particle Acceleration
by Microquasars Revealed with the Square Kilometre Array"
Haruka Sakemi (Yamaguchi Univ.)
Chair3: Seiya Nozaki (ICRR, Univ. of Tokyo)
Session 3: Very-High-Energy Gamma-Ray Astrophysics (2)
14:25 - 15:00 (30+5)**
"Sub-PeV gamma-ray observations of the northern and southern skies
by the Tibet and ALPACA experiments"
Takashi Sako (ICRR, Univ. of Tokyo)
15:00- 15:30 (30) Group photos + Coffee Break
Session 4: Contributed Talks (1)
15:30- 15:55 (20+5)
"The role of TeV-PeV cosmic rays in the Milky Way and beyond"
Susumu Inoue (Chiba Univ.)
15:55- 16:20 (20+5)
"A common four-beam geometry reveals altitude-stratified GeV pulses
in canonical young pulsars"
Kin Hang (Paul) Yeung (ICRR, Univ. of Tokyo)
Chair4: Akira Okumura(ISEE, Nagoya Univ.)
16:20- 16:45 (20+5)
"Constrain the Disk-corona Geometry of Stellar Mass Black Hole Cyg X-1
with X-ray Spectral-polarimetric Observations"
Sixuan Zhang (Hiroshima Univ.)
16:45- 17:10 (20+5)
"High energy gamma-ray emission from globular cluster populations in galaxies"
Ellis Owen (RIKEN)
Session 5: Dark Matter (1)
17:10 - 17:45 (30+5)**
"The 20 GeV Fermi halo: Evidence for dark matter annihilation?"
Tomonori Totani (Univ. of Tokyo)
18:00 - 20:00 Banquet
===JST 9:30 - 16:55 Wednesday, Feb. 4, 2026==
Chair5: Hiroyasu Tajima (ISEE, Nagoya Univ.)
Session 6: PhD theses
9:30 - 10:00 (25+5)*
"TeV Gamma-Ray Emission across the Galactic Center Ridge with the CTAO LST-1"
Shotaro Abe (ICRR, Univ. of Tokyo)
10:00 - 10:30 (25+5)*[online]
"AGN observations with the LST-1 and new constraints on the EBL intensity"
Joshua Ryo Baxter (Clemson Univ.)
Chair6: Mitsunari Takahashi (ISEE, Nagoya Univ.)
Session 7: Contributed Talks (2)
10:30 - 10:55 (20+5)
"ALMA Calibrator Science for CTAO:
Hidden Galactic Clouds and a Millimeter View of Gamma-ray Blazars"
Kanako Narita (Univ. of Tokyo)
10:55 - 11:20 (20+5)
"High-redshift intergalactic magnetic field lower limits"
Ievgen Vovk (ICRR, Univ. of Tokyo)
11:20- 11:45 (20+5)
"Galaxy Clusters in GeV/TeV"
Olaf Reimer (Institute for Astro- and Particle Physics, Innsbruck Univ.)
11:45 - 12:55 (70) Lunch
Chair7: Koji Noda (ICEHAP, Chiba Univ.)
Session 8: Dark Matter (2)
12:55 - 13:30 (30+5)**
"Dark Matter Direct Searches"
Kentaro Miuchi (Kobe Univ.)
13:30 - 14:05 (30+5)**
"Probing Dark Matter with the Milky Way and Its Satellite Galaxies"
Kohei Hayashi (NIT, Sendai College）
Session 9: Multimessenger Astrophysics : SKA
14:05 - 14:40 (30+5)**
"Overview of SKAO and Collaboration with CTAO"
Takuya Akahori (Mizusawa VLBI Observatory, NAOJ)
14:40 - 15:10 (30) Coffee Break
Chair8: Takayuki Saito (ICRR, Univ. of Tokyo)
15:10 - 15:45 (30+5)**
"Radio Transient Studies in the (Pre-)SKA Era and Synergies with CTA"
Yuhei Iwata (NAOJ)
Session 10: Multimessenger Astrophysics : IceCube
15:45 - 16:20 (30+5)**
"Recent IceCube Highlights and Prospects with IceCube Upgrade"
Yukiho Kobayashi (ICEHAP, Chiba Univ.)
16:20 - 16:55 (30+5)**
"Soft X-ray transients monitored by MAXI"
Wataru Iwakiri (ICEHAP, Chiba Univ.)
