HT
Hiromitsu Takahashi
astro-ph.HEastro-ph.IMastro-phastro-ph.COastro-ph.GAastro-ph.SRhep-exhep-phphysics.ins-detgr-qc
On Valency
published · living versionsW_4rs6dmcq·v1 · currentpublished
The peak-flux of GRB 221009A measured with GRBAlpha
with Jakub Ripa, Yasushi Fukazawa, Norbert Werner, Filip Munz +40
1 version
W_h9sh9n8g·v1published
Preprints & journals
220 papers in the corpus · 2001–2026The Complete Catalog of Gamma-Ray Transients Observed by GRBAlpha & VZLUSAT-2 CubeSat Missions2607.17971v2 · Marianna Dafcikova, Jakub Ripa, Andras Pal et al.2026 · 0 citationsarXiv
Instrument response generation using high-resolution 3D voxelization of GRBAlpha and VZLUSAT-2 satellites with MEGAlib2607.06311v1 · Jean-Paul Breuer, Masato Yokota, Yasushi Fukazawa et al.2026 · 0 citationsarXiv
Long-term performance of SiPMs in space environment measured by GRBAlpha, GRBBeta, and VZLUSAT-2 CubeSats2607.06318v1 · Jakub Ripa, Filip Munz, Marianna Dafcikova et al.2026 · 0 citationsProc. SPIE 14146, Space Telescopes and Instrumentation 2026: Ultraviolet to Gamma Ray, 1414657
Chemical enrichment of the Perseus cluster core seen by XRISM/Resolve2606.17141v3 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2026 · 1 citationarXiv
XRISM High-Resolution X-ray Spectroscopy of Cygnus X-1 -- highly ionized Iron absorption structures2604.21497v1 · Shinya Yamada, Natalie Hell, Elisa Costantini et al.2026 · 6 citationsPublications of the Astronomical Society of Japan, Volume 77, Issue 6, December 2025, Pages 1210-1223
XRISM High-Resolution X-ray Spectroscopy of Cygnus X-1 -- Orbital and Short-Term Variability of Iron Absorption2604.21557v1 · Kaito Ninoyu, Shinya Yamada, Natalie Hell et al.2026 · 0 citationsarXiv
Refined Constraints on the Hard X-ray Polarization of the Crab Pulsar and Nebula Derived from an Extended XL-Calibur Dataset2604.15501v1 · Matthew G. Baring, Jacob Casey, Sohee Chun et al.2026 · 0 citationsThe Astrophysical Journal, Volume 1002 (2026), Number 2
A Fast, Hot Wind from a Nuclear Starburst2603.24674v1 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2026 · 0 citationsNature, March 25, 2026
Narrow iron- and nickel-K absorption lines from the eclipsing low-mass X-ray binary AX~J1745.6$-$29012603.21727v1 · Kojiro Tanaka, Yoshitomo Maeda, Ryota Tomaru et al.2026 · 3 citationsarXiv
High Spectral Resolution X-ray Observations of the Evolved Supermassive Stellar Binary System Carinae - Iron K Band Profile Revealed with XRISM2602.22476v1 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2026 · 2 citationsarXiv
In-orbit Demonstration of X-ray Pulsar Navigation with NinjaSat2602.14166v1 · Naoyuki Ota, Takuya Takahashi, Toru Tamagawa et al.2026 · 0 citationsarXiv
GRBAlpha, VZLUSAT-2 and GRBBeta -- GRB observations with CubeSats2601.16609v1 · Jakub Ripa, Marianna Dafcikova, Andras Pal et al.2026 · 0 citationsarXiv
A XRISM/Resolve view of the dynamics in the hot gaseous atmosphere of M872512.06596v1 · M. Audard, H. Awaki, R. Ballhausen et al.2025 · 7 citationsarXiv
XRISM Observations of Accretion Disk Corona in Cyg X-22512.00589v1 · Misaki Mizumoto, Hiromitsu Takahashi, Ehud Behar et al.2025 · 1 citationarXiv
Constraining the Corona Geometry of Cyg X-1 with Broad Band Spectrum and Polarimetric Analysis Based on Observations in May 20222511.16246v1 · Sixuan Zhang, Tsunefumi Mizuno, Tomohisa Kawashima et al.2025 · 0 citationsarXiv
Comparing XRISM cluster velocity dispersions with predictions from cosmological simulations: are feedback models too ejective?2510.06322v2 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2025 · 10 citationsarXiv
Stratified wind from a super-Eddington X-ray binary is slower than expected2509.14555v1 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2025 · 12 citationsarXiv
Disentangling Multiple Gas Kinematic Drivers in the Perseus Galaxy Cluster2509.04421v2 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2025 · 14 citationsarXiv
Return of the Clocked Burster: Exceptionally Short Recurrence Time in GS 1826-2382508.18837v3 · Tomoshi Takeda, Toru Tamagawa, Teruaki Enoto et al.2025 · 1 citationThe Astrophysical Journal Letters, Volume 993, Number 1, L13 (2025)
Complex Ionization and Velocity Structures in GX 340+0 X-ray Binary Revealed by XRISM2508.09359v1 · Priyanka Chakraborty, Randall Smith, Lia Corrales et al.2025 · 0 citationsarXiv
XRISM/Resolve View of Abell 2319: Turbulence, Sloshing, and ICM Dynamics2508.05067v3 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2025 · 6 citationsarXiv
XL-Calibur Polarimetry of Cyg X-1 Further Constrains the Origin of its Hard-state X-ray Emission2507.23126v1 · Hisamitsu Awaki, Matthew G. Baring, Richard Bose et al.2025 · 2 citationsarXiv
XRISM Pre-Pipeline and Singularity: Container-Based Data Processing for the X-Ray Imaging and Spectroscopy Mission and High-Performance Computing2507.18087v1 · Satoshi Eguchi, Makoto Tashiro, Yukikatsu Terada et al.2025 · 0 citationsarXiv
The Structure of the Relativistic Fe Line in GX 340+0 as Viewed with XRISM/Resolve, NICER, and NuSTAR2507.06289v1 · R. M. Ludlam, R. Ballhausen, P. Chakraborty et al.2025 · 5 citationsarXiv
XRISM insights for interstellar Sulfur2506.08751v2 · Lia Corrales, Elisa Costantini, Sascha Zeegers et al.2025 · 6 citationsarXiv
XRISM Spectroscopy of the Stellar-Mass Black Hole 4U 1630-472 in Outburst2506.07319v1 · Jon M. Miller, Misaki Mizumoto, Megumi Shidatsu et al.2025 · 11 citationsarXiv
Verification of the Timing System for the X-ray Imaging and Spectroscopy Mission in the GPS Unsynchronized Mode2506.02967v1 · Megumi Shidatsu, Yukikatsu Terada, Takashi Kominato et al.2025 · 1 citationarXiv
Constraining gas motion and non-thermal pressure beyond the core of the Abell 2029 galaxy cluster with XRISM2505.06533v1 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2025 · 21 citationsarXiv
XRISM forecast for the Coma cluster: stormy, with a steep power spectrum2504.20928v1 · Marc Audard, Hisamitsu Awaki, Ralf Ballhausen et al.2025 · 32 citationsarXiv
Antihelium-3 Sensitivity for the GRAMS Experiment2503.16694v3 · J. Zeng, T. Aramaki, K. Aoyama et al.2025 · 0 citationsAstroparticle Physics 173 (2025) 103152
Development of the Timing System for the X-Ray Imaging and Spectroscopy Mission2503.13807v1 · Yukikatsu Terada, Megumi Shidatsu, Makoto Sawada et al.2025 · 3 citationsarXiv
XL-Calibur measurements of polarised hard X-ray emission from the Crab2503.14307v2 · Hisamitsu Awaki, Matthew G. Baring, Richard Bose et al.2025 · 5 citationsMonthly Notices of the Royal Astronomical Society 540 (2025) L34-L40
Detection of RS Oph with LST-1 and modelling of its HE/VHE gamma-ray emission2503.13283v1 · CTA-LST Project: K. Abe, S. Abe, A. Abhishek et al.2025 · 13 citationsA&A, 695 (2025) A152
Outflowing photoionized plasma in Circinus X-1 using the high-resolution X-ray spectrometer Resolve onboard XRISM and the radiative transfer code cloudy2503.08254v1 · Masahiro Tsujimoto, Teruaki Enoto, Mar'ia D'iaz Trigo et al.2025 · 11 citationsarXiv
Container-Based Pre-Pipeline Data Processing on HPC for XRISM2412.13225v1 · Satoshi Eguchi, Makoto Tashiro, Yukikatsu Terada et al.2024 · 0 citationsarXiv
NinjaSat: Astronomical X-ray CubeSat Observatory2412.03016v1 · Toru Tamagawa, Teruaki Enoto, Takao Kitaguchi et al.2024 · 9 citationsPublications of the Astronomical Society of Japan 77, 466-479 (2025)
NinjaSat monitoring of Type-I X-ray bursts from the clocked burster SRGA J144459.2$-$6042072411.10992v2 · Tomoshi Takeda, Toru Tamagawa, Teruaki Enoto et al.2024 · 11 citationsPublications of the Astronomical Society of Japan 77 (2025)
Characterization of more than three years of in-orbit radiation damage of SiPMs on GRBAlpha and VZLUSAT-2 CubeSats2411.00607v2 · Jakub Ripa, Marianna Dafcikova, Pavel Kosik et al.2024 · 3 citationsNuclear Instruments and Methods in Physics Research A, 1076 (2025), 170513
A new method of reconstructing images of gamma-ray telescopes applied to the LST-1 of CTAO2410.16042v1 · CTA-LST Project: K. Abe, S. Abe, A. Abhishek et al.2024 · 2 citationsA&A 691, A328 (2024)
GRBAlpha and VZLUSAT-2: GRB observations with CubeSats after 3 years of operations2407.12555v2 · Filip Munz, Jakub R'ipa, Andr'as P'al et al.2024 · 4 citationsProc. of SPIE Vol. 13093 (2024), 130936J-1
A detailed study of the very-high-energy Crab pulsar emission with the LST-12407.02343v1 · CTA-LST Project: K. Abe, S. Abe, A. Abhishek et al.2024 · 6 citationsarXiv
Systematic effects on a Compton polarimeter at the focus of an X-ray mirror2402.15229v1 · M. Aoyagi, R.G. Bose, S. Chun et al.2024 · 3 citationsAstropart. Phys. 158 (2024) 102944
Lowering the Energy Threshold using a Plastic Scintillator and Radiation-Damaged SiPMs2401.05087v2 · Teruaki Morishita, Yasushi Fukazawa, Hiromitsu Takahashi et al.2024 · 2 citationsNuclear Instruments and Methods in Physics Research Section A, vol. 1061, p. 169097 (2024)
Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data2310.01954v1 · H. Abe, K. Abe, S. Abe et al.2023 · 14 citationsA&A 680, A66 (2023)
Observations of the Crab Nebula and Pulsar with the Large-Sized Telescope Prototype of the Cherenkov Telescope Array2306.12960v3 · CTA-LST Project: H. Abe, K. Abe, S. Abe et al.2023 · 52 citations2023 ApJ 956 80
Gas selection for Xe-based LCP-GEM detectors onboard the CubeSat X-ray observatory NinjaSat2304.08321v2 · T. Takeda, T. Tamagawa, T. Enoto et al.2023 · 4 citationsarXiv
A broadband X-ray imaging spectroscopy in the 2030s: the FORCE mission2303.07577v1 · Koji Mori, Takeshi G. Tsuru, Kazuhiro Nakazawa et al.2023 · 8 citationsProc. of SPIE vol. 12181, 1218122 (2022)
The peak-flux of GRB 221009A measured with GRBAlpha2302.10047v4 · Jakub Ripa, Hiromitsu Takahashi, Yasushi Fukazawa et al.2023 · 25 citationsA&A 677, L2 (2023)on Valency
GRBAlpha: the smallest astrophysical space observatory -- Part 1: Detector design, system description and satellite operations2302.10048v2 · Andr'as P'al, Masanori Ohno, L'aszl'o M'esz'aros et al.2023 · 0 citationsarXiv
The design and performance of the XL-Calibur anticoincidence shield2212.04139v1 · N. K. Iyer, M. Kiss, M. Pearce et al.2022 · 12 citationsNuclear Instruments and Methods A 1048 (2023) 167975
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