GRB seminar log (Apr. 2026-)

各地の研究拠点を結ぶオンライン会議。突発天体・高エネルギー天体の研究・情報を速報で共有する。

• 日時：毎週火曜日 午後12時00分より
• 場所：zoomでの開催
  
• 司会：西浦怜(天体核D2）（2024年度後期〜） ← 後藤瞭太(東大宇宙線研D3）（2024年度〜） ← 和田知己(東大宇宙線) (2022年度〜) ← 高橋和也(基研PD）（2018年度〜） ← 松本達矢(天体核D3)（2017年度）

2026/6/9

論文紹介

• Future landscape of astrophysical transients(鈴木)
  [Link]
• An energetic dirty fireball detected in soft X-rays(Hamidani)
  [arXiv:2603.26213]
• JWST reveals a supernova following a gamma-ray burst at z $\simeq$ 7.3(Hamidani)
  [arXiv:2507.18784]
• Relativistic electron acceleration at the bow shock of Jupiter and beyond (井上進)
  [Nature]
• PSF-like Alpha-Particle Events in LSST Images(Hamidani)
  [arXiv:2606.01295]
• Probing a new subclass of llGRB-SN transients: Insights from EP250304a and its associated supernova(井岡)
  [arXiv:2606.06213]
• Early Multiwavelength Observations of AT 2026fgk: The Luminous Afterglow to Sub-luminous GRB 260310A, Identified Independently of a Gamma-ray Trigger(井岡)
  [arXiv:2606.05146]
• A series of unfortunate events: CHIME/FRB misclassification of a Galactic pulsar as a periodic fast radio burst(井岡)
  [arXiv:2606.07087]
• OCEANS of Absorption: High-resolution NIRSpec Spectroscopy Reveals Diverse Balmer-line Absorption in Little Red Dots(井岡)
  [arXiv:2606.00258]
• ABCD: The Nuclear Structure of the Little Red Dots Revealted through Absorption, Break, Continuum, and Decrement(井岡)
  [arXiv:2606.04711]
• The UV Side of Little Red Dots: Red, Compact, and Iron-Enhanced Rest-UV Emission with a Strong Downturn around Ly$α$(井岡)
  [arXiv:2606.03522]
• The quasi-star model for Little Red Dots: potential and challenges(井岡)
  [arXiv:2606.06575]
• A Population of Red Galaxies with Very Strong Emission Lines at $z > 5$ Revealed by the NIRCam Medium Bands: ''Classic'' LRDs, Dusty Star-Forming Galaxies, and a Missing Population of LRDs(井岡)
  [arXiv:2606.06585]
• Fast-spinning massive black holes from slowly rotating low-metallicity stars: implications for GW231123(井岡)
  [arXiv:2606.04428]

2026/6/2

論文紹介

• Extreme Galaxy-scale Outflows Are Frequent among Luminous Early Quasars(井上進)
  [arXiv:2509.08793]
• Gamma-ray signature of superluminous supernovae: Fermi-LAT GeV detection of SN 2017egm and evidence of a central engine(Hamidani)
  [arXiv:2605.29909]
• Evidence for GeV emission of the superluminous supernova SN 2017egm(Hamidani)
  [arXiv:2407.05968]
• Inside the cocoon: a comprehensive explanation of the spectra of Little Red Dots(Hamidani)
  [arXiv:2601.18864]
• A formation scenario of black hole-envelope systems --viscous hydrodynamics simulation in general relativity--(井岡)
  [arXiv:2605.24087]
• Double Dots: Compact Pairs Mark Little Red Dots and High-Redshift Broad-line AGNs(井岡)
  [arXiv:2605.27903]
• GWTC-5.0: An Introduction to Version 5.0 of the Gravitational-Wave Transient Catalog(井岡)
  [arXiv:2605.27223]
• GWTC-5.0: Population Properties of Merging Compact Binaries(井岡)
  [arXiv:2605.27226]
• Self-acceleration of Hardening Binaries(井岡)
  [arXiv:2605.00976]

2026/5/26

論文紹介

• GRB 260310A/SN 2026fgk: Photometric and Spectroscopic Evolution of a Nearby GRB-Supernova and an Exceptionally Bright Afterglow at z=0.153(Hamidani)
  [arXiv:2605.18973]
• An extremely bright slow-rising afterglow from an off-axis jet in GRB 260310A(Hamidani)
  [arXiv:2605.23818]
• An Ultra-Faint, Chemically Primitive Galaxy Forming in the Reionization Era(井上進)
  [arXiv:2506.11846]
• A new sample of Little Red Dots at $z<0.45$ in DESI DR1: Broad Balmer lines, low ionization spectrum and no variability(井岡)
  [arXiv:2605.14233]
• (LRDs)$^2$: The Low-ReDshift Little Red Dots Survey. II. DESI DR1 Sample(井岡)
  [arXiv:2605.21574]
• A Magnetized Black Hole Envelope Model for Little Red Dots(井岡)
  [arXiv:2605.21589]
• On the quenching of LRD X-ray emission by both Compton-thick gas and high accretion rates(井岡)
  [arXiv:2605.15263]
• A 4200-hour HyperFlash and ÉCLAT campaign on the hyperactive FRB 20240114A: constraining energetics with the most brilliant bursts(井岡)
  [arXiv:2605.18513]
• Discovery of 30 Repeating Fast Radio Burst Sources and Uniform Population Statistics of 80 Repeating Sources from CHIME/FRB(井岡)
  [arXiv:2605.08410]
• Revisiting GW170817 at milliarcsecond scale: high-precision constraints on jet geometry and $H_0$(井岡)
  [arXiv:2605.11437]
• The Very Late Time Afterglow of GW170817 Favors a Wobbling Jet(井岡)
  [arXiv:2605.13719]
• Correlation Between X-Ray and Cosmic Neutrino Sources: From Obscured AGN to Blazars(井岡)
  [arXiv:2605.15360]

2026/5/12

論文紹介

• Type Ib Supernovae are bluer than Type Ic Supernovae(Hamidani)
  [arXiv:2605.01200]
• Evidence for GeV emission of the superluminous supernova SN 2017egm(村瀬)
  [arXiv:2407.05968]
• On the Gamma-ray Efficiency of Superluminous Supernovae: Potential Detections and Population-Level Constraints(村瀬)
  [arXiv:2604.16595]
• The GlimmIr: Spectroscopic Variability in a z~7 LRD Indicates Rapid Changes in Both the Narrow and Broad Line Regions(井岡)
  [arXiv:2604.25991]
• XRF 241001A/SN 2024aiiq: A Faint Soft X-ray Transient Detected by SVOM with a Broad-Line Type Ic Supernova Revealed by JWST(井岡)
  [arXiv:2604.20346]
• On the polarization position angle jumps in FRB 20240114A(井岡)
  [arXiv:2604.28012]
• Backlighting the Cosmic Web with Fast Radio Bursts: An Anthology of Dispersion Measure Cross-Correlations with Large-Scale Structure and Baryon Tracers(井岡)
  [arXiv:2604.22105]
• Baryons in the Darkest Sites of the Universe(井岡)
  [arXiv:2605.01994]
• Self-acceleration of Hardening Binaries(井岡)
  [arXiv:2605.00976]

2026/4/28

論文紹介

• From Internal Collision to Photon Escape: First-Principles Modeling of Radiation-Mediated Shocks in Gamma-Ray Burst Photospheres(松井)
  [arXiv:2604.07453]
• Ultra-high-energy $γ$-ray imprints from PeV particles accelerated by supernova remnants(霜田)
  [arXiv:2604.22621]
• Variability of Sagittarius A* at 3 GHz on minute-scale with MeerKAT(霜田)
  [arXiv:2604.22638]
• An Archival Optical Counterpart Search for Extragalactic Fast X-Ray Transients Discovered by Einstein Probe(Hamidani)
  [arXiv:2602.06321]
• XRF 241001A/SN 2024aiiq: A Faint Soft X-ray Transient Detected by SVOM with a Broad-Line Type Ic Supernova Revealed by JWST(Hamidani)
  [arXiv:2604.20346]
• Multi-wavelength study of EP250416a / GRB 250416C: An Optically Dark Long GRB with a Late Jet Break(Hamidani)
  [arXiv:2604.21624]

2026/4/21

論文紹介

• Detection of the optical counterpart of the transient ULX NGC300 ULX-1: a nascent black hole - neutron star binary?(鈴木)
  [arXiv:2503.02120]
• JWST spectroscopy of SN 2010da/NGC 300 ULX-1: a surviving star hidden by dust(鈴木)
  [arXiv:2604.13711]
• GRB 210704A: A Luminous Fast Blue Transient in a GRB Afterglow at $z = 2.34$(Hamidani)
  [arXiv:2604.14343]
• A fast X-ray transient with chromatic flares: signatures of violent collisions induced by late-time central engine reactivation(Hamidani)
  [arXiv:2604.14341]
• The Cliff: A Metal-Poor Little Red Dot Hosting an Overmassive Black Hole at $z = 3.55$(井岡)
  [arXiv:2604.09177]
• How I Wonder What You Are -- JWST's Little Red Dots do not TWINKLE(井岡)
  [arXiv:2604.13000]
• Discovery of low-redshift analogues to "Little Red Dots" in DESI: A later evolutionary stage of compact LRDs?(井岡)
  [arXiv:2604.14551]
• Euclid: Scaled-up little red dots and other sources with v-shaped spectral energy distributions at z>4(井岡)
  [arXiv:2604.16178]
• Joint Observation of SGR J1935+2154 with \textit{Insight}-HXMT and KM40m during the active episode of October 2022(井岡)
  [arXiv:2604.10131]
• Gardening on the Moon: An Advection-Diffusion Model to Guide the Search for Supernova Debris in the Lunar Regolith(井岡)
  [arXiv:2604.09524]

2026/4/14

論文紹介

• A Unified Model for Shock Interaction and $γ$-Ray Emission in Classical Novae(松本)
  [arXiv:2604.06310]
• GLIMPSED: Direct evidence for a fast AGN-driven outflow from a z=6.64 Little Red Dot host galaxy(西浦)
  [arXiv:2604.08687]
• Neutron Star Merger Rates from Multi-messenger Observations: Clues to the Physical Origin of the Short and Long-short Gamma-ray Bursts(衣川)
  [arXiv:2604.06772]
• Implications of low neutron star merger rates for gamma-ray bursts, r-process production and Galactic double neutron stars(井岡)
  [arXiv:2604.05059]
• Wide Jets or Low Rates: Reconciling Short GRB and Gravitational-Wave Neutron Star Merger Rates(井岡)
  [arXiv:2604.05046]
• The Jet Opening Angle and Event Rate Distributions of Short Gamma-ray Bursts from Late-time X-ray Afterglows(Hamidani)
  [arXiv:2210.05695]
• Wings of little dots: Exponential broad lines from a stratified BLR(井岡)
  [arXiv:2604.04216]
• SPURS: Evidence for Clumpy Neutral Envelopes and Ionized IGM Surrounding Little Red Dots in Abell 2744 from Ultra-Deep Rest-UV Spectroscopy(井岡)
  [arXiv:2604.03563]
• Holes in the BH$^\star$? AGN signatures in the FUV spectrum of a black-hole dominated Little Red Dot at $z=7.04$(井岡)
  [arXiv:2604.03370]
• Great Walls of Cosmic Baryons in the Northern Sky(井岡)
  [arXiv:2604.05093]
• GECAM discovery of a peculiar magnetar X-ray burst (MXB 221120) from SGR J1935+2154 associated with a fast radio burst(井岡)
  [arXiv:2604.02261]
• The host galaxies and merger environments of short and long gamma-ray bursts producing kilonovae(井岡)
  [arXiv:2604.06586]
• Probing the Planck scale with quantum computation(井岡)
  [arXiv:2604.06322]

2026/4/7

論文紹介

• Constraining the PeV gamma-ray emission zone of Cygnus X-3 with contemporaneous GeV timing and spectral observations(霜田)
  [arXiv:2604.04768]
• The Delay Time Distribution of Tidal Disruption Events(霜田)
  [arXiv:2604.04831]
• An Intertwined Short and Long GRB with 4-minute Separation(Hamidani)
  [arXiv:2603.28699]
• Relativistic \(^{56}\text{Ni}\) Decay Lines in GRB 221009A(Hamidani)
  [arXiv:2603.10151]
• Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614(Hamidani)
  [arXiv:0612238]
• There is a short gamma-ray burst prompt phase at the beginning of each long one(Hamidani)
  [arXiv:1408.1608]
• An energetic dirty fireball detected in soft X-rays(井岡)
  [arXiv:2603.26213]
• A PANORAMIC of UV-optical morphologies of "Little Red Dots": Two groups of LRDs distinguished by UV half-light radius(井岡)
  [arXiv:2603.24700]
• A Black Hole Star at Cosmic Noon: Extreme Balmer break, photospheric continuum, and broad absorption by thick winds in a Little Red Dot at z=1.7(井岡)
  [arXiv:2603.28335]
• Little Red and Blue Dots: simply stratified Broad Line Regions(井岡)
  [arXiv:2603.22277]
• A quasi-star is born: formation and evolution of accreting quasi-stars as a metallicity-independent pathway to Little Red Dots(井岡)
  [arXiv:2603.21714]

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