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A nearby long gamma-ray burst from a merger of compact objects

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arxiv 2209.03363 v2 pith:O6P6XZGZ submitted 2022-09-07 astro-ph.HE astro-ph.SR

classification astro-ph.HEastro-ph.SR
keywords mergerbrightburstscompactcore-collapsedistancedurationexplosions
verification ladder T0 review T1 audit T2 compute T3 formal

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Gamma-ray bursts (GRBs) are flashes of high-energy radiation arising from energetic cosmic explosions. Bursts of long (>2 s) duration are produced by the core-collapse of massive stars, those of short (< 2 s) duration by the merger of two neutron stars (NSs). A third class of events with hybrid high-energy properties was identified, but never conclusively linked to a stellar progenitor. The lack of bright supernovae rules out typical core-collapse explosions, but their distance scales prevent sensitive searches for direct signatures of a progenitor system. Only tentative evidence for a kilonova has been presented. Here we report observations of the exceptionally bright GRB211211A that classify it as a hybrid event and constrain its distance scale to only 346 Mpc. Our measurements indicate that its lower-energy (from ultraviolet to near-infrared) counterpart is powered by a luminous (~1E42 erg/s) kilonova possibly formed in the ejecta of a compact binary merger.

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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. AT 2024qfm: a luminous fast blue optical transient at a redshift of z = 0.2267 identified by Lasair-ZTF

    astro-ph.HE 2026-08 accept novelty 6.0 of 10

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  2. Inferring Neutron Star Nuclear Properties from Gravitational-Wave and Gamma-Ray Burst Observations

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    By matching LIGO-Virgo-KAGRA merger rates to gamma-ray burst rates, the authors infer that the dividing mass between short and long bursts is about 1.36 times the maximum neutron star mass.

  3. Connecting GRBs from Binary Neutron Star Mergers to Nuclear Properties of Neutron Stars

    astro-ph.HE 2024-12 conditional novelty 6.0 of 10

    By matching population-synthesis predictions to the observed ratio of long to short GRBs from binary neutron star mergers, the authors infer that the long-short remnant transition lies near M_ls ~ 1.3 M_TOV.

  4. Exploring the multi-wavelength properties of the high energetic event ZTF20abbiixp/GRB 200524A: from prompt emission to afterglow

    astro-ph.HE 2026-08 conditional novelty 5.0 of 10

    A multi-wavelength study of GRB 200524A reports a dense ISM environment with a high kinetic energy and a large magnetic-field energy fraction, inferred from forward plus reverse shock modeling.

  5. Neutrino pair annihilation driven jets from black-hole torus systems

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    Neutrino pair annihilation in black hole-torus systems launches relativistic fireballs with isotropic energies up to about 10^51 erg and durations around 0.1 s, which can account for faint short GRBs and GRB precursors.

  6. Gamma-ray bursts: what do we know today that we did not know 10 years ago?

    astro-ph.HE 2024-12 unverdicted

    A review of the past decade of gamma-ray burst research, highlighting structured jets, GR-MHD simulations, TeV detections, and the contested idea that many GRBs have moderate Lorentz factors.

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