Results 1 to 10 of about 113,730 (333)

Gamma-ray Polarimetry of Transient Sources with POLAR [PDF]

open access: green, 2022
Polarization measurements of the gamma-ray component of transient sources are of great scientific interest, they are however, also highly challenging.
Merlin Kole, Jianchao Sun
semanticscholar   +4 more sources

Discovery of a Nonblazar Gamma-Ray Transient Source Near the Galactic Plane: GRO J1838−04 [PDF]

open access: bronze, 1997
We report the discovery of a remarkable γ-ray transient source near the Galactic plane, GRO J1838-04. This source was serendipitously discovered by EGRET in 1995 June with a peak intensity of ~(4 ± 1) × 10-6 photons cm-2 s-1 (for photon energies larger ...
M. Tavani   +8 more
openalex   +3 more sources

Variable gamma-ray emission from the Be/X-ray transient A0535+26? [PDF]

open access: yes, 2001
We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed to the supernova remnant G180.0-1.7, but its time variability makes unlikely a physical link.
Bernado, M. M. Kaufman   +3 more
core   +4 more sources

The Burst and Transient Source Experiment (BATSE) Earth Occultation Catalog of Low‐Energy Gamma‐Ray Sources [PDF]

open access: bronze, 2004
The Burst and Transient Source Experiment (BATSE), aboard the Compton Gamma Ray Observatory (CGRO), provided a record of the low-energy gamma-ray sky (∼20-1000 keV) between 1991 April and 2000 May (9.1 yr).
B. A. Harmon   +12 more
openalex   +3 more sources

On the X-ray Outbursts of Transient Anomalous X-ray Pulsars and Soft Gamma-ray Repeaters [PDF]

open access: yes, 2012
We show that the X-ray outburst light curves of four transient anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs), namely XTE J1810-197, SGR 0501+4516, SGR 1627-41 and CXOU J164710.2-455216, can be produced by the fallback disk model that
Alpar   +30 more
core   +4 more sources

Gamma-ray bursts during neutron star formation. Gamma-ray bursts and transient X-ray sources [PDF]

open access: green, 1973
Discussions are presented of the associations between cosmic gamma ray bursts and transient X-ray sources, and the release of gravitational binding energy during the formation of neutron stars.
Cohen, J. M., Desai, U. D., Holt, S. S.
core   +2 more sources

Transient X-ray sources in the field of the unidentified gamma-ray source TeV J2032+4130 in Cygnus [PDF]

open access: green, 2007
We present an analysis of Chandra ACIS observations of the field of TeV J2032+4130, the first unidentified TeV source, detected serendipitously by HEGRA.
R. Mukherjee   +2 more
openalex   +3 more sources

First Results from Fermi GBM Earth Occultation Monitoring: Observations of Soft Gamma-Ray Sources Above 100 keV [PDF]

open access: yes, 2010
The NaI and BGO detectors on the Gamma-ray Burst Monitor (GBM) on Fermi are now being used for long-term monitoring of the hard X-ray/low energy gamma-ray sky.
A. Camero-Arranz   +64 more
core   +5 more sources

Radioactively Powered Gamma-Ray Transient Associated with a Kilonova from Neutron Star Merger [PDF]

open access: yesAstrophysical Journal Letters, 2022
The association of GW170817/GRB 170817A/AT2017gfo provides the first direct evidence for neutron star mergers as significant sources of r-process nucleosynthesis.
Meng-Hua Chen, R. Hu, E. Liang
semanticscholar   +1 more source

First Combined Study on Lorentz Invariance Violation from Observations of Energy-dependent Time Delays from Multiple-type Gamma-Ray Sources. I. Motivation, Method Description, and Validation through Simulations of H.E.S.S., MAGIC, and VERITAS Data Sets [PDF]

open access: yesAstrophysical Journal, 2022
Gamma-ray astronomy has become one of the main experimental ways to test the modified dispersion relations (MDRs) of photons in vacuum, obtained in some attempts to formulate a theory of quantum gravity.
J. Bolmont   +13 more
semanticscholar   +1 more source

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