Results 1 to 10 of about 218,159 (302)

Transient X-ray sources in the field of the Unidentified Gamma-Ray Source TeV J2032+4130 in Cygnus [PDF]

Astrophys.SpaceSci.309:29-33,2007, 2006
We present an analysis of Chandra ACIS observations of the field of TeV J2032+4130, the first unidentified TeV source, detected serendipitously by HEGRA. This deep (48.7 ksec) observation of the field follows up on an earlier 5 ksec Chandra director's discretionary observation.
Reshmi Mukherjee, Eric V. Gotthelf, Jules P. Halpern   +2 more
arxiv   +5 more sources

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

, 2022
Polarization measurements of the gamma-ray component of transient sources are of great scientific interest, they are however, also highly challenging. This is due to the typical low signal to noise and the potential for significant systematic errors. Both issues are made worse by the transient nature of the events which prompt one to observe a large ...
Kole, Merlin, Sun, Jianchao
  +7 more sources

Neutrino alert systems for Gamma Ray Bursts and transient astronomical sources [PDF]

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2009
GRBs are the most energetic events in the Universe, associated with the death of massive stars (core-collapse supernovae) or the merging of neutron stars or black holes. Discovered in the early 1970s, their cosmological origin was demonstrated only in 1997, when the first distance was measured.
Basa, S., Dornic, D., Lelaizant, G., Gendre, B., Busto, J., Mazure, A.   +5 more
openaire   +8 more sources

Gamma-ray all-sky imaging with the Burst and Transient Source Experiment [PDF]

Astronomy & Astrophysics, 2004
16 pages, 10 figures, accepted for publication in Astronomy and Astrophysics.
S. E. Shaw, J. J. Lockley, D. R. Willis, M. J. Westmore, A. B. Hill, C. Ferguson, A. J. Dean, Jürgen Knödlseder, A. J. Bird   +8 more
openaire   +4 more sources

A mass model for estimating the gamma ray background of the Burst and Transient Source Experiment [PDF]

Astronomy & Astrophysics, 2003
Orbiting x-ray and gamma ray instruments are subject to large background count rates due to local particle fluxes in the space environment. The ability of an instrument to make calibrated measurements of the flux from a source of interest is highly dependent on accurately determining the background level.
Shaw, S.E., Westmore, M.J., Bird, A.J., Dean, A.J., Ferguson, C., Gurriaran, R., Lockley, J.J., Willis, D.R.   +7 more
openaire   +6 more sources

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

The Astrophysical Journal Supplement Series, 2004
64 pages, 17 figures, abstract abridged, Accepted by ...
J. E. Grindlay, Colleen A. Wilson, W. Henze, Bradley M. Peterson, Valerie Connaughton, M. L. McCollough, M. L. McCollough, M. Sahi, William S. Paciesas, Didier Barret, Chris Shrader, Mark H. Finger, B. A. Harmon, B. A. Harmon, Gerald J. Fishman   +14 more
openaire   +4 more sources

Precise source location of the anomalous 1979 March 5 gamma-ray transient [PDF]

The Astrophysical Journal, 1982
Refinements in the source direction analysis of the observations of the unusual gamma ray transient are presented. The final results from the interplanetary gamma ray burst network produce a 0.1 arc sq. min. error box. It is nested inside the initially determined 2 arc sq min. source region. This smaller source location is within both the optical and X-
Bonnard J. Teegarden, Upendra D. Desai, W. D. Evans, Kevin Hurley, M. Niel, R. W. Klebesadel, C. Barat, Thomas L. Cline, J. G. Laros, G. Vedrenne   +9 more
openaire   +3 more sources

The detector response matrices of the burst and transient source experiment (BATSE) on the Compton Gamma Ray Observatory [PDF]

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1995
Abstract The detector response matrices for the Burst And Transient Source Experiment (BATSE) on board the Compton Gamma Ray Observatory (CGRO) are described, including their creation and operation in data analysis. These response matrices are a detailed abstract representation of the gamma-ray detectors' operating characteristics that are needed for
William S. Paciesas, G. N. Pendleton, Robert B. Wilson, Tom M. Koshut, Robert S. Mallozzi, Charles A. Meegan, Gerald J. Fishman, John M. Horack, John Patrick Lestrade   +8 more
  +7 more sources

AGILE Observations of Variable and transient $\gamma$-ray sources in the Galactic plane, Catalog improvements [PDF]

Proceedings of 25th Texas Symposium on Relativistic Astrophysics — PoS(Texas 2010), 2011
AGILE has provided continuous monitoring of the Galactic plane in γ-rays in more than three years of operation [1]. Thanks to its sensitivity at energies near 100 MeV, AGILE has observed variability and transient behavior in a number of sources. Simultaneous hard X-ray coverage, rapid alerts to the astronomical community, and multiwavelength campaigns ...
A. Chen
openaire   +4 more sources

Discovery of a transient MeV range gamma-ray source

The Astrophysical Journal, 1995
The University of California, San Diego (UCSD)/MIT hard X-ray and gamma-ray instrument on the HEAO 1 surveyed the region near the Galactic center 3 times during its lifetime in 1977-1979. During the 1977 September-October scan, a gamma-ray source was detected south of the Galactic center. The source was below the threshold sensitivity in the spring and
James L. Matteson, Laurence E. Peterson, Duane Gruber, Michael S. Briggs   +3 more
openaire   +3 more sources