Compton Observatory Data Deepen the Mystery of the Gamma‐Ray Bursters

Physics Today ◽  
1992 ◽  
Vol 45 (2) ◽  
pp. 21-24
Author(s):  
Bertram Schwarzschild
Keyword(s):  
Gamma Ray ◽  
Observatory Data

ANGULAR TWO-POINT CORRELATION FUNCTIONS FOR COSMOLOGICAL GAMMA-RAY BURST MODEL

1995 ◽  
Vol 04 (02) ◽  
pp. 219-230
Author(s):  
SHIHO KOBAYASHI ◽  
SHIN SASAKI ◽  
YASUSHI SUTO
Keyword(s):  
Correlation Functions ◽  
Gamma Ray ◽  
High Redshift ◽  
Current Data ◽  
Gamma Ray Bursts ◽  
Spatial Correlations ◽  
Gamma Ray Burst ◽  
Angular Correlations ◽  
Observatory Data ◽  
Point Correlation

We compute the angular two-point correlation functions of the gamma-ray bursts at cosmological distances. Since the gamma-ray burst emission mechanism is not yet established, we simply assume that the gamma-ray burst sources are associated with high-redshift galaxies in some way. Then on the basis of several simple models for the evolution of galaxy spatial correlations, we calculate the amplitude of angular two-point correlation functions on scales appropriate for the Compton Gamma Ray Observatory data. We find that in most cases the predicted correlations are difficult to detect with the current data rate and the angular resolution, but models in which the bursts preferentially occur at relatively low redshift (z≲0.5) predict correlation amplitudes on θ~5° which will be marginally detectable with the Gamma Ray Observatory data in several years. If future observations detect a signal of angular correlations, it will imply useful information on the correlation of galaxies at high redshifts provided that the gamma-ray bursts are cosmological.

scholarly journals Standardized formats for gamma-ray analysis applied to HAWC observatory data

2021 ◽  
Author(s):  
Laura Olivera-Nieto ◽  
Vikas Joshi ◽  
Harm Schoorlemmer ◽  
Axel Donath ◽  
Anushka Udara Abeysekara ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Observatory Data

On the possible gamma-ray source in Cygnus

1967 ◽  
Vol 31 ◽  
pp. 469-471
Author(s):  
J. G. Duthie ◽  
M. P. Savedoff ◽  
R. Cobb
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Right Ascension

A source of gamma rays has been found at right ascension 20h15m, declination +35°, with an uncertainty of 6° in each coordinate. Its flux is (1·5 ± 0·8) x 10-4photons cm-2sec-1at 100 MeV. Possible identifications are reviewed, but no conclusion is reached. The mechanism producing the radiation is also uncertain.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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