Results 261 to 270 of about 70,039 (295)

Transient gamma-ray sources

Proceedings of the Indian Academy of Sciences - Section A, 1971
Gamma-ray production by particles escaping from a pulsar into the surrounding nebula is considered. The gamma-ray emission decreases with time and such pulsar-nebula complexes will be observed as transient sources.
Krishna M. V. Apparao, T. N. Rengarajan
openaire   +1 more source

Variable and transient Galactic gamma-ray sources with AGILE

Il Nuovo Cimento C, 2011
AGILE has been providing continous monitoring of the Galactic plane in its three years of operation. Thanks to its sensitivity at energies near 100 MeV, AGILE has observed variability and transient behaviour in a number of sources. Simultaneous hard-X ray coverage, rapid alerts to the astronomical community, and multiwavelength campaigns have provided ...
LONGO, FRANCESCO, A. Bulgarelli, A. Chen, F. Gianotti, A. Giuliani, F. Lucarelli, G. Piano, C. Pittori, S. Sabatini, E. Striani, M. Tavani, M. Trifoglio, F. Verrecchia, A. Argan, BARBIELLINI AMIDEI, GUIDO, E. Costa, P. Caraveo, P. W. Cattaneo, F. D'Ammando, G. De Paris, E. Del Monte, G. Di Cocco, G. Di Persio, I. Donnarumma, Y. Evangelista, M. Feroci, A. Ferrari, M. Fiorini, T. Froysland, F. Fuschino, M. Galli, C. Labanti, I. Lapshov, F. Lazzarotto, P. Lipari, M. Marisaldi, S. Mereghetti, MORETTI, ELENA, A. Morselli, L. Pacciani, A. Pellizzoni, F. Perotti, P. Picozza, M. Pilia, M. Prest, G. Pucella, M. Rapisarda, A. Rappoldi, A. Rubini, P. Soffitta, A. Trois, E. Vallazza, S. Vercellone, V. Vittorini, A. Zambra, D. Zanello, L. A. Antonelli, S. Colafrancesco, S. Cutini, P. Giommi, P. Santolamazza, L. Salotti   +61 more
openaire   +2 more sources

Location of Transient Gamma-Ray Sources with Thin Flat Scintillators

IEEE Transactions on Nuclear Science, 1976
Thin flat slabs of scintillator are a useful means of measuring angular location of gamma-ray fluxes of astronomical interest. A statistical estimate of position error has been made of two scintillator systems suitable for gamma-ray burst location from a balloon or satellite platform.
T. A. Parnell, J. C. Gregory, T. L. Kuo
openaire   +1 more source

A transient MeV range gamma-ray source observed by HEAO–1

AIP Conference Proceedings, 1994
The UCSD/MIT hard X‐ray and gamma‐ray instrument on the HEAO–1 surveyed the region near the galactic center three times during its lifetime in 1977–1979. During the Sept.–Oct. 1977 scan, a gamma‐ray source in the 300–650 keV range was detected south of the galactic center. The source was below threshold sensitivity in the Spring and Fall of 1978.
M. S. Briggs, D. E. Gruber, J. L. Matteson, L. E. Peterson   +3 more
openaire   +1 more source

Gamma-ray burst locations from the Burst and Transient Source Experiment

AIP Conference Proceedings, 1991
The Burst and Transient Source Experiment (BATSE) consists of eight anisotropic γ‐ray spectrometers at the corners of the Compton Gamma Ray Observatory. BATSE monitors the full sky from a fixed orientation and determines the direction of γ‐ray bursts with an accuracy appropriate for studying the bursts’ celestial distribution.
M. N. Brock, C. A. Meegan, F. E. Roberts, G. J. Fishman, R. B. Wilson, W. S. Paciesas, G. N. Pendleton   +6 more
openaire   +1 more source

The burst and transient source experiment for the gamma-ray observatory

AIP Conference Proceedings, 1982
The Burst and Transient Source Experiment (BATSE) is a highly sensitive, all‐sky monitor for the Gamma‐Ray Observatory (GRO). The eight scintillation detector modules of BATSE are positioned around the GRO spacecraft provide a uniform view of the entire sky above the horizon. Each module is 20 in. in diameter, 0.5 in.
G. J. Fishman, C. A. Meegan, T. A. Parnell, R. B. Wilson   +3 more
openaire   +1 more source

Estimating significance in observations of variable and transient gamma-ray sources

Astroparticle Physics, 2017
Abstract The standard method for estimating the statistical significance of a gamma-ray source detection is that introduced by Li & Ma (1983), Eq. (17). In observing sources with time-dependent light curves, one can improve on this method by including approximate a priori knowledge of the source temporal behavior.
Ori M. Weiner, T.B. Humensky, Reshmi Mukherjee, Marcos Santander   +3 more
openaire   +1 more source

A Light and Effective Wide Field Monitor for Gamma Ray Bursts and Transient Sources

AIP Conference Proceedings, 2009
We present here a concept for a light and low‐power wide field monitor working in the X‐ray range, suitable for simultaneous imaging of large portions of the sky and GRB localizations. Our concept evolves from and improves on the design of the 5‐kg SuperAGILE experiment, flying on the AGILE mission and currently delivering arcmin‐localizations of GRBs ...
M. Feroci, L. Amati, L. A. Antonelli, V. Bonvicini, R. Campana, E. Costa, E. Del Monte, I. Donnarumma, Y. Evangelista, F. Fiore, F. Fuschino, G. L. Israel, C. Labanti, I. Lapshov, F. Lazzarotto, M. Marisaldi, M. Mastropietro, E. Morelli, F. Muleri, F. Nicastro, M. Orlandini, L. Pacciani, F. Perotti, M. Rapisarda, A. Rashevsky, A. Rubini, P. Soffitta, A. Vacchi, G. Zampa, N. Zampa, Charles Meegan, Chryssa Kouveliotou, Neil Gehrels   +32 more
openaire   +2 more sources

Observation of AGILE transient $$\gamma $$-ray sources in coincidence with cosmic neutrino events

Rendiconti Lincei. Scienze Fisiche e Naturali, 2019
The origin of the diffuse flux of very high-energy cosmic neutrinos above TeV energies observed by the IceCube experiment at the South Pole is still largely unknown. Simultaneous multi-frequency observations of the uncertainty location regions of these cosmic neutrinos are needed to identify the possible electromagnetic counterpart.
Fabrizio Lucarelli, Marco Tavani
openaire   +1 more source