Optical Variability Monitoring for Gamma ray Blazars: preliminary results

This paper outlines some of the physics opportunities available with the GSI RISING active stopper and presents preliminary results from an experiment aimed at performing beta-delayed gamma-ray spectroscopic studies in heavy-neutron-rich nuclei produced following the projectile fragmentation of a 1 GeV per nucleon 208 Pb primary beam. The energy response of the silicon active stopping detector for both heavy secondary fragments and beta-particles is demonstrated and preliminary results on the decays of neutron-rich Tantalum ( Ta ) to Tungsten ( W ) isotopes are presented as examples of the potential of this technique to allow new structural studies in hitherto experimentally unreachable heavy, neutron-rich nuclei. The resulting spectral information inferred from excited states in the tungsten daughter nuclei are compared with results from axially symmetric Hartree–Fock calculations of the nuclear shape and suggest a change in ground state structure for the N = 116 isotone 190 W compared to the lighter isotopes of this element.

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Preliminary results from the 1999 balloon flight of the Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT)

10.1117/12.409128 ◽

2000 ◽

Cited By ~ 7

Author(s):

Elena Aprile ◽

Uwe G. Oberlack ◽

Alessandro Curioni ◽

Valeri Egorov ◽

Karl-Ludwig Giboni ◽

...

Keyword(s):

Gamma Ray ◽

Liquid Xenon ◽

Balloon Flight ◽

Preliminary Results ◽

Imaging Telescope ◽

Gamma Ray Imaging

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Rapid optical variability of the gamma-ray burst grb 080319b and its central engine

Astrophysical Bulletin ◽

10.1134/s199034131003003x ◽

2010 ◽

Vol 65 (3) ◽

pp. 223-229

Author(s):

G. Beskin ◽

S. Karpov ◽

S. Bondar ◽

A. Guarnieri ◽

C. Bartolini ◽

...

Keyword(s):

Gamma Ray ◽

Optical Variability ◽

Gamma Ray Burst ◽

Central Engine

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The Experimental Study of Lanthanum Bromide Detector in the Gamma Ray Imaging

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.336-338.373 ◽

2013 ◽

Vol 336-338 ◽

pp. 373-378

Author(s):

Cui Lan Zhao ◽

Yong Ping Li ◽

Li Hong Chen ◽

Chao Yuan ◽

Yu Jin Qi

Keyword(s):

Gamma Ray ◽

High Sensitivity ◽

Effective Field ◽

Detector Module ◽

Preliminary Results ◽

Lanthanum Bromide ◽

Imaging Detector ◽

Gamma Ray Imaging ◽

Position Sensitive Photomultiplier Tube ◽

Scintillator Crystal

Cerium activated lanthanum bromide (LaBr3:Ce3+) scintillator crystal has shown very promising characteristics for high-resolution and high-sensitivity gamma ray imaging and spectrometric applications [1,2,. In this paper, we present some preliminary results of a compact gamma camera based on LaBr3:Ce3+ crystal. The detector module consists of a continuous LaBr3:Ce3+ crystal with a sensitive area of 50x50 mm2 and 5mm thickness coupling to a Hamamatsu H8500 position-sensitive photomultiplier tube (PSPMT). A compact multiplexed readout based on symmetric charge division circuit (SCD) was developed to reduce the 64 anode signal to 16 readout channels, and a resistive division network to reduce the readout channels from 16 to 4. The performance of the imaging detector module was tested using a 57Co source. The preliminary results showed that this detector module can achieve an effective field-of-view (FOV) of ~39x39 mm2 with a good intrinsic spatial resolution around 1.5mm and energy resolution of 9.2% at 122 keV.

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AI gamma-ray burst classification: Methodology/preliminary results

Fourth Huntsville gamma-ray burst symposium ◽

10.1063/1.55403 ◽

1998 ◽

Cited By ~ 1

Author(s):

Jon Hakkila ◽

David J. Haglin ◽

Richard J. Roiger ◽

Robert S. Mallozzi ◽

Geoffrey N. Pendleton ◽

...

Keyword(s):

Gamma Ray ◽

Gamma Ray Burst ◽

Preliminary Results

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ON THE PRODUCTION OF HIGH-ENERGY NEUTRINOS IN GAMMA-RAY BURSTS

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514602075 ◽

2014 ◽

Vol 28 ◽

pp. 1460207

Author(s):

MATIAS M. REYNOSO

Keyword(s):

Energy Loss ◽

Gamma Ray ◽

Neutrino Flux ◽

High Energy ◽

Gamma Ray Bursts ◽

Proton Proton ◽

Preliminary Results ◽

Acceleration Zone ◽

High Energy Neutrinos

We present preliminary results of a model with two zones in order to study the production of high energy neutrinos at the prompt phase of gamma-ray bursts (GRB). We consider an acceleration zone, where protons and electrons are injected and accelerated, being subject to synchrotron, proton-proton, and proton-gamma cooling. We also assume that they can escape from this zone at a certain rate. The produced pions and the decaying muons are also subject to energy loss and gain processes within the acceleration zone, and the escaping ones are re-injected in a second zone where acceleration no longer operates. We compute the neutrino output expected from both of these zones using typical GRB parameters, and integrate in the redshift to obtain a diffuse neutrino flux which can be different from the expected within one-zone models.

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