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Galactic Diffuse Emissions

Description: Interactions of cosmic rays with interstellar nucleons and photons make the Milky Way a bright, diffuse source of high-energy {gamma}-rays. Observationally, the results from EGRET, COMPTEL, and OSSE have now been extended to higher energies by ground-based experiments, with detections of diffuse emission in the Galactic center reported by H.E.S.S. in the range above 100 GeV and of diffuse emission in Cygnus by MILAGRO in the TeV range. In the range above 100 keV, INTEGRAL SPI has found that dif… more
Date: October 25, 2007
Creator: Digel, Seth W.
Partner: UNT Libraries Government Documents Department
open access

Prospects for Observations of Microquasars with GLAST

Description: The Gamma-ray Large Area Space Telescope (GLAST) is a next generation high energy gamma-ray observatory due for launch in Fall 2007. The primary instrument is the Large Area Telescope (LAT), which will measure gamma-ray flux and spectra from 20 MeV to > 300 GeV and is a successor to the highly successful EGRET experiment on CGRO. The LAT will have better angular resolution, greater effective area, wider field of view and broader energy coverage than any previous experiment in this energy ran… more
Date: October 9, 2007
Creator: Dubois, Richard
Partner: UNT Libraries Government Documents Department
open access

Future GLAST Observations of SNRs and PWNe

Description: Shell-type Supernova remnants (SNRs) have long been known to harbor a population of ultra-relativistic particles, accelerated in the Supernova shock wave by the mechanism of Diffusive shock acceleration. Pulsar Wind Nebulae (PWNe) - diffuse structures surrounding young pulsars - are also known to be a site of particle acceleration in the Galaxy. {gamma}-rays above 100 MeV provide a direct access to acceleration processes through the following channels: ultra-relativistic electrons emit {gamma}-… more
Date: October 10, 2007
Creator: Funk, S.
Partner: UNT Libraries Government Documents Department
open access

Cosmic Ray Electron Science with GLAST

Description: Cosmic ray electrons at high energy carry information about their sources, their diffusion in local magnetic fields and their interactions with the photon fields through which they travel. The spectrum of the particles is affected by inverse Compton losses and synchrotron losses, the rates of which are proportional to the square of the particle's energy making the spectra very steep. However, GLAST will be able to make unique and very high statistics measurements of electrons from {approx}20 to… more
Date: October 17, 2007
Creator: Ormes, J.F.; U., /Denver; Moiseev, Alexander & /NASA, Goddard
Partner: UNT Libraries Government Documents Department
open access

LAT Observation of GRBs: Simulations and Sensitivity Studies

Description: The GLAST Large Area Telescope (LAT) is the next generation satellite experiment for high-energy gamma-ray astronomy. It employs a pair conversion technique to record photons in the energy range from 20 MeV to more than 300 GeV. The LAT will follow the steps from its predecessor EGRET (1991-2000), and will explore the high-energy gamma-ray sky with unprecedented capabilities. The observation of Gamma-Ray Bursts is one of the main science goal of the LAT: in this contribution we compute an estim… more
Date: October 22, 2007
Creator: Omodei, Nicola; /INFN, Pisa; Norris, Jay & U., /Denver
Partner: UNT Libraries Government Documents Department
open access

GLAST LAT And Pulsars: What Do We Learn from Simulations?

Description: Gamma-ray pulsars are among the best targets for the Large Area Telescope (LAT) aboard the GLAST mission. The higher sensitivity, time and energy resolution of the LAT will provide data of fundamental importance to understand the physics of these fascinating objects. Powerful tools for studying the LAT capabilities for pulsar science are the simulation programs developed within the GLAST Collaboration. Thanks to these simulations it is possible to produce a detailed distribution of gamma-ray ph… more
Date: October 24, 2007
Creator: Razzano, Massimiliano; /Pisa U. /INFN, Pisa; Harding, Alice K. & /NASA, Goddard
Partner: UNT Libraries Government Documents Department
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