[A NASA / University Joint Venture in Space Science]

Details [A NASA / University Joint Venture in Space Science] [A NASA / University Joint Venture in Space Science]

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996nasa.reptq....w&link_type=abstract

Technical Report, NASA/CR-97-205886; NAS 1.26:205886 Dept. of Physics and Astronomy

Astronomy and Astrophysics

Astronomy

Gamma Ray Observatory, Gamma Ray Telescopes, Radiation Detectors, Diffuse Radiation, Density Distribution, Cosmic Ray Showers, Water, Surveys, Sensitivity, Photons, Interstellar Matter, Interstellar Gas, Gamma Rays, Galaxies, Energy Technology

Scientific paper

MILAGRO is a water-Cherenkov detector for observing cosmic gamma rays over a broad energy range of 100 GeV to 100 TeV. MILAGRO will be the first detector that has sensitivity overlapping both air-Cherenkov and air-shower detectors. With this detector scientists in the collaboration will study previously observed celestial sources at their known emission energies, extend these observations into a new energy regime, and search for new sources at unexplored energies. The diffuse gamma-radiation component in our galaxy, which originates from interactions of cosmic rays with interstellar gas and photons, provides important information about the density, distribution, and spectrum of the cosmic rays that pervade the interstellar medium. Events in the Compton Gamma Ray Observatory (GRO) are being observed up to about 30 GeV, differing by slightly more than order of magnitude from the low energy threshold of MILAGRO. By looking in coincidence at sources, correlated observations will greatly extend the astrophysics potential of MILAGRO and NASA's GRO. A survey of cosmic-ray observatories is being prepared for scientists and others to provide a resource and reference which describes high energy cosmic-ray research activities around the world. This summary presents information about each research group, such as names of principal investigators, number of persons in the collaboration, energy range, sensitivity, angular resolution, and surface area of detector. Similarly, a survey of gamma-ray telescopes is being prepared to provide a resource and reference which describes gamma-ray telescopes for investigating galactic diffuse gamma-ray flux currently observed in the GeV energy range, but is expected to extend into the TeV range. Two undergraduate students are compiling information about gamma-ray telescopes and high energy cosmic-ray observatories for these surveys. Funding for this project was provided by the Arkansas Space Grant Consortium. Also enclosed Appendix A, B, C, D and E.

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