Astrophysical applications of high angular resolution array-telescopes

Details Astrophysical applications of high angular resolution array-telescopes Astrophysical applications of high angular resolution array-telescopes

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....3..465l&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 3 p 465-468 (SEE N85-34862 23-93)

Computer Science

Angular Resolution, Arrays, Cosmic Ray Showers, Galactic Cosmic Rays, Gamma Ray Bursts, Particle Telescopes, Radiation Detectors, Scintillation Counters, Signal To Noise Ratios, Solar Magnetic Field, Geomagnetism, Interplanetary Magnetic Fields, Magnetic Spectroscopy, Space Stations

Scientific paper

The air shower array-telescopes which are currently being used to search for and study point sources of UHE gamma-rays have angular resolution similar to 1 deg, limited by either the small total area of particle detectors or poor timing resolution. As the signal to noise ratio depends sensitively on the angular resolution, it seems certain that this figure will quickly be surpassed when second generation instruments come into operation. Since the trajectories of galactic cosmic rays with E 100,000 GeV are practically straight lines on scales of 1 A.U. or less, these new instruments will be able to observe a shadow cast by the Moon (angular diameter 0.5 deg). Although the angular diameter of the Sun is practically the same, its shadow will be more complex because of its magnetic field. Thus, high angular resolution observations of the Sun afford a means of investigating the solar magnetic field, and also the charge composition of cosmic rays, including the ratio of antiprotons to protons.

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