Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.9331s&link_type=abstract
American Astronomical Society Meeting 210, #93.31; Bulletin of the American Astronomical Society, Vol. 39, p.216
Astronomy and Astrophysics
Astrophysics
Scientific paper
NASA's Gamma ray Large Area Space Telescope is scheduled for launch in late 2007 or early 2008. Although designed primarily to meet astrophysical objectives GLAST has considerable solar capabilities. The primary instrument is the Large Area Telescope (LAT) that provides imaging/spectroscopy from 30 MeV to >100 GeV with the greatest sensitivity ever achieved. With this range in energy the LAT can study the highest energy ions and electrons that are accelerated and interact at the Sun. During normal operations it will observe the Sun for about 20% of each orbit; during periods of high activity a Target of Opportunity mode can increase this coverage to about 60%. The Gamma ray Burst Monitor (GBM) complements the LAT and will provide full solar coverage during daylight from 10 keV to 25 MeV with moderate resolution spectrometers. These high-energy measurements can be compared with those made by RHESSI, ACE, Stereo and ground-based neutron monitors and muon telescopes . Objectives of the solar studies include: measurement of the spectra of flare-accelerated particles to energies >10 GeV/nuc; localization of the source of >1 GeV photons to 30 arcsec; study of trapping and continuous acceleration of high-energy ions from minutes to hours; determining the relationship between flare accelerated ions and electrons with those measured in SEPs; study of solar modulation in the inner heliosphere by observing pion-decay gamma-rays resulting from cosmic-ray interactions in the photosphere and inverse Compton scattered photons from cosmic-ray electron interactions on sunlight. This work is funded in part by NASA grant NNG06GG14G.
GLAST Sources in the Solar System Science Team
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