The energetic transient array-ETA-A network of ``space buoys'' in solar orbit for observations of gamma-ray bursts

Details The energetic transient array-ETA-A network of ``space buoys'' in solar orbit for observations of gamma-ray bursts The energetic transient array-ETA-A network of ``space buoys'' in solar orbit for observations of gamma-ray bursts

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..211..365r&link_type=abstract

High-Energy Astrophysics in the 21st Century. AIP Conference Proceedings, Volume 211, pp. 365-380 (1990).

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

The Energetic Transient Array (ETA) is a concept for a dedicated interplanetary network of ~40 microsatellites (``space buoys'') deployed in an ~1 AU radius solar orbit for the observation of cosmic gamma ray bursts (GRBs). Such a network is essential for the determination of highly accurate (~0.1 arc sec) error boxes for GRBs. For each of ~100 bursts which would be detectable per year of observation by such a network, high resolution (ΔE/E ~0.2% at 1 MeV) spectra could be obtained through the use of passively-cooled Ge gamma-ray detectors. Stabilization of each microsatellite would be achieved by a novel technique based on the radiation pressure exerted on ``featherable'' solar paddles. Because of the simplicity of the microsats, as well as the economics of mass production and the failure tolerance of such a network of independent satellites, a unit cost of ~$250 K per microsat can be anticipated. Should such a project be undertaken in the mid 1990's, possibly as an International mission, it should be possible to have a fully functional array of satellites in place before the end of the decade for a total cost of ~$20M, exclusive of launcher fees.

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