Expected line sensitivity of the MEGA telescope

Details Expected line sensitivity of the MEGA telescope Expected line sensitivity of the MEGA telescope

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006newar..50..624z&link_type=abstract

New Astronomy Reviews, Volume 50, Issue 7-8, p. 624-628.

Astronomy and Astrophysics

Astronomy

95.55.Ka

Scientific paper

A new telescope for Medium Energy Gamma-Ray Astronomy, MEGA, is being developed for the energy band 0.4 50 MeV as a successor to COMPTEL and EGRET. MEGA records gamma rays by detecting and tracking Compton as well as pair creation events in a stack of double-sided Si-strip detectors and stopping them in a surrounding pixelated CsI calorimeter. Its goal is to improve sensitivity by at least an order of magnitude over that of COMPTEL. The extensive simulation tools compiled for the ACT Vision Mission Concept Study are applied to estimate the performance of a potential MEGA space mission. The tools allow the detailed simulation of the different background components expected for the satellite’s desired low-earth orbit. We present the expected narrow-line sensitivities of a MIDEX-sized telescope and show that a sensitivity 10 times better than that of COMPTEL is achievable.

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