Gamma Ray Telescope

A balloon-borne astrophysics experiment of the early 1970s.

Telescope design by Ken Greisen, et al.

3d Model © S. Ball, July 2007

Designed for use with Celestia v1.5.0pre3 or later.

grt distant
grt close
grt: jun 1970
view from rear (showing alignment w/M1)
m1 on axis
1971 Oct 6 10:11 UT
Sunrize at ~ 12:00 UT
13:09 UT (elev = 60 degrees)
1971 Oct 6 13:40 UT

For more information about the telescope, see
"Performance of a gas-Cherenkov gamma-ray telescope"
D. Koch†, S. E. Ball, Jr. , M. Campbell, J. P. Delvaille+, K. Greisen and B. McBreen§
G. G. Fazio, D. R. Hearn+, ** and H. F. Helmken
Nuclear Instruments and Methods
Volume 108, Issue 2, 15 April 1973, Pages 349-353