Application of imaging to gamma ray astronomy

In March 1986, the Mark II Iowa State camera electronics utilizing CAMAC modules interfaced to an LSI-11/73 computer was installed and tested at the Whipple Observatory. A study of the noise, gains, and spectral response of the photomultiplier tubes which comprise the camera was made. Also, detections of pulsed neutron star spin periods have provided an opportunity for tests of various techniques of signal-background discrimination. Observation have concentrated on x-ray binaries. As a preliminary step to constructing a full size camera, a new 37 element mini-camera is being constructed. Short summaries are presented on new computer equipment, testing of the Cherenkov detectors under moonlight, the construction of a muon telescope, and the design and testing of a fast trigger for the gamma ray camera system.