An avalanche photodiode photon counting camera for high-resolution astronomy |
| |
Authors: | Oliver Ryan Mike Redfern Andrew Shearer |
| |
Institution: | (1) Department of Physics, National University of Ireland, Galway, Ireland;(2) Computational Astrophysics Group, Department of Information Technology, National University of Ireland, Galway, Ireland |
| |
Abstract: | A system is described which makes best use of the high quantum efficiency and high count rate capability of avalanche photodiodes
for high time resolution observations of optical pulsars. The use of three APDs allows simultaneous photometry of the target
and a reference star, and the monitoring of the sky background. By minimising the optical components in the light path the
optical efficiency of the system is maximised. The TRIFFID (Shearer, A., Stappers, B., O'Connor, P., Golden, A., Strom, R.,
Redfern, M., Ryan, O.: Science 301, 493–495 (2003)) and OPTIMA (Straubmeier, C., Kanbach, G., Schrey, F.: Exp. Astron. 11, 157–170 (2001)) have shown that fibre-fed APD arrays can produce excellent results. This, new, system was used on the 6m
BTA in November 2003 – results on the Crab pulsar are presented. |
| |
Keywords: | Detectors Avalanche photodiode Fibre optic Optical pulsars Photon counting |
本文献已被 SpringerLink 等数据库收录! |
|