Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000exa....10..499r&link_type=abstract
Experimental Astronomy, v. 10, Issue 4, p. 499-517 (2000).
Astronomy and Astrophysics
Astronomy
4
Cryogenic Equipmentelectro-Optical Instrumentation, Ground-Based Astronomy, Photon-Countingdetectors
Scientific paper
S-Cam is a cryogenic camera for ground-based astronomy using Superconducting Tunnel Junctions (STJs). It has been designed as a technology demonstrator, aiming to prove the potential of a new generation of single photon counting detectors at a ground-based telescope. The camera has a field of view of about 4.0 × 4.0 arcsec^2 and it is based on a 6 × 6 array of Ta-Al Josephson junctions, operating at about 350 mK and individually read-out. For each detected photon, the absorption position, the arrival time and the corresponding energy are measured. In this paper we provide an overview of the cryogenic detector performance, a description of the S-Cam system and a summary of the results obtained both during testing at ESTEC and during the first observations at the William Herschel Telescope in La Palma (Canary Islands, Spain). Initial astronomical results on the Crab pulsar are presented along with an outlook on future activities.
Favata Fabio
Peacock Aaron
Perryman Michael
Rando Nicola
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