Inauguration and first light of the GCT-M prototype for the Cherenkov telescope array

J. J. Watson, A. De Franco, A. Abchiche, D. Allan, J. P. Amans, T. P. Armstrong, A. Balzer, D. Berge, C. Boisson, J. J. Bousquet, A. M. Brown, M. Bryan, G. Buchholtz, P. M. Chadwick, H. Costantini, G. Cotter, M. K. Daniel, F. De Frondat, J. L. Dournaux, D. DumasJ. P. Ernenwein, G. Fasola, S. Funk, J. Gironnet, J. A. Graham, T. Greenshaw, O. Hervet, N. Hidaka, J. A. Hinton, J. M. Huet, I. Jegouzo, T. Jogler, M. Kraus, J. S. Lapington, P. Laporte, J. Lefaucheur, S. Markoff, T. Melse, L. Mohrmann, P. Molyneux, S. J. Nolan, A. Okumura, J. P. Osborne, R. D. Parsons, S. Rosen, D. Ross, G. Rowell, C. B. Rulten, Y. Sato, F. Sayède, J. Schmoll, H. Schoorlemmer, M. Servillat, H. Sol, V. Stamatescu, M. Stephan, R. Stuik, J. Sykes, H. Tajima, J. Thornhill, L. Tibaldo, C. Trichard, J. Vink, R. White, N. Yamane, A. Zech, A. Zink, J. Zorn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


The Gamma-ray Cherenkov Telescope (GCT) is a candidate for the Small Size Telescopes (SSTs) of the Cherenkov Telescope Array (CTA). Its purpose is to extend the sensitivity of CTA to gamma-ray energies reaching 300 TeV. Its dual-mirror optical design and curved focal plane enables the use of a compact camera of 0.4 m diameter, while achieving a field of view of above 8 degrees. Through the use of the digitising TARGET ASICs, the Cherenkov flash is sampled once per nanosecond contin-uously and then digitised when triggering conditions are met within the analogue outputs of the photosensors. Entire waveforms (typically covering 96 ns) for all 2048 pixels are then stored for analysis, allowing for a broad spectrum of investigations to be performed on the data. Two prototypes of the GCT camera are under development, with differing photosensors: Multi-Anode Photomultipliers (MAPMs) and Silicon Photomultipliers (SiPMs). During November 2015, the GCT MAPM (GCT-M) prototype camera was integrated onto the GCT structure at the Observatoire de Paris-Meudon, where it observed the first Cherenkov light detected by a prototype instrument for CTA.

Original languageEnglish (US)
Title of host publicationHigh Energy Gamma-Ray Astronomy
Subtitle of host publication6th International Meeting on High Energy Gamma-Ray Astronomy
EditorsFelix A. Aharonian, Felix A. Aharonian, Frank M. Rieger, Werner Hofmann
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414563
StatePublished - Jan 4 2017
Event6th International Symposium on High Energy Gamma-Ray Astronomy - Heidelberg, Germany
Duration: Jul 11 2016Jul 15 2016

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other6th International Symposium on High Energy Gamma-Ray Astronomy

Bibliographical note

Publisher Copyright:
© 2017 Author(s).


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