# ICRC2015

July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

## FACT - Status and Experience from Three Years Operation of the First SiPM Camera

Aug 3, 2015, 12:00 PM
15m
Yangtze 1 (World Forum)

### Yangtze 1

#### World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution GA-IN

### Speaker

Adrian Biland (Eidgenossische Technische Hochschule Zurich (ETH))

### Description

The First G-APD Cherenkov Telescope (FACT) is pioneering the usage of solid state photosensors (G-APD, also known as SiPM). The 1440 pixel camera is installed in a 10m$^2$ refurbished HEGRA telescope on the Canary Island La Palma. Physics data-taking with FACT started in October 2011, few hours after installation of the camera. Since Summer 2012, FACT is operated remotely without the need of a data-taking crew onsite. During more than tree years of operation of FACT, G-APDs have proven to be very reliable. Despite operating them regularly also under very strong moonlight conditions, the G-APDs show no change in their properties or any indication for ageing. This allows FACT to have a successful monitoring program of the brightest TeV blazars in the northern hemisphere and several flare-alerts per year have been sent to the community. This presentation will describe the status of FACT and report the lessons learned about the usage of SiPM in a Cherenkov telescope from the construction and operation of FACT.
Collaboration FACT 871

### Primary author

Adrian Biland (Eidgenossische Technische Hochschule Zurich (ETH))