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MAGIC sensitivity to millisecond-duration optical pulses

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arxiv 1708.07698 v2 pith:MRQPEC3F submitted 2017-08-25 astro-ph.IM astro-ph.HE

MAGIC sensitivity to millisecond-duration optical pulses

classification astro-ph.IM astro-ph.HE
keywords magicopticalcentralpulsescherenkovfastiactspixel
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The MAGIC telescopes are a system of two Imaging Atmospheric Cherenkov Telescopes (IACTs) designed to observe very high energy (VHE) gamma rays above ~50 GeV. However, as IACTs are sensitive to Cherenkov light in the UV/blue and use photo-detectors with a time response well below the ms scale, MAGIC is also able to perform simultaneous optical observations. Through an alternative system installed in the central PMT of MAGIC II camera, the so-called central pixel, MAGIC is sensitive to short (1ms - 1s) optical pulses. Periodic signals from the Crab pulsar are regularly monitored. Here we report for the first time the experimental determination of the sensitivity of the central pixel to isolated 1-10 ms long optical pulses. The result of this study is relevant for searches of fast transients such as Fast Radio Bursts (FRBs).

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