Scope of high-frequency time keeping in searches for short-period gamma-ray sources |
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| Authors: | M L Sapru A K Tickoo I K Kaul S K Kaul C L Bhat R K Kaul H S Rawat V K Senecha R C Rannot H Razdan |
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| Institution: | (1) Nuclear Research Laboratory, Bhabha Atomic Research Centre, Srinagar 190006, Kashmir, India |
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| Abstract: | This paper presents a novel technique to derive the absolute time of occurrence of an event with an accuracy of < 200 µs by adapting the HF time synchronization technique to correct for the aging rate and the frequency drift of a temperature-controlled quartz frequency standard. The propagation delay suffered by the HF time signals has been estimated by monitoring the clock error with respect to time signals from five broadcast stations located at distances in the range 500–3700 km from Gulmarg. Using simulated data, we further show the viability of this technique in permitting periodicity searches on timescales of ≥5 milliseconds in cosmic gamma-ray data |
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| Keywords: | time keeping gamma-ray sources atmospheric Cerenkov technique |
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