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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/011/02/0141-0150

    • Keywords

       

      time keeping; gamma-ray sources; atmospheric Cerenkov technique

    • 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

    • Author Affiliations

       

      M. L. Sapru1 A. K. Tickoo1 I. K. Kaul1 S. K. Kaul1 C. L. Bhat1 R. K. Kaul1 H. S. Rawat1 V. K. Senecha1 R. C. Rannot1 H. Razdan1

      1. Nuclear Research Laboratory, Bhabha Atomic Research Centre, Srinagar 190006, Kashmir, India

    • Dates

       
      Published
      June 1990
      Manuscript received
      25 July 1989
      Accepted
      9 December 1989

  • Journal of Astrophysics and Astronomy | News

    • Continuous Article Publication

      Posted on January 27, 2016

      Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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