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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/042/0061

    • Keywords

       

      Pulsars; instrumentation; multi-wavelength astronomy.

    • Abstract

       

      The AstroSat mission carries several high-energy detectors meant for fast timing studies of cosmic sources. In order to carry out high precision multi-wavelength timing studies, it is essential to calibrate the absolute time stamps of these instruments to the best possible accuracy. We present here theabsolute time calibration of the AstroSat LAXPC instrument, utilising the broad-band electromagnetic emission from the Crab Pulsar to cross calibrate against Fermi-LAT and ground based radio observatories Giant Metrewave Radio Telescope (GMRT) and the Ooty Radio Telescope (ORT). Using the techniques of pulsar timing, we determine the fixed timing offsets of LAXPC with respect to these different instruments and also compare the offsets with those of another AstroSat instrument, CZTI.

    • Author Affiliations

       

      AVISHEK BASU1 2 DIPANKAR BHATTACHARYA3 BHAL CHANDRA JOSHI2

      1. Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester M13 9PL, UK.
      2. National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Ganeshkhind, Pune 411007, India
      3. Inter University Centre for Astronomy and Astrophysics, Post Bag 4, Pune 411 007, India.
    • Dates

       
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