• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/042/0064

    • Keywords

       

      X-ray telescopes (1825); occultation (1148); astronomical techniques (1684).

    • Abstract

       

      All-sky monitors can measure the fluxes of astrophysical sources by measuring the changes in observed counts as the source is occulted by the Earth. Such measurements have typically been carried out by all-sky monitors like CGRO-BATSE and Fermi-GBM. We demonstrate for the first time the application of this technique to measure fluxes of sources using a collimated instrument: the Cadmium Zinc Telluridedetector on AstroSat. Reliable flux measurements are obtained for the Crab nebula and pulsar, and for Cyg X–1 by carefully selecting the best occultation data sets. We demonstrate that CZTI can obtain such measurements for hard sources with intensities $\gtrsim$1 Crab.

    • Author Affiliations

       

      AKSHAT SINGHAL1 RAHUL SRINIVASAN1 2 3 4 5 6 VARUN BHALERAO1 DIPANKAR BHATTACHARYA7 A. R. RAO3 SANTOSH VADAWALE8

      1. Indian Institute of Technology Bombay, Mumbai 400 076, India.
      2. Universite Coserete d’Azur, Nice, France.
      3. Tata Institute of Fundamental Research, Mumbai 400 005, India.
      4. CNRS, Nice, France.
      5. Laboratoire Lagrange, Nice, France.
      6. Laboratoire Artemis, Nice, France.
      7. The Inter-University Centre for Astronomy and Astrophysics, Pune 411 007, India.
      8. Physical Research Laboratory, Ahmedabad 380 009, India.
    • Dates

       
  • 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

© 2021-2022 Indian Academy of Sciences, Bengaluru.