• Using collimated CZTI as all-sky X-ray detector based on Earth occultation technique

• # Fulltext

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

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.

• # Journal of Astrophysics and Astronomy

Volume 43, 2022
All articles
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