Early In-orbit Performance of Scanning Sky Monitor Onboard AstroSat

  • M. C. Ramadevi
  • B. T. Ravishankar
  • N. Sitaramamurthy
  • G. Meena
  • Brajpal Singh
  • Anand Jain
  • Reena Yadav
  • Anil Agarwal
  • V. Chandra Babu
  • Kumar
  • Ankur Kushwaha
  • S. Vaishali
  • Nirmal Kumar Iyer
  • Anuj Nandi
  • Girish V.
  • Vivek Kumar Agarwal
  • S. Seetha
  • Dipankar Bhattacharya
  • K. Balaji
  • Manoj Kumar
  • Prashanth Kulshresta
Review

Abstract

We report the in-orbit performance of Scanning Sky Monitor (SSM) onboard AstroSat. The SSM operates in the energy range 2.5 to 10 keV and scans the sky to detect and locate transient X-ray sources. This information of any interesting phenomenon in the X-ray sky as observed by SSM is provided to the astronomical community for follow-up observations. Following the launch of AstroSat on 28th September, 2015, SSM was commissioned on October 12th, 2015. The first power ON of the instrument was with the standard X-ray source, Crab in the field-of-view. The first orbit data revealed the basic expected performance of one of the detectors of SSM, SSM1. Following this in the subsequent orbits, the other detectors were also powered ON to find them perform in good health. Quick checks of the data from the first few orbits revealed that the instrument performed with the expected angular resolution of 12’ \(\times \) 2.5\(^\circ \) and effective area in the energy range of interest. This paper discusses the instrument aspects along with few on-board results immediately after power ON.

Keywords

X-ray sky monitor 1D position sensitive proportional counter coded mask AstroSat X-ray transients 

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Copyright information

© Indian Academy of Sciences 2017

Authors and Affiliations

  • M. C. Ramadevi
    • 1
  • B. T. Ravishankar
    • 1
  • N. Sitaramamurthy
    • 1
  • G. Meena
    • 1
  • Brajpal Singh
    • 1
  • Anand Jain
    • 1
  • Reena Yadav
    • 1
  • Anil Agarwal
    • 1
  • V. Chandra Babu
    • 1
  • Kumar
    • 1
  • Ankur Kushwaha
    • 1
  • S. Vaishali
    • 1
  • Nirmal Kumar Iyer
    • 1
  • Anuj Nandi
    • 1
  • Girish V.
    • 1
  • Vivek Kumar Agarwal
    • 1
  • S. Seetha
    • 2
  • Dipankar Bhattacharya
    • 3
  • K. Balaji
    • 1
  • Manoj Kumar
    • 1
  • Prashanth Kulshresta
    • 1
  1. 1.Space Astronomy GroupISRO Satellite CentreBangaloreIndia
  2. 2.ISRO HeadquartersBangaloreIndia
  3. 3.Inter University Centre for Astronomy and AstrophysicsPuneIndia

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