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Astrosat [ISRO]

AstroSat is an Indian astronomical observatory satellite.

After the successful performance of the satellite-borne Indian X-ray Astronomy Experiment (IXAE), launched aboard Indian IRS-P3 satellite on 21 March 1996, Indian Space Research Organization (ISRO) has approved instrument development for a full fledged astronomy satellite, named ASTROSAT, for timing, spectral and imaging studies of celestial sources over a wide spectral band. A large number of leading astronomy research institutions in India and abroad are jointly building various instruments for the satellite.

The scientific objectives of ASTROSAT mission are:

  • To understand high energy processes in binary star systems containing neutron stars and black holes
  • Estimate magnetic fields of neutron stars
  • Study star birth regions and high energy processes in star systems lying beyond our galaxy
  • Detect new briefly bright X-ray sources in the sky
  • Perform a limited deep field survey of the Universe in the Ultraviolet region

AstroSat carries the following instruments.

  • Ultraviolet Imaging Telescope (UVIT) for visible rays in the energy range 350-600 nm and UV rays in the energy range 130 – 300 nm.
  • Large Area Xenon Proportional Counter (LAXPC) for Hard X-rays in the energy range of 3 – 100 keV.
  • Soft X-Ray Telescope (SXT) for soft X-rays in the energy range 0.3 – 10 keV.
  • Cadmium-Zinc-Telluride imager (CZTI) for Hard X-rays in the energy range of 10 – 100 keV.
  • Scanning Sky Monitor (SSM) for survey of sky in the energy range of 2 – 10 keV.
  • Charge Particle Monitor (CPM) to detect high energy particles during the satellite orbital path and alert the instrumentation

ASTROSAT was launched into space by ISRO launcher PSLV-XL in September 2015.

Nation: India
Type / Application: Astronomy, ultraviolet and X-Ray
Operator: ISRO
Contractors: ISRO
Configuration: IRS-1 Bus
Propulsion: 8 times; 11 N hydrazine monopropellant thrusters
Power: 2 deployable solar arrays, batteries
Mass: 1513 kg; 1470 kg (dry)
Orbit: 650 km × 650 km, 6
Satellite COSPAR Date LS Launch Vehicle Remarks
AstroSat 2015-052A 28.09.2015 Sr FLP PSLV-XL with LAPAN A2, exactView 9, Lemur-2 1, Lemur-2 2, Lemur-2 3, Lemur-2 4

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