|Mission type||Space observatory|
|Operator||Indian Space Research Organisation (ISRO)|
|Mission duration||Planned: 5 years|
|Manufacturer||Raman Research Institute, ISRO|
|Payload mass||125 kg (276 lb) |
|Start of mission|
|Launch date||November 2021|
|Altitude||circular 500 to 700 km|
|Collecting area||640 cm2 |
|Resolution||5-30 keV |
|Polarimeter Instrument in X-rays (POLIX)|
X-ray Spectroscopy and Timing (XSPECT)
The X-ray Polarimeter Satellite (XPoSat) is a planned space observatory to study polarisation of cosmic X-rays. It is planned to be launched in 2021, and to provide a service time of at least five years.
Studying how radiation is polarised gives away the nature of its source, including the strength and distribution of its magnetic fields and the nature of other radiation around it. XPoSat will study the 50 brightest known sources in the universe, including pulsars, black hole X-ray binaries, active galactic nuclei, and non-thermal supernova remnants. The observatory will be placed in a circular low Earth orbit of 500 to 700 km.
Project began in September 2017 with ISRO grant of ₹95,000,000. Preliminary Design Review (PDR) of the XPoSat including the POLIX payload was completed in September 2018, followed by preparation of POLIX Qualification Model and beginning of some of its Flight Model components fabrication.
Two payloads of XPoSat are hosted on IMS-2 platform. Primary scientific payload is Polarimeter Instrument in X-rays (POLIX), which will study the degree and angle of polarisation of bright astronomical X-ray sources in the energy range 8-30 keV. POLIX, a 125 kg (276 lb) instrument, is being developed by the Raman Research Institute. Its science objectives are to measure:
Secondary payload is XSPECT (X-ray Spectroscopy and Timing), which will give spectroscopic information of soft X-rays in the energy range of 0.8-15 keV.