As the world celebrated the arrival of the new year, the Indian Space Research Organisation (ISRO) marked the occasion with a significant milestone – the launch of its inaugural X-Ray Polarimeter Satellite, XPoSat. In its 60th mission, the Polar Satellite Launch Vehicle (PSLV-C58) lifted off from Sriharikota in Andhra Pradesh, carrying XPoSat as its primary payload, along with 10 other satellites destined for low earth orbits.
Unveiling the Cosmic Mysteries
ISRO’s XPoSat is not just another satellite; it represents India’s first dedicated polarimetry mission designed to unravel the mysteries surrounding black holes and other celestial objects. The mission focuses on space-based polarisation measurements of X-ray emissions from exotic entities like neutron stars and black holes.
A Global Endeavour: ISRO’s Contribution in Context
While ISRO spearheads this pioneering mission, it is essential to acknowledge similar initiatives on the global stage. The United States’ National Aeronautics and Space Agency (NASA) conducted a comparable study through the Imaging X-Ray Polarimetry Explorer mission in December 2021. This mission delved into the remnants of supernova explosions, particle streams emitted by black holes, and various cosmic phenomena.
Insights from Astrophysicists
Astrophysicist Dr. RC Kapoor sheds light on XPoSat’s purpose, emphasising its role in detecting X-rays emitted by exotic objects such as neutron stars and black holes. The mission holds the promise of providing crucial data that can enhance our understanding of these enigmatic celestial entities.
Mission Highlights
1. Dynamics of Bright Astronomical X-Ray Sources
XPoSat marks India’s maiden venture into polarimetry, a specialised mission dedicated to studying the dynamics of bright astronomical X-ray sources in extreme conditions. This groundbreaking initiative is poised to contribute significantly to the global scientific community’s understanding of the cosmos.
2. POLIX Payload: Measuring Polarimetry Parameters
The primary payload, POLIX (Polarimeter Instrument in X-rays), plays a pivotal role by measuring polarimetry parameters, including the degree and angle of polarisation. Operating in the medium X-ray energy range of 8-30 keV photons of astronomical origin, POLIX aims to provide invaluable insights into the characteristics of celestial X-ray emissions.
3. XSPECT Payload: Spectroscopic Information
Complementing POLIX, the XSPECT (X-ray Spectroscopy and Timing) payload is designed to offer spectroscopic information, adding another layer of depth to the mission’s scientific objectives.
