ISRO AstroSat Detects over 600 Gamma-Ray Bursts over 8 Years

India AstroSat space telescope has reached a remarkable milestone, detecting over 600 Gamma-Ray Bursts (GRBs), each signifying the demise of a massive star or the fusion of neutron stars. Dipankar Bhattacharya, the principal investigator for the Cadmium Zinc Telluride Imager (CZTI), expressed satisfaction at the sustained high performance of CZTI, even eight years post-launch and well beyond its expected lifespan.

Referred to as "mini big-bangs," GRBs stand out as the most energetic explosions in the cosmos, emitting more energy in mere seconds than the sun produces in its entire existence. Gaurav Waratkar, a Ph.D. student at IIT Bombay leading the GRB study with AstroSat, highlighted the brief yet intense nature of GRBs, lasting from fractions of a second to several minutes, often coinciding with the birth of a black hole.

Launched in 2015 by the Indian Space Research Organisation (ISRO), AstroSat was initially designed for a five-year mission but continues to operate in excellent condition, providing valuable observations for astronomers. As India premier dedicated multi-wavelength space observatory, it boasts a suite of payloads enabling simultaneous observations of celestial objects across various wavelengths, ranging from ultraviolet to X-rays.

Expressing pride in AstroSat achievements, Varun Bhalerao, an associate professor at IIT-Bombay, revealed plans for a next-generation GRB space telescope named Daksha. Collaborating institutes aim to make Daksha far superior to any existing satellite, with increased sensitivity that could achieve in just over a year what took CZTI eight years.

The 600th GRB detection by AstroSat CZTI on November 22 was promptly shared with astronomers globally. This data serves as a valuable resource for researchers exploring the extreme conditions associated with these high-energy events.

Gaurav Waratkar reflected on the significance of analyzing data from events that occurred billions of years ago, stating, "It is amazing to look at the data and have the opportunity to be the first one to view these explosions."

Since the milestone 600th GRB, the CZTI has detected three additional events, the latest occurring on Monday. The collective findings from AstroSat various instruments have contributed to over 400 peer-reviewed research articles, showcasing the telescope substantial impact on advancing our understanding of the universe dynamic phenomena.