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In A Significant Milestone ISRO’s AstroSat Detects More Than 600 Gamma-Ray Bursts Over 8 Years

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In A Significant Milestone ISRO’s AstroSat Detects More Than 600 Gamma-Ray Bursts Over 8 Years


New Delhi: INDIA’S AstroSat space telescope has achieved a significant milestone by detecting more than 600 Gamma-Ray Burst (GRB), each marking the death of a massive star or merging of neutron stars. “The detection of the 600th GRB is a great demonstration of the continued undiminished performance of Cadmium Zinc Telluride Imager (CZTI) eight years after launch, and well after its design lifetime,” Dipankar Bhattacharya, the principal investigator for CZTI, said. Dubbed as mini big-bangs, GRBs are the most energetic explosions in the universe, emitting more energy in seconds than the sun will emit in its entire lifetime, Gaurav Waratkar, a Ph.D student at IIT-Bombay, who leads the study of GRBs with AstroSat, told PTI. GRBs last from a fraction of a second to several minutes, and are accompanied by the birth of a black hole. Launched in 2015 by the Indian Space Research Organisation (ISRO), AstroSat had a design life of five years, but continues to be in good health, making observations for astronomers.

The satellite is India’s first dedicated multi-wavelength space observatory, equipped with a suite of payloads for simultaneously observing celestial objects across different wavelengths, from ultraviolet to X-rays. “We are proud of what AstroSat has accomplished. To build upon this success, multiple institutes have come together and proposed to build Daksha, a next-generation GRB space telescope that will be far better than any such satellite worldwide. Daksha will be sensitive enough to detect in just over a year what CZTI did in eight,” Varun Bhalerao, associate professor at IIT-Bombay, said.

The 600th GRB detection by AstroSat’s CZTI detector was made on November 22, which was notified to astronomers across the world who could use it in their research on such a phenomenon and provide astronomers with invaluable data to explore the extreme conditions associated with these high-energy events. “It is amazing to look at the data and have the opportunity to be the first one to view these explosions that happened billions of years ago,” Waratkar said. He said since the 600th GRB, the CZTI has detected three more such events, the latest on Monday. The detection of these GRBs, science results from the various instruments on AstroSat have been published in over 400 peer-reviewed research articles.





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INS Arihant’s Nuke-Capable K-4 Submarine-Launched Ballistic Missile ‘Ready To Roll’

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INS Arihant’s Nuke-Capable K-4 Submarine-Launched Ballistic Missile ‘Ready To Roll’


NEW DELHI: India tested its nuclear capable K-4 submarine-launched ballistic missile (SLBM), designed to have a strike range of 3,500 km, for the second time in six days on Friday. The missile test, as the one conducted on January 19, was undertaken from an undersea platform in the shape of a submersible pontoon off the coast of Andhra Pradesh according to a report by Rajat Pandit of TOI.

The solid-fuelled K-4 missile is being developed by DRDO to arm the country’s nuclear-powered submarines in the shape of INS Arihant and its under-development sister vessels. INS Arihant, which became fully operational in November 2018 to complete India’s nuclear triad, is currently armed with the much shorter K-15 missiles with a 750 km range.

“The K-4 is now virtually ready for its serial production to kick-off. The two tests have demonstrated its capability to emerge straight from underwater and undertake its parabolic trajectory,” said a source.

India has the land-based Agni missiles, with the over 5,000-km Agni-V inter-continental ballistic missile now in the process of being inducted, and fighter jets jury-rigged to deliver nuclear weapons. But INS Arihant gives the country’s deterrence posture much more credibility because nuclear-powered submarines armed with nuclear-tipped missiles are considered the most secure, survivable and potent platforms for retaliatory strikes.

Once the K-4 missiles are inducted, they will help India narrow the gap with countries like the US, Russia and China, which have over 5,000-km range SLBMs. The K-4 missiles are to be followed by the K-5 and K-6 missiles in the 5,000-6,000 km range class.

The 6,000-ton INS Arihant, which is propelled by an 83 MW pressurised light-water reactor at its core, in turn, is to be followed by INS Arighat, which was launched in 2017. The next generation of nuclear submarines, currently called S-4 and S-4*, will be much larger in size.





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After Upgradation, Sukhoi Su-30MKI Indigenisation To Reach 78%

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After Upgradation, Sukhoi Su-30MKI Indigenisation To Reach 78%


India has received clearance to upgrade 84 Sukhoi Su-30MKI fighter jets, which will result in 78% indigenization after the upgrade

In a significant step towards bolstering its military might with indigenously developed technology, India is poised to witness its Russian-origin Sukhoi Su-30MKI fighter jets evolve into a domestic platform. Speaking at a recent lecture.

The upgrade program is being led by Hindustan Aeronautics Limited (HAL) in partnership with the Indian Air Force and other partners. The upgrade is expected to cost US$7.5 billion.

The Defence Acquisition Council (DAC) granted Acceptance of Necessity (AoN) for the upgrade. The upgrade is part of India’s efforts to improve the capabilities of its primary fighter aircraft, it refers to as the “Super Sukhoi”.

This initiative is a part of a larger effort by the Indian Air Force to modernize its ageing fleet. Air Chief Marshal Chaudhari asserted the critical role of an offensive air force as demonstrated in current global conflicts and emphasized India’s move towards an indigenized arsenal. To this end, the IAF has been proactive, from upgrading its Mirage 2000 to enhancing its MiG-29 fleet.

In summary, the IAF’s commitment to updating their combat forces with the latest technology, including shifting to fifth-generation fighter jets, ensures operational preparedness and a strong deterrence capability. The gradual indigenization of its air fleet marks a pivotal shift in India’s defence landscape, reducing dependency on foreign imports and fostering technological sovereignty.





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Akash Weapon System Exports For The Armenian Armed Forces Gathers Pace

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Akash Weapon System Exports For The Armenian Armed Forces Gathers Pace


According to unconfirmed reports, Armenia is a top contender for an export order for Akash SAM system manufactured by Bharat Dynamics Limited (BDL).

While there is no official confirmation because of the sensitivities involved, documents suggest that the order for the same has already been placed the report further added.
There are nine countries, in turn, which have shown interest in the indigenously-developed Akash missile systems, which can intercept hostile aircraft, helicopters, drones and subsonic cruise missiles at a range of 25-km. They are Kenya, Philippines, Indonesia, UAE, Bahrain, Saudi Arabia, Egypt, Vietnam and Algeria reported TOI.

The Akash export version will also be slightly different from the one inducted by the armed forces. The 100-km range air-to-air Astra missiles, now entering production after successful trials from Sukhoi-30MKI fighters, also have “good export potential”, said sources.

Akash is a “tried, tested and successfully inducted systems”. Indian armed forces have ordered Akash systems worth Rs 24,000 crore over the years, and MoD inked a contract in Mar 2023 of over Rs 9,100 crores for improved Akash Weapon System

BDL is a government enterprise under the Ministry of Defence that was established in 1970. BDL manufactures surface-to-air missiles and delivers them to the Indian Army. BDL also offers its products for export.

Akash Weapon System

The AWS is a Short Range Surface to Air Missile (SRSAM) Air Defence System, indigenously designed and developed by Defence Research and Development Organisation (DRDO). In order to meet aerial threats, two additional Regiments of AWS with Upgradation are being procured for Indian Army for the Northern borders. Improved AWS has Seeker Technology, Reduced Foot Print, 360° Engagement Capability and improved environmental parameters.

The project will give a boost to the Indian missile manufacturing industry in particular and the indigenous defence manufacturing ecosystem as a whole. The project has overall indigenous content of 82% which will be increased to 93% by 2026-27.

The induction of the improved AWS into the Indian Army will increase India’s self-reliance in Short Range Missile capability. This project will play a role in boosting the overall economy by avoiding outgo of precious foreign exchange to other countries, increasing employment avenues in India and encouraging Indian MSMEs through components manufacturing. Around 60% of the project cost will be awarded to the private industry, including MSMEs, in maintaining the supply chain of the weapon system, thereby creating large scale of direct and indirect employment.





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