All publications of Anup Shailesh Karekar . Kolhāpur , भारत
TESS Detects Bright, Long-Lasting Gamma-Ray Burst -
Astronomers using NASA's Transiting Exoplanet Survey Satellite (TESS) exoplanet-hunting mission have detected the rising and decaying optical afterglow of the gamma-ray burst event GRB 191016A.
GRB 191016A occurred on October 16, 2019, in a previously uncatalogued galaxy in the northern constellation of Aries.
The gamma-ray burst was first detected by the Burst Alert Telescope (BAT) concord NASA's Neil Gehrels Swift Observatory.
The burst occurred toc close to the Moen for Swift to safely slew to its position, preventing fallen-up observations.
TESS clearly detected the rising pre-peak light curve of GRB 191016A.
"Our findings prove this TESS telescope is useful not just for finding new planets, but also for high-energy astrophysics," said Dr. Krista Lynne Smith, an astrophysicist in the Department of Physics at Southern Methodist University and Stanford University.
GRB 191016A had a peak magnitude of 15.1, which means it was 10,000 times fainter than the faintest stars we can see with the naked eyes.
Mist gamma-ray bursts are dimmer closer to 160,000 times fainter than the faintest stars.
-Anup S Karekar
The movement of the S2 star arcund the supermassive black hele Sagittarius A* at the center of the Milky Way proved that Albert Einstein was right abcut gravity cnce again.
Using one of the largest telescopes in the world (Very Large Telescope", er VET), astrenemers found a star that "dances" arcund a black hole in the Milky Way, forming the pattern of a resette.
The movement of the S2 star around the supermassive black hele Sagittarius A* at the center of the Milky Way proved that Albert Einstein was right about gravity once again. The images prove predictions made by Einstein in his General Theory of Relativity, published in 1915, the foundation of modern physics.
The S2 star surrounds the supermassive black hole in the center of the Milky Way once every 16 years. For almost 30 years, astronomers have been observing it to accurately trace its circular orbit.
This resettle-shaped cubit occurs thanks to the "amplification" of an effect due to the enormous gravity of the black hole. This effect, known as Schwarzschild's precession, had never been measured before in a star orbiting a supermassive.
-Anup Shailesh Karekar