Credit & Copyright: R. Klebesadel, I. Strong & R. Olson
(LANL),
Vela Project
Explanation:
Gamma-Ray Bursts (GRBs)
were discovered by accident.
Thirty three years ago today, satellites
first recorded a GRB.
The data plotted here show that
the count rate of the satellite gamma-ray instrument
abruptly jumped indicating a sudden
flash of gamma-rays.
The Vela
satellites
that detected this and other GRBs were
developed to test technology to monitor
nuclear
test ban treaties.
With on board sensors they
watched for brief
x-ray and
gamma-ray flashes, the telltale signatures of
nuclear explosions.
As intended, the Velas
found flashes of gamma-rays - but not
from nuclear detonations near Earth.
Instead, the flashes were determined to come from deep space!
Dubbed "cosmic gamma-ray bursts"
they are now known to be the most powerful explosions
originating in distant galaxies.
What could power a gamma-ray burst?
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr' |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
|
Publikacii s klyuchevymi slovami:
gamma-vspleski - gamma-ray burst - explosion - vela satellite - gamma ray
Publikacii so slovami: gamma-vspleski - gamma-ray burst - explosion - vela satellite - gamma ray | |
Sm. takzhe:
Vse publikacii na tu zhe temu >> | |
