VLBA


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VLBA

Abbrev. for Very Long Baseline Array. A dedicated VLBI array run by the US National Radio Astronomy Observatory. It consists of ten identical dishes, each with a diameter of 25 meters, and a 20-station correlator (see correlation receiver); observations began in 1993. The dishes are at St Croix, VI, Hancock, NH, Liberty, IA, Fort Davis, TX, Los Alamos, NM, Pie Town, NM, Kitt Peak, AZ, Owens Valley, CA, Brewster, WA, and Mauna Kea, HI, giving a maximum baseline of 8600 km. The array is controlled remotely from a joint VLBA and VLA Array Operations Center in Socorro, New Mexico. It can observe in nine frequency bands between 327 MHz and 43 GHz, giving an angular resolution of up to 0.2 milliarcseconds. The dishes themselves are usable up to 86 GHz.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive ?
VLBA made these measurements in 2014 and 2015, NRAO said.
Despite predicted FRB rates as high as 10,000 per day, the VLA and VLBA teams don't expect to find many bursts--one or two at most.
The VLBA observations were even able to discern the orbital motion of the pulsar around its as-yet undetected companion object, despite this motion being no larger than a small coin observed at a tenth of the distance to the Moon.
The VLBA is one of several radio telescopes in a growing arsenal of instruments supporting very long baseline interferometry.
"What we've been able to do is a true technical achievement over this 12-year period using the VLBA to achieve sufficient resolution and precision in the astrometry to actually see the orbit happening.
The latest research, which Taylor and his colleagues are reporting in the Astrophysical Journal, incorporates new VLBA observations from 2009 and 2015, along with re-analysis of the earlier VLBA data.
Neff and her colleagues homed in on this region, dubbed "Source A," with the Very Large Baseline Array (VLBA), a continent-wide network of 10 radio telescopes.
A team of astronomers using the National Science Foundation's Very Long Baseline Array (VLBA) has now observed one such weirdness - an encounter between two galaxies that shredded the smaller one to its very core, leaving behind a "nearly naked" supermassive black hole.
Later observations from the telescopes of the European VLBI network (EVN) and the Very Long Baseline Array (VLBA) in the USA revealed two distinct knots of radio emission.
Washington, January 8 ( ANI ): Using a combination of data from NASA's Fermi Gamma-ray Space Telescope and the National Science Foundation's Very Long Baseline Array (VLBA), astronomers have zeroed in on the source of the months-long blast of energy launched by an enormous black hole almost 11 billion years ago swept past Earth in 2011.
Some of RadioAstron's bands overlap ones observed with the NRAO's Very Long Baseline Array, but while astronomers have used the VLBA to look at M87's core, the higher frequencies are needed to peer deeply at black holes.