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.
References in periodicals archive ?
This means that, using the VLBA, we now can accurately map the whole extent of our galaxy.
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 is operated by the National Radio Astronomy Observatory (NRAO).
The VLBA is one of several radio telescopes in a growing arsenal of instruments supporting very long baseline interferometry.
The VLBA, part of the Long Baseline Observatory, is a continent-wide radio telescope system using ten, 240-ton dish antennas distributed from Hawaii to St.
As a result, The VLBA resolves detail about a million times smaller than Fermi's Large Area Telescope (LAT) and 1,000 times smaller than NASA's Hubble Space Telescope.
The pulsar was then observed over a two-year period with the VLBA by Adam Deller, an astronomer at the Netherlands Institute for Radio Astronomy (ASTRON).
With the unique capabilities of RXTE and the VLBA, we can associate their ejection with changes that likely signaled the start of the process.
In the new study, Moran and his colleagues used the VLBA to study radio emissions produced by water molecules within a central galactic disk.
Their VLBA observations provided a distance of 6070 light-years, while previous estimates had ranged from 5800-7800 light-years.
territory and working as a single radio telescope, the VLBA has the ability to discern radio sources as small as the letters on this page from a distance of 3,000 miles.
In 2003 Greenhill's student, Paul Kondratko (Harvard University), used the VLBA to image the cool outer edge of a black-hole accretion disk about 5 light-years across in the nearly edge-on spiral galaxy NGC 3079, also in Ursa Major.