Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21111404d&link_type=abstract
American Astronomical Society, AAS Meeting #211, #114.04; Bulletin of the American Astronomical Society, Vol. 39, p.944
Astronomy and Astrophysics
Astronomy
Scientific paper
Modern VLBI instrumentation bears little resemblence to the systems that were in use just 5 years ago. By making use of industry driven trends, VLBI has moved from recording on magnetic tape to hard disk drive systems, and has replaced analog filterbanks with digital signal processing on FPGAs. The results are significantly increased recording bandwidths at a small fraction of the cost of previous VLBI systems. When this instrumentation is deployed on the largest radio telescopes, thermal noise levels down to 1 micro Jy/beam can be achieved. The collecting area of Arecibo, in particular, lowers detection thresholds to the point where a range of high sensitivity science projects can be addressed. Among these are studies of Ultra Luminous Infrared Galaxies (ULIGs), central images of Gravitational Lens systems, late time imaging of GRB afterglow structure, and pulsar astrometry and proper motion studies. This talk will briefly touch on enabling technologies and then focus on the ongoing and potential research enabled with Arecibo-anchored VLBI arrays.
The Ultra High Sensitivity VLBI program at MIT Haystack Observatory is funded through a grant from the NSF AST division.
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