Using the Very Large Array (VLA) and other radio telescopes to perform a parasitic Search for Extraterrestrial Intelligence (SETI).
This paper describes several attempts to utilize various radio telescopes in a manner that we term "parasitic," that is in a manner that does not interrupt or seriously impact the standard astronomical observing programs in progress at the radio observatories.  In the extreme case, only recorded astronomical data are accessed off-line, after the fact, without any burden on the observatory at all.
Tarter
J
J
Astronomy Department, University of California, Berkeley 94720, USA.
D001256:Astronomy / Q000295:instrumentation*; D003142:Communication; D003199:Computer Systems; D018559:Exobiology / Q000295:instrumentation*; D005118:Extraterrestrial Environment; D011846:Radio Waves; D012107:Research Design