Observations of Cygnus X-3 at 2.8 cm with a 17 arc s Beam

Autor: L. R. D'addario, M. A. Stull
Rok vydání: 1972
Předmět:
Zdroj: Nature Physical Science. 239:120-121
ISSN: 2058-1106
0300-8746
DOI: 10.1038/physci239120a0
Popis: CYGNUS X-3 was observed at 2.8 cm (10,690 MHz) on each of four days during its early September 1972 outburst using the new five-element minimum redundancy array at Stanford University1. The instrument employs equatorially-mounted 18.3 m diameter paraboloids arranged along an east-west line in such a way that their spacings include all of the first nine multiples of 19.1 m. All ten antenna pairs are operated simultaneously as multiplying interferometers, allowing immediate one-dimensional synthesis (two-dimensional rotation synthesis is also possible). At 2.8 cm the largest spacing is 7,336 wavelengths (corresponding to 17 arc s width to half-peak). At present each element contains a tunnel diode preamplifier, giving a system noise temperature of 1,000 K; the IF bandwidth is 60 MHz. Linearly polarized feeds with the electric field vector in the north-south plane were used for these observations.
Databáze: OpenAIRE
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