Supernova radio pulse searches and possible improvements in sensitivity

Details Supernova radio pulse searches and possible improvements in sensitivity Supernova radio pulse searches and possible improvements in sensitivity

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220.1076m&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Mar. 15, 1978, p. 1076-1086. Research supported by the University of Glasgow, Royal Co

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6

Extragalactic Radio Sources, Light Curve, Pulsed Radiation, Radio Emission, Supernovae, Intergalactic Media, Ion Density (Concentration), Plasma Density, Red Shift, Sensitivity

Scientific paper

Sensitivity limitations involved in attempts to detect radio pulses from extragalactic supernovae and other possible sources are discussed, assuming that the intergalactic plasma density does not exceed the closure density of the universe. A study of the effects of interstellar and intergalactic dispersion and scattering leads to the suggestion that the sensitivity could be improved to a value which would make it possible to detect the isotropic release of 5 x 10 to the 39th ergs in an emission band roughly equal to the observing frequency by a supernova 100 Mpc distant. This represents a possible thousandfold sensitivity improvement over previous searches and could be achieved by using a multiple-beam array antenna to monitor 1 steradian around the north galactic pole. Within this solid angle, and assuming only nighttime observations are used, 10 observable Type I supernovae per year should occur out to 100 Mpc. Consideration of the pulse spectrum, dispersion, scattering, sky noise, and receiver availability suggests an optimum observing frequency of 250 MHz and bandwidth greater than 1 MHz.

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