A systematic search for radio pulses associated with gamma-ray bursts

Details A systematic search for radio pulses associated with gamma-ray bursts A systematic search for radio pulses associated with gamma-ray bursts

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..75..153c&link_type=abstract

(Symposium on Cosmic Gamma-Ray Bursts, Toulouse, France, Nov. 26-29, 1979.) Astrophysics and Space Science, vol. 75, no. 1, Mar.

Astronomy and Astrophysics

Astronomy

14

Gamma Ray Astronomy, Radio Astronomy, Radio Bursts, Antenna Arrays, Searching, Sensitivity

Scientific paper

A systematic search for radio bursts at 151 and 408 MHz associated with cosmic gamma-ray bursts is presented. The search makes use of an automatic station in operation since July, 1976 at Medicina, Italy, containing Dicke radiometers at each frequency associated with linear array dipole, YAGI multielement and wide beam four-dipole array antennas, with a sensitivity to bursts lasting 1 sec in a bandwidth of 1 MHz around the observing frequency on the order of 10 to the -13th erg/sq cm. Analysis of the data recorded at the times of 32 gamma-ray bursts reveal the presence of a suspected radio burst within 10 min of the gamma-ray burst for 18 of the events, of which no more than 15 percent is estimated to be nonstochastically associated with the gamma events. Although improvements in the analysis of gamma-ray bursts and the coverage of radio source positions are noted to be desirable, it is concluded that at least 40 percent of gamma-ray bursts do not emit bursts of intensity greater than the system sensitivity in the VHF and UHF bands.

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