Some solar observations with the Cornell narrow-band radio polarimeter.

Abstract

view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Some solar observations with the Cornell narrow-band radio polarimeter. Cohen, M. H. ; Schiffmacher, E. R. Abstract A correlation-type radio polarimeter has been constructed at the Cornell Radio Observatory. The center frequency is 201.5 mc; bandwidth, 9 kc; antenna, a 17-foot paraboloid with crossed dipoles diplexed to give simultaneous right and left circular components. The instrument has been in partial operation since 15 December 1956, and observations have been made of the sun on both quiet and active days. This instrument has a substantially narrower bandwidth than the polarimeter used by Hatanaka et al. (1955), 100 kc at 200 mc, and the polarization measuring interferometer used by Payne-Scott and Little (1951), 150 kc at 97 mc, but to date no significant bandwidth effects have been observed. In particular, many unpolarized bursts have been seen, some of them in time association with small flares. Several outstanding events with polarizations changing rapidly with time have been recorded. Hatana~a, T., Suzu~i, S. and Tsuchiya, A. 1955, Proc. Japan Acad. 31, 81. Payne-Scott, Ruby and Little, A. G. 1951, Aust. J. Sci. Res. 4, 508. School of Electrical Engineering, Cornell University, Ithaca, N. Y. Publication: The Astronomical Journal Pub Date: July 1957 DOI: 10.1086/107490 Bibcode: 1957AJ.....62..139C full text sources ADS |