Abstract
view Abstract Citations (2) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Preliminary Results with a Maser Radiometer at λ3.45cm Bair, M. E. ; Barrett, A. H. ; Cook, J. J. ; Cross, L. G. ; Terhune, R. W. Abstract level ruby maser radiometer operating at 8700 Mc has been built by the Willow Run Laboratories and installed on the University of Michigan 85-foot radio telescope. The bandwidth is 8 Mc, as restricted by the post-amplifiers, with a maser gain of 20 db. The rms fluctuations observed are 0.05 ~0.0t 0K with an integration time of 2 sec. A liquid nitrogen temperature calibration has been incorporated. Continuous operation at liquid helium temperatures for a period of t3 hr has been obtained. The radio source Hydra A (IAU09StA) has been observed with an antenna temperature of 0.45 ~0.100K corresponding to a point source flux of 4.8X10-26 w m-2 (c/s)-1 at 8700 Mc with a tentative error of 30%. %. Publication: The Astronomical Journal Pub Date: 1960 DOI: 10.1086/108068 Bibcode: 1960AJ.....65Q.340B full text sources ADS |
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