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  1. No Access

    Chapter and Conference Paper

    High Resolution Radio Source Maps at 73.8 MHz

    In 1984 Perley and Erickson proposed a 73.8 MHz 1_4 meter wavelength] observing system at the VLA site (NRAO Scientific Memo #146). They proposed a stand-alone antenna system that would feed its signals into a...

    R. A. Perley, W. C. Erickson, N. E. Kassim… in Very High Angular Resolution Imaging (1994)

  2. No Access

    Chapter and Conference Paper

    High Resolution Imaging at mm-Wavelengths with the Hat Creek Array

    The Hat Creek mm-wavelength array, operated by the Berkeley-Illinois-Maryland Association (BIMA), is undergoing an expansion to nine telescopes. The first six of these telescopes will be operational in January...

    W. C. Erickson, L. G. Mundy, A. Grossman in Very High Angular Resolution Imaging (1994)

  3. No Access

    Chapter and Conference Paper

    Radio noise near the earth in the 1–30 MHz frequency range

    Terrestrial radio interference presents a serious problem for sensitive low-frequency radio observations from space near the Earth. The interference is both narrow band and broad band. Several satelites and pl...

    W. C. Erickson in Low Frequency Astrophysics from Space (1990)

  4. No Access

    Chapter

    Interferometric Observations of Carbon Recombination Lines Towards Cassiopeia A at 332 MHz

    VLA maps of Cas A in the carbon recombination line C270α are compared with maps of neutral hydrogen 21 cm absorption and various molecular species to see whether there is any similarity. Single dish observatio...

    H. E. Payne, K. R. Anantharamaiah… in Radio Recombination Lines: 25 Years of Inv… (1990)

  5. No Access

    Article

    Steep-spectrum radio lobes near the galactic centre

    In a previous paper1 we reported the discovery of an extended steep-spectrum radio lobe located ∼34 arc min north-east of the galactic centre (the northern galactic centre lobe). Based on the similarity of the ob...

    N. E. Kassim, T. N. LaRosa, W. C. Erickson in Nature (1986)

  6. No Access

    Article

    A fast pulsar candidate in the globular cluster M28

    Hamilton, Helfand and Becker1 (hereafter termed HHB) have recently used the Very Large Array (VLA) telescope at 1,465 MHz to observe radio sources in globular clusters. These observations were primarily motivated...

    M. J. Mahoney, W. C. Erickson in Nature (1985)

  7. No Access

    Article

    Observation of highly excited radio recombination lines towards Cassiopeia A

    The absorption line at 26 MHz observed by Konovalenko and Sodin1 towards Cas A was interpreted by Blake et al.2 as the 631α recombination line due to carbon or heavier elements. This was confirmed subsequently by...

    K. R. Anantharamaiah, W. C. Erickson, V. Radhakrishnan in Nature (1985)

  8. No Access

    Article

    Ionospheric refraction in radio source observations at long radio wavelengths

    Ionospheric refraction effects encountered in radio source observations in the 30 to 75 MHz range with the Clark Lake TPT telescope are discussed. It is found that simple calibration procedures are sufficient ...

    W. C. Erickson in Journal of Astrophysics and Astronomy (1984)

  9. No Access

    Article

    First results from the Clark Lake Multifrequency Radioheliograph

    We give a brief description of the Clark Lake Multifrequency Radioheliograph which is presently used for solar research in the frequency range 20–125 MHz. We present two-dimensional images of the Sun's corona ...

    M. R. Kundu, W. C. Erickson, T. E. Gergely, M. J. Mahoney, P. J. Turner in Solar Physics (1983)

  10. No Access

    Article

    Determination of the decameter wavelength spectrum of the quiet Sun

    The Teepee Tee array of the Clark Lake Radio Observatory has been used to compare the flux of the Sun with that of the sidereal sources Tau A and Vir A at several frequencies in the range 109.0–19.0 MHz. Only ...

    W. C. Erickson, T. E. Gergely, M. R. Kundu, M. J. Mahoney in Solar Physics (1977)

  11. No Access

    Article

    Observations of the quiet Sun at meter and decameter wavelengths

    The new TeePee Tee array of the Clark Lake Radio Observatory has been used to observe the quiet Sun at 121.5, 73.8 and 26.3 MHz. The equatorial brightness distributions at all three frequencies, and the polar ...

    M. R. Kundu, T. E. Gergely, W. C. Erickson in Solar Physics (1977)

  12. No Access

    Article

    Meter and decameter wavelength positions of solar bursts of July 31–August 7, 1972

    The positional analysis of solar bursts at meter and decameter wavelengths observed during the period July 31–August 7, 1972 is presented. Most of the activity during this period was associated with the active...

    M. R. Kundu, W. C. Erickson in Solar Physics (1974)

  13. No Access

    Chapter

    Meter and Decameter Wavelength Positions of Solar Radio Bursts of July 31–August 7, 1972

    The positional analysis of solar bursts at meter and decameter wavelengths during the period July 31-August 7, 1972 is presented. The observations were taken with two arrays — a log periodic array of 16 elemen...

    M. R. Kundu, W. C. Erickson in Coronal Disturbances (1974)

  14. No Access

    Article

    Positions and motions of solar bursts at decameter wavelengths

    The positions and motions of solar bursts in the range 20 to 60 MHz have been measured by the means of a sweep-frequency grating interferometer with angular resolution of 5′ arc at 60 MHz decreasing to 15′ arc...

    M. R. Kundu, W. C. Erickson, P. D. Jackson, J. Fainberg in Solar Physics (1970)

  15. Article

    Generation of Polarized Light in the Crab Nebula

    IT does not appear to have been noted previously that the polarized light emitted by the Crab Nebula could be generated in an elementary manner. In the collisions between high-velocity clouds of presumably ion...

    W. C. ERICKSON in Nature (1957)

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