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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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 ...
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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 ...
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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 ...
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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...
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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...
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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...
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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...