The VLA Low-frequency Sky Survey (2007)
Cohen, A. S., Lane, W. M., Cotton, W. D., Kassim, N. E., Lazio, T. J. W., Perley, R. A., ...
The Very Large Array (VLA) Low-frequency Sky Survey (VLSS) has imaged 95% of the 3*pi sr of sky north of declination = -30 degrees at a frequency of 74 MHz (4 meter wavelength). The resolution is 80"...
The 74MHz System on the Very Large Array (2007)
Kassim, N. E., Lazio, T. J. W., Erickson, W. C., Perley, R. A., Cotton, W. D., Greisen, E. W., ...
The Naval Research Laboratory and the National Radio Astronomy Observatory completed implementation of a low frequency capability on the VLA at 73.8 MHz in 1998. This frequency band offers...
Cygnus A: A Long Wavelength Resolution of the Hot Spots (2006)
Lazio, T. J. W., Cohen, A. S., Kassim, N. E., Perley, R. A., Erickson, W. C., Carilli, C. L., ...
This paper presents observations of Cygnus A at 74 and 327 MHz at angular resolutions of approximately 10" and 3", respectively. These observations are among the highest angular resolutions obtained...
AN OBSERVATIONAL STUDY OF STRONG RADIO SOURCES AT METER WAVELENGTHS. (2005)
This report reviews the present state and future plans for radio astronomy work. A very high resolution, low frequency antenna is under construction. This antenna will be two miles in length and will...
The Astronomical Low-Frequency Array (2004)
Jones, D. L., Allen, R. J., Blume, W. H., Desch, M. M., Erickson, W. C., Kaiser, M. L., ...
An array of satellites is proposed to make astronomic observations in the low frequency range of a few tens of MHz down to roughly 100 kHz, a range that cannot be observed through the ionosphere. The...
The ALFA medium explorer mission (2000)
Jones, D.L., Allen, R.J., Basart, J.P., Bastian, T., Blume, W.H., Bougeret, J.L., ...
The frequency range below a few tens of MHz is unexplored with high angular resolution due to the opacity of Earth's ionosphere. An interferometer array in space providing arcminute angular...
THE OCCULTATION OF THE CRAB NEBULA BY THE SOLAR CORONA IN JUNE, 1960. (1998)
Observations of the occultation of the Crab Nebula by the solar corona were made in June, 1960. These observations were made at the Clark Lake radio astronomy station at a wavelength of 11.4 meters....
RADIO EMISSION IN THE OUTER CORONA. (1998)
Evidence has been obtained at the Clark Lake radio astronomy station for the existence of radio emission at 26.3 mc/sec in the outer corona of the sun. Our observations indicate that an emission...
The Radio Spectral Index of the Crab Nebula (1997)
Bietenholz, M. F., Kassim, N., Frail, D. A., Perley, R. A., Erickson, W. C., Hajian, A. R.
We present the results of a new, comprehensive investigation of the radio spectral index of the Crab Nebula supernova remnant. New data at 74 MHz are combined with data at 327 MHz, 1.5 GHz and 5 GHz....
Evidence for thermal absorption inside Cassiopeia A (1995)
Kassim, N.E., Perley, R.A., Dwarakanath, K.S., Erickson, W.C.
Subarcminute resolution images of Cas A at 74 and 333 MHz are presented. Comparison with each other and with higher frequency observations indicates that the spectral index of its nonthermal emission...
Low-frequency carbon recombination lines in the central regions of the galaxy (1995)
Erickson, W.C., McConnell, D., Anantharamaiah, K.R.
We have used the Parkes 64 m telescope to study low4requency carbon recombination lines from the southern portion of the Galactic plane in a frequency band 4 MHz wide centered at 76.4 MHz. We have...
Molecular, atomic and ionized gas towards Cas-A (1995)
Kantharia, N.G., Anantharamaiah, K.R., Erickson, W.C., Payne, H.E.
Proceedings of the 6th Asian Pacific regional meeting on astronomy of the IAU, Pune, 1993.
Payne, H.E., Anantharamaiah, K.R., Erickson, W.C.
We present models of physical conditions in Perseus arm clouds observed in the direction of Cas A. Theoretical predictions of carbon radio recombination line intensities are compared with...
Anantharamaiah, K.R., Erickson, W.C., Payne, H.E., Kantharia, N.G.
We present observations of the C270 alpha carbon recombination line, 21 cm neutral hydrogen line and (12)CO (J = 1 right arrow 0) molecular line toward Cas A. A comparison of the distribution of...
Subarcminute resolution imaging of radio sources at 74 MHz with the Very Large Array (1993)
Kassim, N.E., Perley, R.A., Erickson, W.C., Dwarakanath, K.S.
A new observing system operating at 74 MHz and providing an angular resolution of 20 sec is currently being tested at the Very Large Array (VLA). The system comprises a prime-focus dipole feed and...
Interferometric Observations of Carbon Recombination lines towards Cassiopeia A at 332 MHz (1990)
Payne, H.E., Anantharamaiah, K.R., Erickson, W.C.
Restricted Access. Radio Recombination Lines: 25 Years of Investigation, Proceedings of IAU Colloq. 125, held in Puschino, USSR, September 11-16, 1989. Edited by M. A. Gordon and R. L. Sorochenko....
Payne, H.E., Anantharamaiah, K.R., Erickson, W.C.
Observations made at 10 frequencies in the 34-325-MHz range provide evidence for stimulated emission of carbon recombination lines in the direction of Cas A. Recombination lines have been detected in...
Detection of carbon recombination lines below 100 MHz towards the Galactic centre and M16. (1988)
Anantharamaiah, K.R., Payne, H.E., Erickson, W.C.
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Observation of highly excited radio recombination lines towards Cassiopeia A (1985)
Anantharamaiah, K.R., Erickson, W.C., Radhakrishnan, V.
Restricted Access.
The origin of galactic and extra-galactic radio noise /--by William C. Erickson. (1956)
Thesis (Ph. D.)--University of Minnesota, 1956.
The ALFA medium explorer mission
Jones, D.L., Allen, R.J., Basart, J.P., Bastian, T., Blume, W.H., Bougeret, J.L., ...
The frequency range below a few tens of MHz is unexplored with high angular resolution due to the opacity of Earth's ionosphere. An interferometer array in space providing arcminute angular...
The ALFA medium explorer mission
Jones, D.L., Allen, R.J., Basart, J.P., Bastian, T., Blume, W.H., Bougeret, J.L., ...
The frequency range below a few tens of MHz is unexplored with high angular resolution due to the opacity of Earth's ionosphere. An interferometer array in space providing arcminute angular...