Zobrazeno 1 - 10
of 84
pro vyhledávání: '"W. C. Erickson"'
Autor:
B. Hicks, W. C. Erickson, Henrique R. Schmitt, Eric W. Greisen, T. J. W. Lazio, A. S. Cohen, Debora M. Katz, Richard A. Perley, W. D. Cotton, N. E. Kassim
Publikováno v:
The Astrophysical Journal Supplement Series. 172:686-719
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 unprecedented sensitivity (~25 mJy/beam) and resolution (~25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dd37a2aca3a34e4f3b9a414f9424445
https://doi.org/10.1086/519022
https://doi.org/10.1086/519022
Autor:
P. C. Crane, W. C. Erickson, Chris Carilli, Richard A. Perley, T. J. W. Lazio, N. E. Kassim, A. S. Cohen
Publikováno v:
The Astrophysical Journal. 642:L33-L36
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 below 1000 MHz for this object. While the angular r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99a1643a07dd98dd8d3f018d8fc5383c
https://doi.org/10.1086/504408
https://doi.org/10.1086/504408
Autor:
Brian C. Hicks, Namir E. Kassim, P. C. Crane, Paul S. Ray, W. C. Erickson, K. P. Stewart, R.F. Bradley
Publikováno v:
Planetary and Space Science. 52:1351-1355
We are developing and testing active baluns and electrically short dipoles for possible use as the primary wide band receiving elements in the low-frequency array (LOFAR) for long wavelength radio astronomy. Several dipoles of various designs and dim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::473dccc72dc74186a19ae6f93a8e73cb
https://doi.org/10.1016/j.pss.2004.09.014
https://doi.org/10.1016/j.pss.2004.09.014
Publikováno v:
Symposium - International Astronomical Union. 199:447-454
The NRL and the NRAO have jointly implemented a low frequency capability on the Very Large Array. Operating at 73.8 MHz, this new frequency band offers unprecedented sensitivity (∼ 25mJy/beam) and resolution (∼ 25″). This paper briefly describe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e84c175fdb45d7a69a7726482c711eda
https://doi.org/10.1017/s0074180900169554
https://doi.org/10.1017/s0074180900169554
Publikováno v:
Astronomy & Astrophysics. 366:1071-1080
We have conducted an experiment to evaluate the usefulness of ionospheric data produced using the Global Positioning System (GPS) for making Faraday rotation and interferometer phase corrections at the NRAO Very Large Array (VLA). Four GPS receivers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b69c91482074bdcdc6972ff50bd903a
https://doi.org/10.1051/0004-6361:20000359
https://doi.org/10.1051/0004-6361:20000359
Publikováno v:
Astronomy & Astrophysics. 365:294-300
We consider the calibration of flux densities of radio bursts from decametric to kilometric wavelengths using ground-based and space-based data. The method we derive is applicable to low-frequency radio telescopes where galactic background radiation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f5aa7a7f2adff94f4ac31130e0c1b65
https://doi.org/10.1051/0004-6361:20000006
https://doi.org/10.1051/0004-6361:20000006
Autor:
K. S. Dwarakanath, W. C. Erickson, J. L. Bougeret, M. J. Reiner, K. W. Weiler, Stephen C. Unwin, Timothy S. Bastian, William M. Farrell, Robert J. MacDowall, R. G. Stone, Brian Dennison, Graham Woan, P. Rodriguez, R. E. Howard, Namir E. Kassim, W.H. Blume, Richard A. Perley, Nat Gopalswamy, Richard Woo, Ronald J. Allen, D. L. Jones, T. B. H. Kuiper, Robert A. Preston, M. L. Kaiser, D.G. Finley, J. P. Basart, Michael D. Desch, M. J. Mahoney
Publikováno v:
Advances in Space Research. 26:743-746
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 resolution images at frequencies of a few MHz would allow a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03e34739b059f08fe2e8784aa5a7e553
https://doi.org/10.1016/s0273-1177(99)01204-1
https://doi.org/10.1016/s0273-1177(99)01204-1
Autor:
W. C. Erickson
Publikováno v:
Publications of the Astronomical Society of Australia. 14:278-282
A radio spectrometer has been built on Bruny Island, south of Hobart, for the study of solar bursts in the rarely observed frequency range from 3 to 20 MHz. This spectrometer is an adaptive device that employs digital techniques to avoid most of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47d68b098cd6c79a7e9f1cb856080dd7
https://doi.org/10.1071/as97278
https://doi.org/10.1071/as97278
Publikováno v:
Symposium - International Astronomical Union. 158:243-246
In 1984 Perley and Erickson proposed a 73.8 MHz [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 an existing spare channel of the VLA wavegu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::404aaa2c59b51ef7014d84251c64f809
https://doi.org/10.1017/s0074180900107685
https://doi.org/10.1017/s0074180900107685
Autor:
H. V. Cane, W. C. Erickson
Publikováno v:
Radio Science. 36:1765-1767
A 10 MHz map of a large portion of the galaxy has been obtained by combining results from three separate surveys. The approximate resolution of the map is 5°. Although the map was produced over 20 years ago, it has not previously been published. Now
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d80865831946e42c67a1675e4970e7b
https://doi.org/10.1029/2000rs002463
https://doi.org/10.1029/2000rs002463