Difference between revisions of "User talk:Marina"
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| − | In 1968 (10 November), Lovelace discovered period <math>P\approx 33</math> ms of the [[Crab Pulsar]].<ref name = "Comella1969" |
+ | In 1968 (10 November), Lovelace discovered period <math>P\approx 33</math> ms of the [[Crab Pulsar]].<ref name = "Comella1969"/><ref name="Lovell1973">[https://ui.adsabs.harvard.edu/abs/1973ozjb.book.....L/abstract A book:`` Out of the Zenith. Jodrell Bank 1957-1970”] Sir. Bernard Lovell, 1973, London: Oxford University Press, pp 1-255 (see page159). As a graduate student working at [[Arecibo Observatory]], Lovelace developed a [[Fast Fourier transform]] program.<ref name="Lovelace1969">[https://ui.adsabs.harvard.edu/abs/1969Natur.222..231L/abstract "Digital Search Methods for Pulsars"] 1969, R. V. E. Lovelace, J. M. Sutton, E. E. Salpeter, ''Nature'' 222 (5190), 231-233.</ref>The special code named Gallop in [[Fortran]] was adapted to run on the Arecibo Observatory's [[CDC 3000 series|CDC 3200]] computer, which had a memory of 32,000 words of 24 bit length; the code was integer-based, using half-words of 12 bits, and was able to do the fast Fourier transform of N=16,384 signal samples; the 8192 signal power values were printed out on a folded raster scan; the signal to noise ratio increases as N increases; this was the largest value of N that could be handled by the Arecibo computer.<ref name=”LovelaceTaylor2014”>[On the Discovery of the Period of the Crab Nebula Pulsar https://astro.cornell.edu/sites/people/files/CrabPeriodDiscovery1.pdf ] R.V.E. Lovelace & G. Leonard Tyler, 2012, The Observatory, V. 132, p. 186</ref>. This program helped to separate the periodic pulsar signal from the noise, and one night he discovered the period of the [[Crab pulsar]], which is approximately 33 ms (33.09 ms).<ref name = "Comella1969">[https://ui.adsabs.harvard.edu/abs/1969Natur.221..453C/abstract "Crab nebula pulsar NP 0532"] 1969, J. M. Comella, H. D. Craft, R. V. E. Lovelace, J. M. Sutton, G. L. Tyler, ''Nature'' 221 (5179), 453-454.</ref><new ref=”Lang2913”>[Astrophysical Formulae |
Space, Time, Matter and Cosmology |
Space, Time, Matter and Cosmology |
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] Kenneth R. Lang 2014, Publisher: Springer Berlin Heidelberg</ref> |
] Kenneth R. Lang 2014, Publisher: Springer Berlin Heidelberg</ref> |
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Add four "tilde"s at the end; they become your signature. T (talk) 14:08, 21 December 2020 (JST)
T (talk) 14:08, 21 December 2020 (JST)
I am using this space for temporary files - modifications for wiki
In 1968 (10 November), Lovelace discovered period \(P\approx 33\) ms of the Crab Pulsar.[1]Cite error: Closing </ref> missing for <ref> tagThe special code named Gallop in Fortran was adapted to run on the Arecibo Observatory's CDC 3200 computer, which had a memory of 32,000 words of 24 bit length; the code was integer-based, using half-words of 12 bits, and was able to do the fast Fourier transform of N=16,384 signal samples; the 8192 signal power values were printed out on a folded raster scan; the signal to noise ratio increases as N increases; this was the largest value of N that could be handled by the Arecibo computer.[2]. This program helped to separate the periodic pulsar signal from the noise, and one night he discovered the period of the Crab pulsar, which is approximately 33 ms (33.09 ms).[1]<new ref=”Lang2913”>[Astrophysical Formulae
Space, Time, Matter and Cosmology
] Kenneth R. Lang 2014, Publisher: Springer Berlin Heidelberg</ref>
References
- ↑ 1.0 1.1 "Crab nebula pulsar NP 0532" 1969, J. M. Comella, H. D. Craft, R. V. E. Lovelace, J. M. Sutton, G. L. Tyler, Nature 221 (5179), 453-454.
- ↑ [On the Discovery of the Period of the Crab Nebula Pulsar https://astro.cornell.edu/sites/people/files/CrabPeriodDiscovery1.pdf ] R.V.E. Lovelace & G. Leonard Tyler, 2012, The Observatory, V. 132, p. 186