Evans, David Stanley, 1916 - 2004 (astronomer)
Found in 22 Collections and/or Records:
Charts and observations of Omega Centauri, 1961
Charts and observations of the globular cluster Omega Centauri. There is also a reprint from 'Monthly Notices of the Astronomical Society of Southern Africa' of a piece by D.S. Evans on the limitations in accurately determining radial velocities.
Correspondence with D.S. Evans, 1964-01-31 - 1964-02-17
Correspondence between Sir Richard Woolley and D.S. Evans regarding Evans's examination of the spectroscopic material available on southern RR Lyrae stars, etc.
Correspondence with D.S. Evans, 1964-05-29
Correspondence between Sir Richard Woolley and D.S. Evans regarding Evans's proposed visit to the Royal Greenwich Observatory.
Correspondence with D.S. Evans, 1963-08-05 - 1963-08-26
Correspondence between Sir Richard Woolley and D.S. Evans regarding the use of the grating on three Newtonian plates and the problems associated with this.
Correspondence with D.S. Evans, 1967-08-29 - 1967-09-01
Correspondence between Sir Richard Woolley and D.S. Evans of the Royal Cape Observatory regarding a marked preferential tendency for random observations of variables to land near maximum or minimum velocity.
Correspondence with R.H. Stoy, 1964-01-07
Correspondence between Sir Richard Woolley and R.H. Stoy regarding Woolley's request for spectra of RR Lyrae variables in Omega Centauri, and including comments on the subject by D.S. Evans.
Letter from D.S. Evans, 1963-07-24
A letter from D.S. Evans to R.H. Stoy regarding signs of astigmatism in the telescope at the Radcliffe Observatory, Pretoria, and the need to take corrective action, with discussion of matters relating to the use of the grating.
Letter from D.S. Evans, 1964-02-25
A letter from D.S. Evans of the Royal Observatory, Cape of Good Hope, to Sir Richard Woolley regarding charts of Omega Centauri and the discovery of an eclipse variable.
Letter from D.S. Evans, 1964-04-15
A letter from D.S. Evans to Sir Richard Woolley regarding the RR Lyrae Stars in Omega Centauri, the astigmatism in the 74-inch mirror and other matters.
Letter from D.S. Evans, 1965-05-07
A letter from D.S. Evans to Sir Richard Woolley regarding the star HD 64096 = ADS 6420 and giving possible references to it.
Letter from D.S. Evans, 1963-09-06
A letter from D.S. Evans to Miss A.R. Hewerdine, Private Secretary to Sir Richard Woolley, regarding the consideration of the grating plates sent to Woolley from the Royal Observatory, Cape of Good Hope.
Letter from D.S. Evans, 1967-09-19
A letter from D.S. Evans to Sir Richard Woolley regarding the number of observations necessary for the determination of the radial velocity of an A-star.
Letter from R.H. Stoy, 1965-06-23
A letter from R.H. Stoy to Sir Richard Woolley regarding alterations to a paper by D.S. Evans titled 'Fundamental Data for Southern Stars'.
Letter from T. Lloyd Evans, 1972
A photostat of a handwritten letter from T. Lloyd Evans, 25 August 1972, Royal Observatory, Edinburgh, to D.W.N. Stibbs, regarding the state of British optical astronomy and telescope design needs.
Letter to D.S. Evans, 1964-03-31
A letter from Sir Richard Woolley to D.S. Evans regarding the astigmatism in the 74-inch mirror and obtaining the spectrum of the variable in Omega Centauri.
Letter to D.S. Evans, 1965-05-04
A letter from Sir Richard Woolley to D.S. Evans of the Royal Observatory, Cape of Good Hope, regarding radial velocities of HD 64096 = ADS 6420 = Beta101.
Letter to D.S. Evans, 1967-08-22
A letter from Sir Richard Woolley to D.S. Evans at the XIII General Assembly of the International Astronomical Union, Právnická Fakulta Karlovy University, Prague, regarding the risk of obtaining a wrong velocity dispersion from a set of stars observed over a six-week run, on account of undetected spectroscopic binaries.
Letter to R.H. Stoy, 1965-06-11
A letter from Sir Richard Woolley to R.H. Stoy regarding a paper by D.S. Evans titled 'Fundamental Data for Southern Stars'.
Papers on the Cape Observatory, 1963 - 1968
Papers on the Newtonian spectrograph, 1962 - 1963
Correspondence between the Royal Greenwich Observatory and Dr David Evans of the Royal Observatory, South Africa, regarding the Newtonian spectrograph and Evans's paper on this subject, 'Trial Observations with a Newtonian Spectrograph', a copy of which is included in the envelope. There are also photographs of equipment and spectra.
Papers on the Radcliffe Observatory, 1935 - 1951
Report on extra-galactic spectroscopy, 1963-10-25
'Interim Report on the Progress of Extragalactic Spectroscopy in the South' by D.S. Evans of the Royal Observatory, Cape of Good Hope.