Murk Bottema
Johns Hopkins University
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Featured researches published by Murk Bottema.
The Astrophysical Journal | 1998
Randy A. Kimble; Bruce E. Woodgate; Charles W. Bowers; S. B. Kraemer; Mary Elizabeth Kaiser; T. R. Gull; S. R. Heap; Anthony C. Danks; A. Boggess; Richard F. Green; J. B. Hutchings; Edward B. Jenkins; Charles L. Joseph; J. L. Linsky; Stephen P. Maran; H. W. Moos; Fred L. Roesler; J. G. Timothy; Donna E. Weistrop; J. F. Grady; J. J. Loiacono; L. W. Brown; Mark D. Brumfield; Lee D. Feinberg; M. N. Isaacs; Carolyn A. Krebs; V. L. Krueger; R. W. Melcher; F. J. Rebar; H. D. Vitagliano
The Space Telescope Imaging Spectrograph (STIS) was successfully installed into the Hubble Space Telescope (HST) in 1997 February, during the second HST servicing mission, STS-82. STIS is a versatile spectrograph, covering the 115-1000 nm wavelength range in a variety of spectroscopic and imaging modes that take advantage of the angular resolution, unobstructed wavelength coverage, and dark sky offered by the HST. In the months since launch, a number of performance tests and calibrations have been carried out and are continuing. These tests demonstrate that the instrument is performing very well. We present here a synopsis of the results to date.
Applied Optics | 1993
Murk Bottema
Reflective correctors to compensate the spherical aberration in the Hubble Space Telescope are placed in front of three of the axial scientific instruments (a camera and two spectrographs) during the first scheduled refurbishment mission. The five correctors required are deployed from a new module that replaces the fourth axial instrument. Each corrector consists of a field mirror and an aspherical, aberration-correcting reimaging mirror. In the camera the angular resolution capability is restored, be it in reduced fields, and in the spectrographs the potential for observations in crowded areas is regained along with effective light collection at the slits.
Applied Optics | 1969
Murk Bottema; William G. Fastie; H. W. Moos
One second of arc pointing accuracy has been achieved by servocontrolling the secondary mirror of a Dall-Kirkham telescope flown in an Aerobee 150 rocket. The primary mirror is weight-relieved, mounted at its nodal line and can resolve 2 arc sec. An objective LiF prism mounted near the focal plane provides a lowresolution far uv spectrum suitable for studying planetary atmospheres. Solar blind photomultiplier tubes with pulse counting electronics provide a dark current background of less than 1 count/sec. Spectra of Venus, Jupiter and eta Ursa Majoris (U Ma) were obtained in a flight from White Sands, New Mexico, on 5 December 1967. Further flights are planned with the recovered package.
The Astrophysical Journal | 1968
C.B. Opal; H. W. Moos; W. G. Fastie; Murk Bottema; R. C. Henry
Far UV spectral intensity of B3 V star from Aerobee rocket scanning prism spectrometry, noting discrepancy with model atmosphere predictions
Applied Optics | 1967
Murk Bottema
Two methods of off-set sun-tracking are described which were developed as part of the balloon-astronomy program of The Johns Hopkins University for daytime observations of the planet Venus. The performance of the system in flight, while subject to oscillations in the suspension system, is discussed.
The Astrophysical Journal | 1964
Murk Bottema; William T. Plummer; John Strong
The Astrophysical Journal | 1964
Murk Bottema; William T. Plummer; John Strong; Rodolphe Zander
Journal of Geophysical Research | 1965
Murk Bottema; William Plummer; John Strong; Rodolphe Zander
Symposium - International Astronomical Union | 1961
Murk Bottema; William Plummer; John Strong
Journal of Geophysical Research | 1967
Rodolphe Zander; Murk Bottema