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The Crab pulsar in the visible and ultraviolet with 20 microsecond effective time resolutionObservations of PSR 0531+21 with the High Speed Photometer on the HST in the visible in October 1991 and in the UV in January 1992 are presented. The time resolution of the instrument was 10.74 microsec; the effective time resolution of the light curves folded modulo the pulsar period was 21.5 microsec. The main pulse arrival time is the same in the UV as in the visible and radio to within the accuracy of the establishment of the spacecraft clock, +/- 1.05 ms. The peak of the main pulse is resolved in time. Corrected for reddening, the intensity spectral index of the Crab pulsar from 1680 to 7400 A is 0.11 +/- 0.13. The pulsed flux has an intensity less than 0.9 percent of the peak flux just before the onset of the main pulse. The variations in intensity of individual main and secondary pulses are uncorrelated, even within the same rotational period.
Document ID
19930050725
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Percival, J. W.
(Wisconsin Univ. Madison, United States)
Biggs, J. D.
(Universities Space Research Association; NASA, Goddard Space Flight Center Greenbelt, MD, United States)
Dolan, J. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Robinson, E. L.
(Texas Univ. Austin, United States)
Taylor, M. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bless, R. C.
(Wisconsin Univ. Madison, United States)
Elliot, J. L.
(MIT Cambridge, MA, United States)
Nelson, M. J.
(Wisconsin Univ. Madison, United States)
Ramseyer, T. F.
(Texas Univ. Austin, United States)
Van Citters, G. W.
(NSF, Div. of Astronomical Sciences, Washington; U.S. Naval Academy, Annapolis MD, United States)
Date Acquired
August 16, 2013
Publication Date
April 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 407
Issue: 1
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
93A34722
Funding Number(s)
CONTRACT_GRANT: NAS5-30442
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: NAG5-1613
Distribution Limits
Public
Copyright
Other

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