NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Impulsive EUV bursts observed in C IV with OSO-8Time sequences of profiles of the 1548 A line of C IV containing 51 EUV bursts observed in or near active regions are analyzed to determine the brightness, Doppler shift and line broadening characteristics of the bursts. The bursts have mean lifetimes of approximately 150 s, and mean increases in brightness at burst maximum of four-fold as observed with a field of view of 2 x 20 arc sec. Mean burst diameters are estimated to be 3 arc sec, or smaller. All but three of the bursts show Doppler shifts with velocities sometimes exceeding 75 km/s; 31 are dominated by red shifts and 17 are dominated by blue shifts. Approximately half of the latter group have red-shifted precursors. The bursts are interpreted as prominence material, such as surges and coronal rain, moving through the field of view of the spectrometer.
Document ID
19800058445
Document Type
Reprint (Version printed in journal)
Authors
Athay, R. G.
(High Altitude Observatory Boulder, Colo., United States)
White, O. R.
(Colorado Univ. Boulder, CO, United States)
Lites, B. W.
(Colorado, University Boulder, Colo., United States)
Bruner, E. C., Jr.
(Lockheed Research Laboratories Palo Alto, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
June 1, 1980
Publication Information
Publication: Solar Physics
Volume: 66
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NASA ORDER H-180204-B
CONTRACT_GRANT: NAS5-22409
CONTRACT_GRANT: NAS5-23657
Distribution Limits
Public
Copyright
Other
No Preview Available