CME 19990418

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Table 1 - General Information

CME ID
Time (UT)
PA (deg)
Speed (km/sec)
Acceleration (m/sec2)
Mass (g)
Type II RB
X Flare
19990418.083005.p053s
08:30
59
475
12.4*
1.2e+15
No
Yes


Table 2 - UVCS Observation Sequence

FITS filename
PA (deg)
T i (UT)
Tf (UT)
Height (Rsun)
Slit W. (arcsec)
Exp. Time (sec)
d99.04.18.08:13:57.ovi.dat
90
08:14:50
08:21:30
1.50
27
200


08:22:14
08:28:54
1.60
27
200


08:29:42
08:38:42
1.70
27
180


08:40:49
08:49:49
1.80
27
180


08:51:48
09:03:48
2.00
27
180


09:05:59
09:20:59
2.30
27
180


09:24:04
09:49:24
2.80
27
200


09:52:12
10:26:52
3.50
27
200

UVCS Slit Position

MOVIE of UVCS Slit on LASCO Images


Table 3 - UVCS Observation Wavelength Range

FITS filename
Wave Min (A)
Wave Max (A)
d99.04.18.08:13:57.ovi.dat
1023.20
1043.70

980.400
993.400

1208.70
1220.60

975.800
979.200

1221.80
1224.90


Table 4 - UV Properties

First Obs. Max blue-shift (km/sec) Max red-shift (km/sec) Detected at (Rsun) Lines
1999/04/18 09:01 361 0 2.35, 2.90, 3.64 HILya1216
CIII977

Images

Plots and more

Two blobs with blue shift of 361 km/s and 271 km/s.


Interpretation

Front ?
Void No
Shock No
Current Sheet No
Prominence Yes
Flare O VI No
Leg No
Helix No

Comments

Transients appeared in 3 heights and only 1-2 expsosures in each height. Judging from LASCO movie, the CME front should pass the top portion of the slit but too faint to see in UVCS data.

Last Update Tue May 19 12:29:17 2009