Nobeyama Radioheliograph Event 19990827_0530

EventID : 19990827_0530
Keyword : ejection+burst
Observer : KH
Start : 1999-08-27 05:00
End : 1999-08-27 06:00
Position: N24W90
Maximum Correlation @17GHz (x10^-4) : 40
Maximum Brightness Temperature @17GHz : 7.3e4 K
GOES:
NOAA Number: 8668

The sigmoid AR 8668 became active, while it was going over the NW limb.

A small burst occurred around 05:30 UT in the sigmoid AR, following a surge-like ejection.
ARs #8673 and #8674 located at S22E01 are still most active. A right circular-polarized burst was observed at 01:29:47-01:49:38 UT in these ARs.

FOV of the box is 491" x 491".

Time evolution of the maximum Tb.
The solid line shows Max (R+L) and the dotted line shows Max (R-L).
Data points are plotted every 10 min.

Stokes I (R+L) map in the box. The brightness is normalized to 3.e4 K.
Mpeg movie (10 min. interval)

The sigmoid eruption was observed around 22:00UT on August 26 by CDS/SOHO.
This figure is a part of a report from Dr. William Tompson.