A coordinated observation of a bright point within a coronal hole was obtained between 10 and 18 UT on 21 December 2013. All three Hinode instruments participated as well as IRIS.
EIS obtained 126 rasters with the study SK_qs_34x168c, beginning at 10:10 and with the last at 17:22. The raster covers 34" x 168" with the 2" slit and 20s exposures. A context raster (PRY_slot_context_v3) was run at the beginning and end of the sequence.
IRIS took 30" x 119" rasters with 2.01" steps (so 16 positions) and
a cadence of 266s.
The image below shows the bright point that was selected as the
target. The image is from the AIA 193 filter at around 17:00 on
20-Dec-2013.
By the time the observation started, the bright point had faded significantly with only two weak BPs at this location remaining. However, a bright BP had appeared around 00 UT (21-Dec) directly to the south of the original BP and so this was the dominant BP during the coordinated observation. The movie below (obtained using Helioviewer) shows the evolution from 17:00 (20 Dec) to 12:00 (21 Dec).
Helioviewer
AIA 193 movie (2 MB)
A cutout movie from the A193 filter is available below. The field of view is 150 x 250 pixels, and the cadence is 1 minute.
AIA 193 movie (log intensity, 8 hours, 9 MB)
There is no obvious jet coming from the main bright point (which is in the center of the raster, slightly to the right) during the 8 hour movie.
There is a nice little jet about 30" north of the BP at about 14:55 UT. This is partly in the EIS FOV.
The movie below shows intensity and velocity images derived from the Fe XII 195 line for all 126 EIS rasters. The log of the intensity is shown, and velocities are shown between -20 and +20 km/s.
EIS Fe XII 195 movie (5 MB)
From the main BP there is some activity in the Dopplergram from 11:58 to 12:18 UT, although there no obvious correlation with the A193 intensity images at this time.
IRIS was in its eclipse season, so the observation consisted of five
distinct observation periods. The following links go to Javascript
movies for each of the five periods, showing 1400 slitjaw movies (these
movies are held at LMSAL).
Movie 1, 10:21-11:06 UT
Movie 2, 11:58-12:43 UT
Movie 3, 13:36-14:21 UT
Movie 4, 15:17-16:02 UT
Movie 5, 16:54-17:39 UT
It can be seen that the IRIS pointing drifts during these movies, an effect due to the IRIS eclipse season.
The bright point at the center of Movie 1 is actually part of the
original bright point. The newer bright point which is larger and
brighter in the A193 images is further to the south and not especially
prominent in the 1400 slitjaw images. Small scale jetting activity is
clearly seen in the slitjaw images, but unfortunately it is just
outside the IRIS rasters.
Page maintained by Dr Peter Young.