I obtained this observation when I was EIS CO during the week
of 30 April
to 7 May. There was a large plume structure that passed fairly
close to disk center around 10 UT on 6 May, and I obtained observations
with Hinode and IRIS. My guess is that the plume was a remnant of an
active region, although it did occur at the boundary of a
not-very-well-defined coronal hole.
The movie below shows that the plume is quite bright in AIA
193, and this is confirmed by EIS which shows bright Fe XII 195. The
plume is therefore quite different to a standardcoronal hole plume.
AIA 171 (left) and 193 (right) movies at 5 minute
As EIS was already in eclipse season I didn't bother doing
sit-and-stare observations with the slit. Instead I broke the
observation down into 4 sections corresponding to 4 orbits:
Following some of the dynamics I've been seeing in the
sit-and-stare slit observations, I thought to run a 40" slot
sit-and-stare. The study CAM_AR0_CDS_40AS has a good line list and only
takes 200" along the slit.
Even if I say so myself, the pointing was excellent with the center of
the plume right in the center of both the rasters and the slot data.
I coordinated the IRIS observation with the planner (Hans
Courier) to match the EIS sequences I had: