This page (revision-83) was last changed on 02-Feb-2017 13:19 by David R Williams

This page was created on 27-Jan-2009 03:17 by David R Williams

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Version Date Modified Size Author Changes ... Change note
83 02-Feb-2017 13:19 43 KB David R Williams to previous
82 19-Mar-2009 13:50 41 KB David R Williams to previous | to last
81 18-Mar-2009 21:12 40 KB David R Williams to previous | to last

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TeamSciMeetingMar09
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At line 1 added 2 lines
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
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Wanted to see what else we could get out of the slots.
Compared consecutive slot and slit rasters: similar but different.
Tried to reconstruct 40 gaussians from the slit profile. A LOT of free parameters.
Each of these 40 gaussians has an amplitude, a width, a centroid, and a (constant) background. So I had to fix the parameters. I'm going to assume the same width because they all have the same temperature (it's just an assumption). Also assume that there are no Doppler shifts, that they're centred. So I just fit the amplitudes (justified on the basis of the consecutive raster).
At line 559 added one line
So, we have the raster simulated from the slot. There are differences, but remember that the raster took time to make, and the differences could be of solar origin.
At line 561 added 4 lines
* 17:05 Velocities with the slot (Louise Harra)
Using the slot plus ''TRACE'' and employing a MOSES-like technique. The velocities are very encouraging.
HEM: so it's important that TRACE co-ordinates with EIS?
At line 556 changed 3 lines
** 16:50 Flares (Ryan Milligan)
** 17:05 Very active regions (Harry Warren / John Mariska)
* 17:20 Observation Planning - Core Team proposals and HOPS (Len Culhane)
** 17:00 Flares (Ryan Milligan)
At line 569 added 72 lines
Small-FOV, high-cadence spectral images are key for good physics.
*** Line profiles from FPs during impulsive phase
*** Measure Doppler and nonthermal velocities as functions of time and temperature
*** How are line profiles related to electron beam parameters
*** n_e measurements.
Wish list:
# < 4-min cadence rasters
# moderate FOV 100 x 100
# fast exposures < 5 seconds
## (originally advertised 1 second exposures)
# line selections:
Core lines, Fe species, at least one n_e sensitive pair
# long duration observations >16 hours per day
# Max millennium ToOs
# not using the flare trigger to increase chance of catching the very early conditions
## what latency is there using the trigger anyway?
## ''seems like it's a second or two from XRT's trigger to EIS
# for RHESSI-specific observations, running EIS only during RHESSI's day?
*** People often write that a spectral window is centred on a given line. Maybe junk the red side of the window, because most high-T lines have blue shifts, but not high redshifts.
*** Are coronal HXR sources the reconnection site? EIS could measure the differences in the pre- and post-flare densities. Perhaps detect reconnection inflows around the source.
*** Observe regions __after__ they've rotated beyond the limb.
*** Impulsive EUV emission
high-cadence (1-second) 266" slot observations
*** resonant absorption of MHD waves
** 17:15 Very active regions (Harry Warren / John Mariska)
Commuted to a discussion about how we might co-ordinate prime flare observations as a test case for prime observations for all major targets.
PRY: if EIS puts a strong message that we want to do one kind of obserbvation
HPW: how do we prioritise our observations when the ARs come back?
PRY: would be good if we came up with an observation
Needs to be freedom -- want to run for long periods of time
Could there be working groups on how to build active region observations, for example? Does there need to be a meeting?
* Active regions
* Quiet Sun
* Observation Planning - Core Team proposals and HOPS (Len Culhane)
''Thursday'' 09:15
Len listed the kinds of class of observation that are proposed by the SSCs after they're gathered from proposers.
Discussions between the EIS SSCs, a more aggressive pursuit of what
HEM: I think what you said about getting feedback is important. One might think of a quick response to the data. ''Good idea''
JLC: there may be a very good reason to run a study several
AI: try to link the eis_plan file into the Wiki so that there's an RSS feed to tell people what EIS is doing.
PRY: is it worth time-limiting these plans? I've probably got enough data.
JTM: I'm a little reluctant to prioritise the 2nd tier, but run numbers would be useful. that would be self-prioritising. A little worried also about polluting the e-mail and webspace with another source of information.
''Suggest somehow placing these files on the Wiki automatically''
HEM would like to know the channel for feedback from proposers.
At line 561 changed one line
17:35
17:30
This page (revision-83) was last changed on 02-Feb-2017 13:19 by David R WilliamsTop