Changes between Version 23 and Version 24 of Notes/ExampleReduction

Timestamp:

03/31/09 16:01:06 (15 years ago)

Author:

JamieStevens

Comment:

--

Notes/ExampleReduction

@@ -193 +193 @@
 without recombining the UV data first. We will attempt all three methods:
 1. invert using the MFS option as normal, then clean and restor
-1. invert using both the MFS option and the SDB option, then use mfsclean and restor
+1. invert using both the MFS option and the SDB option, then use mfclean and restor
 1. invert making a cube of all channels, then clean, restor and then make a moment map
 
@@ -330 +330 @@
 no measurements are done at frequencies higher than this.
 
-|| Central Freq (MHz) || J054003-663939 || J054125-664307 ||
+|| Central Freq (MHz) || J054003-663939 (mJy) || J054125-664307 (mJy) ||
 || 4540               || 1.0 +- 0.2     || n/a            ||
 || 4668               || 1.0 +- 0.2     || 1.0 +- 0.2     ||
@@ -342 +342 @@
 
 The sources don't appear to vary in flux much with frequency, at least within the errors of measurement. That would
-suggest that using mfclean instead of clean might not produce a different result.
+suggest that using mfclean instead of clean might not produce a different result. Let's see!
+
+To begin with we need to redo the invert stage. At this stage we need to use the SDB option as well as the MFS option,
+The SDB option adds another plane to the beam dataset which represents the change in beam with frequency. We also 
+need to make the beam 3 times the size of the area being cleaned, instead of using options=double which simply doubles
+the beam size compared to the image. To do this we need to make the image 3 times bigger than the primary beam and then
+cut the central part of the image out using imframe. Since the parameters we need to do this will be different for each
+central frequency, we will control dac_repeat.pl with a parameter file.
+