Changes between Version 50 and Version 51 of Durham_MDS_Testing

Timestamp:

Aug 21, 2009, 6:04:35 AM (17 years ago)

Author:

shaun.cole@…

Comment:

--

Durham_MDS_Testing

@@ -128 +128 @@
 == Stacking tests ==
 
-To test the problems with the stack, Peter Draper and I have repeated the stacking of MD08 r-band skycell 041 using STARLINK software. This stack has 25 input warps - unfortunately for some unknown reason two were missing from Durham's data bundle, so we have only been able to stack 23. Shown below, from left to right, are crops from: TOP ROW - the original IPP stack (seeing 2.0" FWHM); a STARLINK median clipped stack where the warps have been smoothed with a Gaussian to 2.0" seeing before stacking; BOTTOM ROW - a STARLINK median clipped stack where image has only been smoothed ''after'' stacking to 2.0" with a Gaussian; the STARLINK median stack with no smoothing at all (seeing about 1.35"). All images are shown with the same intensity scale.
+To test the problems with the stack, Peter Draper and I have repeated the stacking of MD08 r-band skycell 041 using STARLINK software. This stack has 25 input warps - unfortunately for some unknown reason two were missing from Durham's data bundle, so we have only been able to stack 23. Shown below are crops from: TOP ROW - '''left''': the original IPP stack (seeing 2.0" FWHM); '''right:''' a STARLINK median clipped stack where the warps have been smoothed with a Gaussian to 2.0" seeing before stacking; BOTTOM ROW - '''left:''' a STARLINK median clipped stack where image has only been smoothed ''after'' stacking to 2.0" with a Gaussian; '''right:''' the STARLINK median stack with no smoothing at all (seeing about 1.35"). All images are shown with the same intensity scale.
 
 [[Image(original.jpg, 400px)]] [[Image(smooth_before.jpg, 400px)]] 
@@ -134 +134 @@
 [[Image(smooth_after.jpg, 400px)]] [[Image(unsmoothed.jpg, 400px)]]
 
+Note that we have NOT used the masks or the weights when combining these images using STARLINK.