Changes between Version 641 and Version 642 of MD.GR0

Timestamp:

Feb 6, 2013, 6:54:05 PM (13 years ago)

Author:

Mark Huber

Comment:

--

MD.GR0

@@ -1805 +1805 @@
  * data_group: MD09.deeptest.20120727
 
-Different cuts were made 
-
+Some pre-input cuts were made in an attempt to clean out less useful exposures, focus is still on stack issues not how to deal with the worst of the input images --
+{{{
+filter: FWHM_MAJOR, elongation, zeropoint, background limits for the entire exposure from the camera stage stats
+g: 8.5, 1.3, 24.0, 500
+r: 8.5, 1.3, 24.0, 800
+i: 8.5, 1.4, 24.0, 2000
+z: 8.5, 1.4, 24.0, 4000
+y: 8.5, 1.3, 23.0, 5000
+}}}
+ 
+ * the revised DEEP_STACK reduction configuration then imposes an addition FWHM cut based on the FWHM of the input warp skycells (can be wildly different from the equivalent camera exposure FWHM) of FWHM_mean+1.5*SIGMA
 
 
 || [[Image(MD09.GR0.20120601-MD09.deeptest.20120727.s055-MD09.refstack.20120831.s055.i.expfwhm.png,300px)]]  || [[Image(md09deep_inputtargetfwhm_i.log_fwhmhistomap.png,300px)]] ||
  * (left) Sample histogram of the available exposures by camera FWHM_MAJOR in i-band (red) and selected to attempt a deepstack with (blue) in top row, refstack in bottom row.
- * (right) Sample histograms for each skycell over the FPA by FWHM of the input warps in the i-band (blue) and rejected for poor PSF (red). The black dotted line is the input cut @7.5 pixels and the red line is the FWHM_mean+1.5*FWHM_SIGMA additional cut on the input FWHM that is often ~6 pixels given the available input warps -- initially set in an attempt to restrict the target PSF of the convolved version of the stack to ~1.5" but other problem(s) still exist that drive the target PSF much larger.
+ * (right) Sample histograms for each skycell over the FPA by FWHM of the input warps in the i-band (blue) and rejected for poor PSF or other issues (red). The black dotted line is the input cut @7.5 pixels and the red line is the FWHM_mean+1.5*FWHM_SIGMA additional cut on the input FWHM that is often ~6 pixels given the available input warps -- initially set in an attempt to restrict the target PSF of the convolved version of the stack to ~1.5" but other problem(s) still exist that drive the target PSF much larger (not shown).
 
 Stack photometry plots from the Durham 2012 meeting had many faults from bugs in the code, the plots have been updated and include comparison to the ubercal reference catalog