Summary of MD02.refstack.20120827

Similar to the MD02.GR0 (MD.GR0) refstacks for the 2011/2012 season, these include recent improvement and input cuts to help constrain the convolved stacks as well.

MD02 observations started Sept. 27 (ended last season started mid-Sept. and ended of February).

Filter	N total	N (FWHM<8 pixels)
g	331	260
r	327	281
i	427	386
z	509	483
y	386	340

MD02.V3 reference stack

Reference stack using data from 2010+2011, a balance of N input warps versus best seeing, excluding exposures with large background, low zeropoints, and large elongation.

• label: MD02.refstack.20120927
• data_group: MD02.refstack.20120927

Test stack (reftest) sample also made again for skycell.055 with different number of input warps.

• label: MD02.reftest.20120927
• data_group:
  • MD02.reftest.20120927.c#f<FWHM cut> where #=comparison run, <FWHM cut>=cut <fwhm_major from camProcessedExp
  • MD02.reftest.20120927.all.<FWHM cut> where all means 2009+2010+2011 data possible, <FWHM cut>=cut <fwhm_major from camProcessedExp
  • MD02.reftest.20120927.2011.<FWHM cut> where 2011 means 2011 data only, <FWHM cut>=cut <fwhm_major from camProcessedExp

	Histograms of the FWHM major and minor from camera stage for reprocessed all exposures (red) and refstack.20120927 (top blue) and refstack.2011 (bottom blue).

Summary comparison table with the approximate FWHM (major) as the PSF FWHM from a center field skycell (V3=055) after running psphot on the stacks. Because the reftests were all run on the same date, the stack_id is important to note to separate by filter as well.

version data_group (stack_id)	filter	center skycell input warps (rej)	center skycell FWHM (major)
new MD02.refstack.20120927 V3	g	()	"
MD02.reftest.20120927.c1f V3 ()	g	()	"
old MD02.refstack.2011 V3	g	()	"
new MD02.refstack.20120927 V3	r	()	"
MD02.reftest.20120927.c1f V3 ()	r	()	"
old MD02.refstack.2011 V3	r	()	"
new MD02.refstack.20120927 V3	i	()	"
MD02.reftest.20120927.c1f V3 ()	i	()	"
old MD02.refstack.2011 V3	i	()	"
new MD02.refstack.20120927 V3	z	()	"
MD02.reftest.20120927.c1f V3 ()	z	()	"
old MD02.refstack.2011 V3	z	()	"
new MD02.refstack.20120927 V3	y	()	"
MD02.reftest.20120927.c1f V3 ()	y	()	"
old MD02.refstack.2011 V3	y	()	"

Test psphot run on refstack

Troubled skycells

Reftest Results

Refstack Comparisons