= Summary of MD02.refstack.20120827 =
[[PageOutline]]

Similar to the MD02.GR0 ([wiki:MD.GR0#MD02.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


|| [[Image(MD02.g.00000.expfwhm.png,300px)]] || [[Image(MD02.r.00000.expfwhm.png,300px)]] ||
|| [[Image(MD02.i.00000.expfwhm.png,300px)]] || [[Image(MD02.z.00000.expfwhm.png,300px)]] ||
|| [[Image(MD02.y.00000.expfwhm.png,300px)]] || 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

|| [[Image(MD01.20120803_g_test.png,300px)]] || [[Image(MD01.20120803_i_test.png,300px)]] ||


Troubled skycells 

|| [[Image(MD02.refstack.2011.NULL.i.00000.stksummap.png,300px)]] || [[Image(MD02.refstack.20120927.NULL.g.00000.stksummap.png,300px)]] ||  [[Image(MD02.GR0.20120803.nightstack.20090629.NULL.g.00000.stksummap.png,300px)]] || 


== Reftest Results ==

== Refstack Comparisons ==