Changes between Initial Version and Version 1 of MD05.refstack.20121202

Timestamp:

Dec 3, 2012, 1:14:42 PM (14 years ago)

Author:

Mark Huber

Comment:

--

MD05.refstack.20121202

@@ +1 @@
+= Summary of MD05.refstack.20121202 =
+[[PageOutline]]
+
+Similar to the MD05.GR0 ([wiki:MD.GR0#MD05.GR0]) refstacks for the 2011/2012 season, these include recent improvement and input cuts to help constrain the convolved stacks as well. Because the refstack is made with reprocessed pixels, the refstack pixels will now have the ubercalibration. Overall fewer inputs to the refstack were done this round and will not be excessively deep as last season.
+
+MD05 observations:
+ * starting end of November 2012  
+ * end of November 2011 through early May 2012 
+ * mid-December 2010 to end of April 2011
+ * end November 2009 to early May 2010
+
+
+|| '''Filter''' || '''N total''' || '''N FWHM<8 pixels''' ||  '''N (FWHM<8 pixels for 2011/2012''' ||
+|| || || || ||
+|| g ||  
+|| r || 
+|| i || 
+|| z || 
+|| y || 
+|| || || || ||
+
+
+Status:
+ * 11/30 
+ * 12/01 selected exposure reprocessing, updates started
+ * 12/02 reftest runs to be setup, evaluated. 
+ * 12/03 setup being overrun by LAP staticsky, the refstacks started but will take >3x longer than normal.. maybe done by end of week
+ * 12/?? refstack runs finished
+
+
+== MD05.V3  Processing (chip->warp + refstack) ==
+
+Exposure reprocessing was done for only a limited number (~150) of the best images from 2010-2011 to provide a balance of N input warps versus best seeing, excluding exposures with large background, low zeropoints and large elongation. 
+
+Processing chip-warp and the refstack itself has the same label, data_group
+ * label: MD04.refstack.20121125 --> ''once set as active refstack for diffims, stack label will change to MD04.refstack'', chip/cam/warp label will remain the same
+ * data_group: MD04.refstack.20121125
+
+New ipp-20121026 tag used but shouldn't be any large changes for refstack processing versus ipp-20120802.
+
+Histograms of the FWHM major and minor and elongation from camera stage value (full exposure) for the sample of reprocessed exposures (red) and used for refstack.20121122 (top blue) and used for refstack.20111012 (bottom blue) in grizy order 
+
+|| [[Image(.g.expfwhm.png,300px)]] || [[Image(.r.expfwhm.png,300px)]] || [[Image(.i.expfwhm.png,300px)]] || 
+|| [[Image(.z.expfwhm.png,300px)]] || [[Image(.y.expfwhm.png,300px)]] ||   ||
+
+
+Test stack (reftest) sample also made again for skycell.055 with different number of input warps. 
+ * label: MD04.reftest.20121125
+ * data_group: 
+  * MD04.reftest.20121125.c#f<FWHM cut> where #=comparison run, <FWHM cut>=cut  <fwhm_major from camProcessedExp x10>
+  * MD04.reftest.20121125.all.<FWHM cut> where all means 2009+2010+2011 data possible, <FWHM cut>=cut <fwhm_major from camProcessedExp x10>
+  * MD04.reftest.20121125.2010.<FWHM cut> where 2010 means 2010+2011 data only, <FWHM cut>=cut <fwhm_major from camProcessedExp x10>
+
+
+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. 
+
+{{{
+| data_group                    | filter  | stack_id | warps_in | warps_rej |  FWHM_MAJ   IQ_FW1 (pixels)
++-------------------------------+---------+----------+----------+-----------+
+--> 2012/2013 refstack
+
+--> reftest comparisons         
+
+
+--> previous 2011/2012 refstack         
+
+
+
+
+}}}
+
+
+
+As before, the FWHM_MAJOR with the central skycell can be variable and more so with largely different input sets. Comparison with the psf_major/minor maps are more useful between refstack versions.
+
+
+== Problems (to be updated) ==
+ * generally edge skycells have issues, need better containment of those still. (see Core coverage below).
+ * some convolved stacks have strange/poor FWHM PSF -- reprocessed using DEEP_STACK config with lighter input restrictions so may not have best FWHM, but 99% on the edge of field so won't anyways. Seems to be fewer problems compared to previous refstacks.
+  * g:
+  * r: 
+  * i: 
+  * z:
+  * y:
+ * bad cell arc in primarily skycell.033,024,025,026,047 y-band from ota14, cell 31. Not really seen in skycell.036 like others. ??
+ * poor/bad cell arc in primarily skycell.064 g-band (and less so in other filters) from ota43, cell 54? see [wiki:MD10.refstack.20120705] where was in skycell.054. ??
+ * misc clusters of ghosts in g-band 
+
+Core coverage is the default set
+82-87
+x1-x8
+12-17
+ * weaker (fewer inputs) for 012,017,021,028,071,078,082,087 in various filters  ??
+ * using 2009 data in y-band and even in other years has provided some additional edge skycells in the refstack to be aware or wary of. Likely won't be covered enough for many diffims.
+  * g: 
+  * r: 
+  * i: 
+  * z: 
+  * y: 
+
+
+== Refstack Summary ==
+Refstacks run through the staticsky (single filter mode so basic psphot with deteff measurements) and skycal stage on the unconvolved stacks to make the map plots (full 5 filter version still having occasional faults to work through):
+ * label: MD04.refstack.20121125, MD04.refstack.20121125
+ * data_group:  MD04.refstack.20121125.1x201211xx, MD04.refstack.2012xxxx.1x201211xx.cal201211xx
+
+
+Source photometry psf_major,_minor maps (grizy):
+
+|| [[Image(md04v2012x1skycal_cmf_g.txt_psfmap.png,300px)]] || [[Image(md04v2012x1skycal_cmf_r.txt_psfmap.png,300px)]] ||  [[Image(md04v2012x1skycal_cmf_i.txt_psfmap.png,300px)]] ||  [[Image(md04v2012x1skycal_cmf_z.txt_psfmap.png,300px)]] ||  [[Image(md04v2012x1skycal_cmf_y.txt_psfmap.png,300px)]] ||   
+
+
+Magnitude of sources@5-sigma maps (grizy):
+
+|| [[Image(md04v2012x1skycal_cmf_g.txt_mag5sigmap.png,300px)]] || [[Image(md04v2012x1skycal_cmf_r.txt_mag5sigmap.png,300px)]] ||  [[Image(md04v2012x1skycal_cmf_i.txt_mag5sigmap.png,300px)]] ||  [[Image(md04v2012x1skycal_cmf_z.txt_mag5sigmap.png,300px)]] ||  [[Image(md04v2012x1skycal_cmf_y.txt_mag5sigmap.png,300px)]] || 
+
+
+Detection efficiency magnitude @50% recovery (500 fakes, grizy):
+
+|| [[Image(md04v2012x1skycal_cmf_g.txt_mag50gridmap.png,300px)]] || [[Image(md04v2012x1skycal_cmf_r.txt_mag50gridmap.png,300px)]] || [[Image(md04v2012x1skycal_cmf_i.txt_mag50gridmap.png,300px)]] || [[Image(md04v2012x1skycal_cmf_z.txt_mag50gridmap.png,300px)]] || [[Image(md04v2012x1skycal_cmf_y.txt_mag50gridmap.png,300px)]] ||