Initial/ongoing comparison of IPP to SuperMACHO/ESSENCE Photpipe reductions using GPC1 images from the 2009.01 release.

(don't forget to note the IPP svn-head revision # being used if different a default, say 23243?)

=== Basic Data Locations ===

* Odyessy:
{{{
/n/data1/panstarrs/GPC1/MD01_20081002_1/
/n/data1/panstarrs/GPC1/MD01_20081002_1/workspace
}}}

* groucho: 
{{{
http://groucho.pha.jhu.edu/PS/smsn_workspace
http://groucho.pha.jhu.edu/PS/ippsvn/
}}}


=== Test chip/skycell Sample ===
(because they are already made)

* skycell.02877.31 - focus on XY33 (~50% of field, center of camera and tent region)
{{{
 RA,Dec center = 02:23:37.250 -04:20:03.53 J2000  35.90521  -4.33431
 X,Y center (size) = 2754, 2003 (5508,4006)
 platescale = 0.2
}}}

odyssey:/n/data1/panstarrs/GPC1/MD01_20081002_1/36475/chip/o4741g0234o.36475.ch.11948.XY33.ch.fits

* skycell.02879.00 -  focus on XY22 (~90% of field, in better focus region around center)
{{{
 RA,Dec center = 02:24:32.502 -05:00:06.29 J2000  36.09376  -5.00175
 X,Y center (size) = 2754, 2003 (5508,4006)
 platescale = 0.2
}}}

odyssey:/n/data1/panstarrs/GPC1/MD01_20081002_1/36475/chip/o4741g0234o.36475.ch.11948.XY22.ch.fits

=== Warping (PSwarp and SWarp) ===

* sanity check - swarp and pswarp same chip to same skycell 

* pswarps - uncompressed, single FITS files - see README
/n/data1/panstarrs/GPC1/MD01_20081002_1/workspace/su_warp/suo4741g0234o.36475.wrp.11948.all.skycell.02877.31.fits


=== Differencing (ppSub and hotpants) ===

* ppSub(pswarp-pswarp, pswarp-swarp:stack, pswarp-ppStack)

* hotpants(pswarp-pswarp, pswarp-ppStack, swarp-ppStack, pswarp-swarp:stack) 


=== Stacking (ppStack and SWarp) ===

* ppStack(pswarps, swarps)
/n/data1/panstarrs/GPC1/MD01_20081002_1/workspace/meh_ppstack

* swarp(swarps, pswarps)

* initial stack test --
{{{
 imstats 36475-36478.fits -box 4948 2331 80 80
 STATS: bkg:-0.985735 sigma_bkg:12.967378 Nused:6382 Nclipped:18 lowest_val:-52.730080 highest_val:55.483871

 imstats suo4741g0234o.36475.wrp.11948.all.skycell.02877.31.fits -box 4948 2331 80 80
 STATS: bkg:1.608557 sigma_bkg:24.464390 Nused:6382 Nclipped:18 lowest_val:-85.380753 highest_val:88.475899

 imstats skycell.02879.31.stk4a.fits -box 4948 2331 80 80
 STATS: bkg:-0.324937 sigma_bkg:2.308740 Nused:6225 Nclipped:175 lowest_val:-5.852595 highest_val:10.131362

 imstats skycell.02879.31.stk4b.fits -box 4948 2331 80 80
 STATS: bkg:-7.943039 sigma_bkg:6.104924 Nused:6304 Nclipped:6 lowest_val:-25.602289 highest_val:12.588408

 imstats skycell.02879.31.stk8.fits -box 4948 2331 80 80
 STATS: bkg:-2.741246 sigma_bkg:5.151842 Nused:6216 Nclipped:184 lowest_val:-17.833969 highest_val:21.132132

 imstats skycell.02879.31.stk8.fits -box 2650 2180 80 80
 STATS: bkg:0.223009 sigma_bkg:5.304905 Nused:6396 Nclipped:4 lowest_val:-14.943192 highest_val:17.027874

 imstats suo4741g0234o.36475.wrp.11948.all.skycell.02877.31.fits -box 2650 2180 80 80
 STATS: bkg:4.214430 sigma_bkg:28.889675 Nused:3614 Nclipped:149 lowest_val:-4511.794922 highest_val:4742.093750
}}}


=== Photometry (psphot and dophot/pixie) ===



=== to be sorted ===