= GPC1 Reference Catalog =

== Reductions ==

|| Reduction || Date || Reference Catalog || Static Sky Photometry || Notes ||
|| SAS2.123.rerun20111129 || 2011-11-30 || Synth || Single-Filter, PSF-stats only || Consistent re-reduction with synthetic catalog.||
|| czw.SASg.bkg || 2011-12-13 || Synth || none || Includes improved PATTERN.ROW/PATTERN.CELL choices. Only available in g filter. (not in PSPS) ||
|| czw.SAS.continuity || 2012-02-29 || Synth || 5-band, forced photometry + extended source analysis || Includes continuity correction. ||
|| czw.SAStest || 2012-03-30 || PS1.REF.20120325 || 5-band, etc.  || Includes Noisemap correction. ||
|| SAStest.v4  || 2012-05-10 || PS1.REF.20120505 || 5-band, etc.  || Includes boosted noisemap, improved ghost model, improved reference catalog ||
|| SAStest.v5  || 2012-05-31 || PS1.REF.20120524 || 5-band, etc.  || Includes improved pshot+psphotStack (+ details), improved reference catalog for bright sources and ghost model ||
== Key ==

Each plot shows the histogram of the previous reductions, indexed by the box width and the pattern used to fill the box.  The SAStest (which uses the new reference catalog) is consistently plotted in blue, whereas all previous reductions are plotted in a color representing the filter:
|| Color || Filter ||
|| Green || g.00000||
|| Red   || r.00000||
|| Purple|| i.00000||
|| Black || z.00000||
|| Brown || y.00000||

== Statistics ==

|| Filter  || Reduction              || Zeropoint || Zeropoint Sigma || Sigma RA || 
|| g.00000 || SAS2.123.rerun20111129 || 24.4896 +/- 0.0703976 || 0.0093078 +/- 0.0063013 || 0.157016 +/- 0.00889786 ||
||         || czw.SASg.bkg           || 24.4900 +/- 0.0702534 || 0.0095896 +/- 0.0063863 || 0.156969 +/- 0.00903421 ||
||         || czw.SAS.continuity     || 24.4893 +/- 0.0703734 || 0.0095073 +/- 0.0060756 || 0.156860 +/- 0.008981 ||
||         || czw.SAStest            || 24.4345 +/- 0.0085146 || 0.0360338 +/- 0.0038688 || 0.028311 +/- 0.00397256 ||
|| r.00000 || SAS2.123.rerun20111129 || 24.7800 +/- 0.0819525 || 0.0220368 +/- 0.0735258 || 0.178928 +/- 0.00921915 ||
||         || czw.SAS.continuity     || 24.7795 +/- 0.0798221 || 0.0209898 +/- 0.0586834 || 0.178670 +/- 0.00921215 ||
||         || czw.SAStest            || 24.6659 +/- 0.0064320 || 0.0279179 +/- 0.0033903 || 0.022197 +/- 0.00405199||
|| i.00000 || SAS2.123.rerun20111129 || 24.7372 +/- 0.166531  || 0.0196903 +/- 0.0550734 || 0.182216 +/- 0.00952142 || 
||         || czw.SAS.continuity     || 24.7371 +/- 0.16596   || 0.0182169 +/- 0.0388831 || 0.182158 +/- 0.00952476 ||
||         || czw.SAStest            || 24.5720 +/- 0.0047154 || 0.0278085 +/- 0.0023871 || 0.020658 +/- 0.00409838 ||
|| z.00000 || SAS2.123.rerun20111129 || 24.3912 +/- 0.0719598 || 0.0123021 +/- 0.0341089 || 0.179379 +/- 0.00976284 ||
||         || czw.SAS.continuity     || 24.3914 +/- 0.0717808 || 0.0123326 +/- 0.0332356 || 0.179267 +/- 0.00976036 ||
||         || czw.SAStest            || 24.2326 +/- 0.0062009 || 0.0283726 +/- 0.0041190 || 0.022693 +/- 0.00420167 ||
|| y.00000 || SAS2.123.rerun20111129 || 23.4098 +/- 0.0478044 || 0.0112222 +/- 0.0219299 || 0.175774 +/- 0.0103804 ||
||         || czw.SAS.continuity     || 23.4100 +/- 0.0486761 || 0.0094085 +/- 0.0236608 || 0.175604 +/- 0.0104095 ||
||         || czw.SAStest            || 23.2532 +/- 0.0083929 || 0.0368878 +/- 0.003583  || 0.025637 +/- 0.00405634 ||




== Zeropoints ==
[[Image(zpt.g.2.png,400px)]]
[[Image(zpt.r.2.png,400px)]]
[[Image(zpt.i.2.png,400px)]]
[[Image(zpt.z.2.png,400px)]]
[[Image(zpt.y.2.png,400px)]]

== Zeropoint Sigma ==
[[Image(zptsig.g.png,400px)]]
[[Image(zptsig.r.png,400px)]]
[[Image(zptsig.i.png,400px)]]
[[Image(zptsig.z.png,400px)]]
[[Image(zptsig.y.png,400px)]]

== RA ==
[[Image(sigma_r.g.png,400px)]]
[[Image(sigma_r.r.png,400px)]]
[[Image(sigma_r.i.png,400px)]]
[[Image(sigma_r.z.png,400px)]]
[[Image(sigma_r.y.png,400px)]]

== Dec ==
[[Image(sigma_d.g.png,400px)]]
[[Image(sigma_d.r.png,400px)]]
[[Image(sigma_d.i.png,400px)]]
[[Image(sigma_d.z.png,400px)]]
[[Image(sigma_d.y.png,400px)]]