Index: trunk/ippconfig/gpc1/psastro.config
===================================================================
--- trunk/ippconfig/gpc1/psastro.config	(revision 37555)
+++ trunk/ippconfig/gpc1/psastro.config	(revision 37556)
@@ -422,9 +422,11 @@
    ## refcat may be okay astrom but not phot -- so need to be able to further limit by ZP 
    ## -- concern w/ new refcat >20 extra sources w/ larger merr over-dominating scatter in ZP 
+   ## -- CLAMP will limit both astrom and zp -- 
    REFSTAR_CLAMP_MAG_MAX       F32   20.0
    REFSTAR.ZP.MIN.MAG          F32   12.0
-   REFSTAR.ZP.MAX.MAG          F32   21.0
+   REFSTAR.ZP.MAX.MAG          F32   20.0
    ## for ZP need extra clamp by filter to avoid poorer photometry scatter on faint end
    ## -- cannot restrict on bright end due to possible marginal nights
+   ## -- set for merr<0.02-0.03 in refcat, ~similar for each MD field
 #   PHOTCODE.DATA MULTI UPDATE
    PHOTCODE.DATA MULTI   
@@ -432,25 +434,25 @@
      FILTER   STR g
      PHOTCODE STR g
-     REFSTAR.ZP.MAX.MAG    F32  20.0
+     REFSTAR.ZP.MAX.MAG    F32  19.0
    END
    PHOTCODE.DATA METADATA
      FILTER   STR r
      PHOTCODE STR r
-     REFSTAR.ZP.MAX.MAG    F32  20.0
+     REFSTAR.ZP.MAX.MAG    F32  19.0
    END
    PHOTCODE.DATA METADATA
      FILTER   STR i
      PHOTCODE STR i
-     REFSTAR.ZP.MAX.MAG    F32  20.0
+     REFSTAR.ZP.MAX.MAG    F32  18.5
    END
    PHOTCODE.DATA METADATA
      FILTER   STR z
      PHOTCODE STR z
-     REFSTAR.ZP.MAX.MAG    F32  19.5
+     REFSTAR.ZP.MAX.MAG    F32  18.5
    END
    PHOTCODE.DATA METADATA
      FILTER   STR y
      PHOTCODE STR y
-     REFSTAR.ZP.MAX.MAG    F32  18.0
+     REFSTAR.ZP.MAX.MAG    F32  17.5
    END
 END
@@ -621,5 +623,6 @@
    REFSTAR.ZP.MIN.MAG      F32  15.0  # general refcat zp min/max setting -- need to use photcode below
    REFSTAR.ZP.MAX.MAG      F32  19.0
-
+   ## set min to avoid bright turnover and max to limit merr<0.04
+   ## -- 
 #   PHOTCODE.DATA MULTI UPDATE
    PHOTCODE.DATA MULTI