Index: trunk/ippconfig/gpc1/ppImage.config
===================================================================
--- trunk/ippconfig/gpc1/ppImage.config	(revision 35530)
+++ trunk/ippconfig/gpc1/ppImage.config	(revision 35531)
@@ -30,4 +30,7 @@
 USE.VIDEO.MASK  BOOL    TRUE            # Use a video mask if we have video data?
 
+# aditional auxillary mask applied to corners of all chips in video cells.
+# Is only applied if MASK.AUXMASK and USE.VIDEO.MASK are both true
+AUX.VIDEO.MASK  STR     neb://any/gpc1/auxmask/mpg.20130506/mask_video_cell_corners.fits
 
 
@@ -150,5 +153,5 @@
 FRINGE.FILTERS	STR y.00000
 
-# Standard chip processing
+# Standard chip processing (NOTE: when changing this be sure to check whether changes should be applied toCHIP_BGPRESEVE and/or CHIP_AUXMASK
 CHIP METADATA
   BASE.FITS          BOOL    FALSE           # Save base detrended image?
@@ -169,4 +172,5 @@
   MASK.BUILD	     BOOL    TRUE	     # Build internal mask?
   MASK.BURNTOOL      BOOL    TRUE            # Mask potential burntool trails
+  MASK.AUXMASK       BOOL    FALSE           # augment with more restrictive auxillary mask
   PATTERN.ROW        BOOL    TRUE            # Row pattern correction
   PATTERN.CELL	     BOOL    FALSE	     # Cell pattern correction
@@ -1220,4 +1224,37 @@
 END
 
+# Standard chip processing + auxillary mask
+CHIP_AUXMASK METADATA
+  BASE.FITS          BOOL    FALSE           # Save base detrended image?
+  BASE.MASK.FITS     BOOL    FALSE           # Save base detrended image?
+  BASE.VARIANCE.FITS BOOL    FALSE           # Save base detrended image?
+  CHIP.FITS          BOOL    TRUE            # Save chip-mosaic-ed image? 
+  CHIP.MASK.FITS     BOOL    TRUE            # Save chip-mosaic-ed image? 
+  CHIP.VARIANCE.FITS BOOL    TRUE            # Save chip-mosaic-ed image? 
+  OVERSCAN           BOOL    TRUE            # Overscan subtraction
+  NONLIN             BOOL    TRUE            # apply non-linearity correction 
+  BIAS               BOOL    FALSE           # Bias subtraction
+  DARK               BOOL    TRUE            # Dark subtraction
+  NOISEMAP	     BOOL    TRUE	     
+  REMNANCE           BOOL    FALSE           # Remnance masking
+  SHUTTER            BOOL    FALSE           # Shutter correction
+  FLAT               BOOL    TRUE            # Flat-field normalisation
+  MASK               BOOL    TRUE            # Mask bad pixels
+  MASK.BUILD	     BOOL    TRUE	     # Build internal mask?
+  MASK.BURNTOOL      BOOL    TRUE            # Mask potential burntool trails
+  MASK.AUXMASK       BOOL    TRUE            # augment with more restrictive auxillary mask
+  PATTERN.ROW        BOOL    TRUE            # Row pattern correction
+  PATTERN.CELL	     BOOL    FALSE	     # Cell pattern correction
+  PATTERN.CONTINUITY BOOL    TRUE            # Cell pattern correction using edge continuity
+  FRINGE             BOOL    TRUE            # Fringe subtraction
+  BIN1.FITS          BOOL    TRUE            # Save 1st binned chip image?
+  BIN2.FITS          BOOL    TRUE            # Save 2nd binned chip image?
+  PHOTOM             BOOL    TRUE            # Source identification and photometry
+  ASTROM.CHIP        BOOL    FALSE           # Astrometry per chip?
+  ASTROM.MOSAIC      BOOL    FALSE           # Astrometry for mosaic?
+  BACKGROUND         BOOL    TRUE            # Subtract background?
+  CROSSTALK.MEASURE  BOOL    TRUE            # Subtract model background?
+END
+
 # Standard chip processing without any background removal
 CHIP_PRESERVE_BG	METADATA
@@ -1239,4 +1276,5 @@
   MASK.BUILD	     BOOL    TRUE	     # Build internal mask?
   MASK.BURNTOOL      BOOL    TRUE            # Mask potential burntool trails
+  MASK.AUXMASK       BOOL    TRUE            # augment with more restrictive auxillary mask
   PATTERN.ROW        BOOL    FALSE           # Row pattern correction
   PATTERN.CELL	     BOOL    FALSE	     # Cell pattern correction
Index: trunk/ippconfig/recipes/ppImage.config
===================================================================
--- trunk/ippconfig/recipes/ppImage.config	(revision 35530)
+++ trunk/ippconfig/recipes/ppImage.config	(revision 35531)
@@ -17,4 +17,6 @@
 MASK.LOW           BOOL    TRUE            # Mask pixels below valid range
 MASK.BURNTOOL      BOOL    FALSE           # Mask potential burntool trails
+MASK.AUXMASK       BOOL    FALSE           # augment mask with auxillary mask
+AUX.VIDEO.MASK     STR     NULL
 VARIANCE.BUILD     BOOL    FALSE           # Build internal variance image
 ADDNOISE           BOOL    FALSE           # Add noise to degrade an MD image to a 3pi image?
@@ -168,4 +170,29 @@
 # Standard chip processing
 CHIP	METADATA
+  BASE.FITS          BOOL    FALSE           # Save base detrended image?
+  BASE.MASK.FITS     BOOL    FALSE           # Save base detrended image?
+  BASE.VARIANCE.FITS BOOL    FALSE           # Save base detrended image?
+  CHIP.FITS          BOOL    TRUE            # Save chip-mosaic-ed image? 
+  CHIP.MASK.FITS     BOOL    TRUE            # Save chip-mosaic-ed image? 
+  CHIP.VARIANCE.FITS BOOL    TRUE            # Save chip-mosaic-ed image? 
+  OVERSCAN           BOOL    TRUE            # Overscan subtraction
+  NONLIN             BOOL    FALSE           # Non-linearity correction; not implemented
+  BIAS               BOOL    TRUE            # Bias subtraction
+  DARK               BOOL    TRUE            # Dark subtraction
+  SHUTTER            BOOL    FALSE           # Shutter correction
+  FLAT               BOOL    TRUE            # Flat-field normalisation
+  MASK               BOOL    TRUE            # Mask bad pixels
+  FRINGE             BOOL    TRUE            # Fringe subtraction
+  BIN1.FITS          BOOL    TRUE            # Save 1st binned chip image?
+  BIN2.FITS          BOOL    TRUE            # Save 2nd binned chip image?
+  PHOTOM             BOOL    TRUE            # Source identification and photometry
+  ASTROM.CHIP        BOOL    FALSE           # Astrometry per chip?
+  ASTROM.MOSAIC      BOOL    FALSE           # Astrometry for mosaic?
+  BACKGROUND         BOOL    TRUE            # Subtract background?
+  MASK.STATS         BOOL    TRUE            # Calculate Mask statistics.
+END
+
+# Standard chip processing
+CHIP_AUXMASK	METADATA
   BASE.FITS          BOOL    FALSE           # Save base detrended image?
   BASE.MASK.FITS     BOOL    FALSE           # Save base detrended image?
Index: trunk/ippconfig/recipes/reductionClasses.mdc
===================================================================
--- trunk/ippconfig/recipes/reductionClasses.mdc	(revision 35530)
+++ trunk/ippconfig/recipes/reductionClasses.mdc	(revision 35531)
@@ -1007,5 +1007,5 @@
 
 STS_DATASET METADATA
-   CHIP_PPIMAGE STR CHIP
+   CHIP_PPIMAGE STR CHIP_AUXMASK
    CHIP_PSPHOT STR CHIP
    WARP_PSWARP STR WARP
@@ -1023,4 +1023,28 @@
 END
 
+M31_DATASET		METADATA
+	CHIP_PPIMAGE	  STR	  CHIP_AUXMASK
+	CHIP_PSPHOT	  STR	  CHIP
+	WARP_PSWARP	  STR	  WARP
+	STACK_PPSTACK	  STR	  STACK
+	STACK_PPSUB	  STR	  STACK
+	STACK_PSPHOT	  STR	  STACK
+	DIFF_PPSUB	  STR	  DIFF
+	DIFF_PSPHOT	  STR	  DIFF
+	JPEG_BIN1	  STR	  PPIMAGE_J1
+	JPEG_BIN2	  STR	  PPIMAGE_J2
+	FAKEPHOT	  STR	  FAKEPHOT
+	ADDSTAR		  STR	  ADDSTAR
+	PSASTRO		  STR	  DEFAULT_RECIPE
+	STACKPHOT_PSPHOT  STR     STACKPHOT
+	STACKPHOT_PPSUB   STR     STACKPHOT
+	STACKPHOT_PPSTACK STR     STACKPHOT
+	STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+	BACKGROUND_PPBACKGROUND	STR	BACKGROUND
+	BACKGROUND_PSWARP	STR	BACKGROUND
+        PSVIDEOPHOT             STR     PSVIDEOPHOT
+        STATICSKY_CALIBRATION   STR     STATICSKY_CAL
+END
+
 CNP_DATASET	METADATA
 	CHIP_PPIMAGE	  STR	  CHIP
Index: trunk/ppImage/src/Makefile.am
===================================================================
--- trunk/ppImage/src/Makefile.am	(revision 35530)
+++ trunk/ppImage/src/Makefile.am	(revision 35531)
@@ -65,5 +65,6 @@
 	ppImageMemory.c \
         ppImageAddNoise.c \
-        ppImageRandomGaussian.c
+        ppImageRandomGaussian.c \
+	ppImageAuxiliaryMask.c
 
 CLEANFILES = *~
Index: trunk/ppImage/src/ppImage.h
===================================================================
--- trunk/ppImage/src/ppImage.h	(revision 35530)
+++ trunk/ppImage/src/ppImage.h	(revision 35531)
@@ -30,4 +30,5 @@
     bool doMaskLow;                     // mask low pixels
     bool doMask;                        // Mask bad pixels
+    bool doAuxMask;                     // apply auxillary mask
     bool doNonLin;                      // Non-linearity correction
     bool doOverscan;                    // Overscan subtraction
@@ -126,4 +127,6 @@
   psU16 maskstat_magic;
   psU16 maskstat_advisory;
+
+  psString auxVideoMask;                // auxillary video mask file
   
 } ppImageOptions;
@@ -312,4 +315,5 @@
 void ppImageRandomGaussianFree(void);
 
+bool ppImageAuxiliaryMask(pmConfig *config, const pmFPAview *view, const ppImageOptions *options);
 
 #endif
Index: trunk/ppImage/src/ppImageAuxiliaryMask.c
===================================================================
--- trunk/ppImage/src/ppImageAuxiliaryMask.c	(revision 35530)
+++ trunk/ppImage/src/ppImageAuxiliaryMask.c	(revision 35531)
@@ -40,4 +40,16 @@
 }
 
+bool recordFileInHeader(pmChip *chip, psString tag, psString desc, psString filename)
+{
+    pmHDU *hdu = pmHDUGetHighest(chip->parent, chip, NULL);
+
+    // strip off the directories and nebulous bits
+    char *base = filename;
+    for (char *new = base; (new = strpbrk(base, "/:")); base = new + 1);
+
+    psMetadataAddStr(hdu->header, PS_LIST_TAIL, tag, PS_META_DUPLICATE_OK, desc, base);
+    return true;
+}
+
 // In this function, we augment the mask with the more conservative auxiliary mask
 bool ppImageAuxiliaryMask(pmConfig *config, const pmFPAview *view, const ppImageOptions *options)
@@ -51,5 +63,6 @@
     }
 
-    bool status;                        // Status of MD lookup
+    bool status;
+    // Our target chip
     pmFPAfile *input = psMetadataLookupPtr(&status, config->files, "PPIMAGE.CHIP"); // File to correct
     if (!status) {
@@ -58,4 +71,6 @@
     }
 
+    // Find a suitable detRun with type AUXMASK
+
     psTime *time = psMetadataLookupPtr(NULL, input->fpa->concepts, "FPA.TIME");
     if (time->sec == 0 && time->nsec == 0) {
@@ -63,5 +78,4 @@
     }
 
-    // XXX careful about this: is this set correctly in the camera.config files?
     char *cameraName = psMetadataLookupStr(NULL, input->fpa->concepts, "FPA.CAMERA");
     pmDetrendSelectOptions *detrendOptions = pmDetrendSelectOptionsAlloc(cameraName, *time, PM_DETREND_TYPE_AUXMASK);
@@ -80,18 +94,6 @@
     }
     
-#ifdef notdef
-    psMetadata *ppImageRecipe = psMetadataLookupPtr(NULL, config->recipes, RECIPE_NAME);
-    psAssert(ppImageRecipe, "Need PPIMAGE recipe");
-    psMetadata *psphotRecipe = psMetadataLookupPtr(NULL, config->recipes, PSPHOT_RECIPE);
-    psAssert(psphotRecipe, "Need PSPHOT recipe");
-
-    // XXX Should this be options->maskValue or options->maskValue & ~options->satMask?
-    //     The latter will leave saturated pixels high
-    psImageMaskType maskVal = options->maskValue;
-
-    // user-defined masks to test for good/bad pixels (build from recipe list if not yet set)
-    psMetadataAddImageMask(psphotRecipe, PS_LIST_TAIL, "MASK.PSPHOT", PS_META_REPLACE, "user-defined mask", maskVal);
-#endif
-
+    // Go find the readout
+    // code to find the readouts was adapted from ppImageSubtractBackground
     // XXX: shouldn't most of these psWarnings be psAsserts?
 
@@ -129,5 +131,5 @@
     psImage *mask = ro->mask;
 
-    // now read the mask file
+    // now read the auxiliary mask file
     psString class_id = psMetadataLookupStr(NULL, chip->concepts, "CHIP.NAME");
 
@@ -139,9 +141,13 @@
 
     psFree(results);
+    // record that we read this file in the config dump file.
+    // Note: this value isn't used during updates though.
+    pmConfigRunFilenameAddRead(config, "PPIMAGE.AUXMASK", auxMaskFileName);
+    recordFileInHeader(chip, "DETREND.AUXMASK", "auxiliary mask", auxMaskFileName);
 
     psImage *auxMask = readAuxiliaryMask(config, auxMaskFileName);
     psFree(auxMaskFileName);
     if (!auxMask) {
-        // readAuxiliaryMask prints enough diagnostic information
+        psError(PS_ERR_UNKNOWN, false, "failed to read auxiliary mask file");
         return false;
     }
@@ -151,7 +157,11 @@
         psImage *videoMask = readAuxiliaryMask(config, options->auxVideoMask);
         if (!videoMask) {
+            psError(PS_ERR_UNKNOWN, false, "failed to read auxiliary video mask file");
             return false;
         }
-        // auxMask *= videoMask
+        pmConfigRunFilenameAddRead(config, "PPIMAGE.AUXVIDEOMASK", options->auxVideoMask);
+        recordFileInHeader(chip, "DETREND.AUXVIDEOMASK", "auxiliary video mask", options->auxVideoMask);
+
+        // compute auxMask *= videoMask
         if (!psBinaryOp(auxMask, auxMask, "*", videoMask)) {
             psError(PS_ERR_UNKNOWN, false, "mulitplication of auxiliary mask and auxiliary video mask failed");
Index: trunk/ppImage/src/ppImageDetrendReadout.c
===================================================================
--- trunk/ppImage/src/ppImageDetrendReadout.c	(revision 35530)
+++ trunk/ppImage/src/ppImageDetrendReadout.c	(revision 35531)
@@ -50,5 +50,5 @@
 	char *Vptr = strchr(psMetadataLookupStr(NULL,input->parent->parent->hdu->header,"CELLMODE"),'V');
 	if (Vptr) {
-	  hasVideo = true;
+	  hasVideo = options->hasVideo = true;
 	  psLogMsg ("ppImage.detrend", PS_LOG_INFO, "VIDEO: %d %d %d\n",(int) options->hasVideo,(int) options->useVideoDark, (int) options->useVideoMask);
 	}
Index: trunk/ppImage/src/ppImageLoop.c
===================================================================
--- trunk/ppImage/src/ppImageLoop.c	(revision 35530)
+++ trunk/ppImage/src/ppImageLoop.c	(revision 35531)
@@ -188,4 +188,9 @@
             ESCAPE("Unable to mosaic chip");
         }
+
+        if (!ppImageAuxiliaryMask(config, view, options)) {
+            ESCAPE("Unable to apply auxiliary mask");
+        }
+
         timeDetrend += psTimerClear(TIMER_DETREND);
 
Index: trunk/ppImage/src/ppImageOptions.c
===================================================================
--- trunk/ppImage/src/ppImageOptions.c	(revision 35530)
+++ trunk/ppImage/src/ppImageOptions.c	(revision 35531)
@@ -10,4 +10,5 @@
     // psFree(options->nonLinearData);
     // psFree(options->nonLinearSource);
+    psFree(options->auxVideoMask);
 }
 
@@ -24,4 +25,5 @@
     options->doVarianceBuild = false;   // Build internal variance
     options->doMask          = false;   // Mask bad pixels
+    options->doAuxMask       = false;   // apply auxillary mask
     options->doNonLin        = false;   // Non-linearity correction
     options->doOverscan      = false;   // Overscan subtraction
@@ -116,4 +118,6 @@
     options->normClass       = NULL;    // per-class normalizations refer to this class
 
+    options->auxVideoMask    = NULL;    // auxillary video mask file name
+
     return options;
 }
@@ -228,4 +232,14 @@
     options->doMaskBurntool  = psMetadataLookupBool(NULL, recipe, "MASK.BURNTOOL");
     options->doVarianceBuild = psMetadataLookupBool(NULL, recipe, "VARIANCE.BUILD");
+    options->doAuxMask       = psMetadataLookupBool(NULL, recipe, "MASK.AUXMASK");
+    if (options->doAuxMask) {
+        // if we are applying an auxiliary mask we can optionally apply another
+        // mask to video cells only. 
+        psString auxVideoMask = psMetadataLookupStr(NULL, recipe, "AUX.VIDEO.MASK");
+        // save the value if defined and not the value "NULL"
+        if (auxVideoMask && strcmp(auxVideoMask, "NULL")) {
+            options->auxVideoMask = psStringCopy(auxVideoMask);
+        }
+    }
 
     // Mask recipe options (note that mask bit values are set in ppImageSetMaskBits.c)
Index: trunk/psModules/src/detrend/pmDetrendDB.c
===================================================================
--- trunk/psModules/src/detrend/pmDetrendDB.c	(revision 35530)
+++ trunk/psModules/src/detrend/pmDetrendDB.c	(revision 35531)
@@ -110,4 +110,5 @@
 	DETREND_STRING_CASE(VIDEODARK);
 	DETREND_STRING_CASE(LINEARITY);
+	DETREND_STRING_CASE(AUXMASK);
     default:
         return NULL;
Index: trunk/psModules/src/detrend/pmDetrendDB.h
===================================================================
--- trunk/psModules/src/detrend/pmDetrendDB.h	(revision 35530)
+++ trunk/psModules/src/detrend/pmDetrendDB.h	(revision 35531)
@@ -39,4 +39,5 @@
     PM_DETREND_TYPE_VIDEODARK,
     PM_DETREND_TYPE_LINEARITY,
+    PM_DETREND_TYPE_AUXMASK,
 } pmDetrendType;
 
