Index: trunk/psphot/src/psphotExtendedSourceFits.c
===================================================================
--- trunk/psphot/src/psphotExtendedSourceFits.c	(revision 25755)
+++ trunk/psphot/src/psphotExtendedSourceFits.c	(revision 26894)
@@ -1,6 +1,34 @@
 # include "psphotInternal.h"
 
+// for now, let's store the detections on the readout->analysis for each readout
+bool psphotExtendedSourceFits (pmConfig *config, const pmFPAview *view)
+{
+    bool status = true;
+
+    // select the appropriate recipe information
+    psMetadata *recipe  = psMetadataLookupPtr (&status, config->recipes, PSPHOT_RECIPE);
+    psAssert (recipe, "missing recipe?");
+
+    // perform full extended source non-linear fits?
+    if (!psMetadataLookupBool (&status, recipe, "EXTENDED_SOURCE_FITS")) {
+        psLogMsg ("psphot", PS_LOG_INFO, "skipping extended source measurements\n");
+        return true;
+    }
+
+    int num = psMetadataLookupS32 (&status, config->arguments, "PSPHOT.INPUT.NUM");
+    psAssert (status, "programming error: must define PSPHOT.INPUT.NUM");
+
+    // loop over the available readouts
+    for (int i = 0; i < num; i++) {
+	if (!psphotExtendedSourceFitsReadout (config, view, "PSPHOT.INPUT", i, recipe)) {
+            psError (PSPHOT_ERR_CONFIG, false, "failed on to fit extended sources for PSPHOT.INPUT entry %d", i);
+	    return false;
+	}
+    }
+    return true;
+}
+
 // non-linear model fitting for extended sources
-bool psphotExtendedSourceFits (pmReadout *readout, psArray *sources, psMetadata *recipe) {
+bool psphotExtendedSourceFitsReadout (pmConfig *config, const pmFPAview *view, const char *filename, int index, psMetadata *recipe) {
 
     bool status;
@@ -12,4 +40,22 @@
     bool savePics = false;
 
+    // find the currently selected readout
+    pmFPAfile *file = pmFPAfileSelectSingle(config->files, filename, index); // File of interest
+    psAssert (file, "missing file?");
+
+    pmReadout *readout = pmFPAviewThisReadout(view, file->fpa);
+    psAssert (readout, "missing readout?");
+
+    pmDetections *detections = psMetadataLookupPtr (&status, readout->analysis, "PSPHOT.DETECTIONS");
+    psAssert (detections, "missing detections?");
+
+    psArray *sources = detections->allSources;
+    psAssert (sources, "missing sources?");
+
+    if (!sources->n) {
+	psLogMsg ("psphot", PS_LOG_INFO, "no sources, skipping source size");
+	return true;
+    }
+
     // user-defined masks to test for good/bad pixels (build from recipe list if not yet set)
     psImageMaskType maskVal = psMetadataLookupImageMask(&status, recipe, "MASK.PSPHOT"); // Mask value for bad pixels
@@ -21,10 +67,4 @@
     // maskVal is used to test for rejected pixels, and must include markVal
     maskVal |= markVal;
-
-    // perform full extended source non-linear fits?
-    if (!psMetadataLookupBool (&status, recipe, "EXTENDED_SOURCE_FITS")) {
-        psLogMsg ("psphot", PS_LOG_INFO, "skipping extended source measurements\n");
-        return true;
-    }
 
     // select the collection of desired models