don't double count PMT pairs in fts cut

1 files changed, 1 insertions, 1 deletions

diff --git a/src/dc.c b/src/dc.c
index 7242617..5ab4431 100644
--- a/src/dc.c
+++ b/src/dc.c
@@ -54,7 +54,7 @@ int is_fts(event *ev)
         /* Only loop over hit PMTs with good calibrations. */
         if (!ev->pmt_hits[i].hit || ev->pmt_hits[i].flags) continue;
 
-        for (j = 0; j < MAX_PMTS; j++) {
+        for (j = i+1; j < MAX_PMTS; j++) {
             /* Only loop over hit PMTs with good calibrations. */
             if (i == j || !ev->pmt_hits[j].hit || ev->pmt_hits[j].flags) continue;