From e35806485af0882bc951b6307ec92264e7e0b0c4 Mon Sep 17 00:00:00 2001
From: Juan Cabanela <cabanela@mnstate.edu>
Date: Thu, 17 Aug 2023 08:34:50 -0500
Subject: [PATCH] Fix issue #157 with setting ccd_data to float before flagging
 with NaN.

---
 stellarphot/photometry/photometry.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/stellarphot/photometry/photometry.py b/stellarphot/photometry/photometry.py
index 46c2e338..eb5b030a 100644
--- a/stellarphot/photometry/photometry.py
+++ b/stellarphot/photometry/photometry.py
@@ -249,7 +249,9 @@ def single_image_photometry(ccd_image, sourcelist, camera, observatory_location,
                "SKIPPING THIS IMAGE!")
         return None, None
 
-    # Set high pixels to NaN
+    # Set high pixels to NaN (make sure ccd_image.data is a float array first)
+    if ccd_image.data.dtype != np.float:
+        ccd_image.data = ccd_image.data.astype(np.float)
     ccd_image.data[ccd_image.data > max_adu] = np.nan
 
     # Extract necessary values from sourcelist structure