astro/fits2skymodel.py: Take absolute values (21 cm signal absorption)

1 files changed, 1 insertions, 1 deletions

diff --git a/astro/oskar/fits2skymodel.py b/astro/oskar/fits2skymodel.py
index 7d0295a..8627324 100755
--- a/astro/oskar/fits2skymodel.py
+++ b/astro/oskar/fits2skymodel.py
@@ -161,7 +161,7 @@ class SkyModel:
         flux : source (Stokes I) flux density (Jy)
         """
         if self.mask is None:
-            self.mask = self.image >= self.minvalue
+            self.mask = np.abs(self.image) >= self.minvalue
             logger.info("Use minimum threshold to determine output sky")
         else:
             logger.info("Use provided mask to determine output sky")