Replace negative SNR to 0

ysBach · Feb 15, 2023 · 5304abc · 5304abc
1 parent 8616cd9
commit 5304abc
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/ysphotutilpy/apphot.py b/ysphotutilpy/apphot.py
@@ -293,6 +293,7 @@ def _propagate_ccdmask(ccd, additional_mask=None):
 
     phot["source_sum_err"] = np.sqrt(var_errmap + var_skyrand)
     snr = np.array(phot['source_sum'])/np.array(phot["source_sum_err"])
+    snr[snr < 0] = 0
     phot["mag"] = -2.5*np.log10(phot['source_sum']/t_exposure)
     phot["merr"] = 2.5/np.log(10)*(1/snr)
     phot["snr"] = snr