only penalize negative [OII] when fitting with GALAXY+PCA

py/redrock/templates.py

@@ -158,10 +158,10 @@ def __init__(self, filename=None, spectype=None, redshifts=None,
             raise ValueError(f'Template method {self._method} unrecognized; '
                               f'should be one of {valid_template_methods}')
 
-        #- Special case for GALAXY templates: cache subset of template that
-        #- covers [OII] but only for GALAXY templates and fitting methods which
-        #- can include negative templates or coefficients.
-        if self._rrtype == 'GALAXY' and not self._method in ("NMF", "NNLS"):
+        # Special case for GALAXY templates and PCA fitting, which can include
+        # negative templates or coefficients: Cache a template that covers just
+        # [OII].
+        if self._rrtype == 'GALAXY' and self._method == "PCA":
             isOII = (3724 <= self.wave) & (self.wave <= 3733)
             self.OIItemplate = self.flux[:,isOII]