Prepare the possibility to compute continuum only fluxes

Prepare to make it possible to get the flux in a filter without taking
into account the contribution from the spectral lines.

pcigale/sed/__init__.py

@@ -39,7 +39,6 @@ Such SED is characterised by:
 
 import numpy as np
 from . import utils
-from itertools import chain
 from scipy.constants import c
 from scipy.interpolate import interp1d
 
@@ -309,7 +308,8 @@ class SED(object):
         return self.luminosities[idx]
 
     def compute_fnu(self, transmission, lambda_eff,
-                    redshift=0, apply_redshift=False):
+                    redshift=0, apply_redshift=False,
+                    add_line_fluxes=True):
         """
         Compute the Fν flux density corresponding the filter which
         transmission is given.
@@ -349,6 +349,10 @@ class SED(object):
             flux. The default is False because we generally use a specific
             module to apply the redshift.
 
+        add_line_flux : boolean
+            If true (default), the flux coming from the spectral lines will be
+            taken into account.
+
         Return
         ------
         fnu : float

pcigale/sed/modules/dustatt_calzleit.py

@@ -275,12 +275,13 @@ class Module(common.SEDCreationModule):
         powerlaw_slope = float(self.parameters["powerlaw_slope"])
         filters = self.filters
 
-        # Fλ fluxes in each filter before attenuation.
+        # Fλ fluxes (only from continuum) in each filter before attenuation.
         flux_noatt = {}
         for filter_name, filter_ in filters.items():
             flux_noatt[filter_name] = sed.compute_fnu(
                 filter_.trans_table,
-                filter_.effective_wavelength)
+                filter_.effective_wavelength,
+                add_line_fluxes=False)
 
         # Compute attenuation curve
         sel_attenuation = a_vs_ebv(wavelength, uv_bump_wavelength,
@@ -340,12 +341,13 @@ class Module(common.SEDCreationModule):
         sed.add_info(name + "_attenuation",
                      attenuation_young + attenuation_old)
 
-        # Fλ fluxes in each filter after attenuation.
+        # Fλ fluxes (only from continuum) in each filter after attenuation.
         flux_att = {}
         for filter_name, filter_ in filters.items():
             flux_att[filter_name] = sed.compute_fnu(
                 filter_.trans_table,
-                filter_.effective_wavelength)
+                filter_.effective_wavelength,
+                add_line_fluxes=False)
 
         # Attenuation in each filter
         for filter_name in filters:

pcigale/sed/modules/dustatt_powerlaw.py

@@ -196,12 +196,13 @@ class Module(common.SEDCreationModule):
         powerlaw_slope = float(self.parameters["powerlaw_slope"])
         filters = self.filters
 
-        # Fλ fluxes in each filter before attenuation.
+        # Fλ fluxes (only from continuum)) in each filter before attenuation.
         flux_noatt = {}
         for filter_name, filter_ in filters.items():
             flux_noatt[filter_name] = sed.compute_fnu(
                 filter_.trans_table,
-                filter_.effective_wavelength)
+                filter_.effective_wavelength,
+                add_line_fluxes=False)
 
         # Compute attenuation curve
         sel_attenuation = alambda_av(wavelength, powerlaw_slope,
@@ -259,12 +260,13 @@ class Module(common.SEDCreationModule):
         sed.add_info(name + "_attenuation",
                      attenuation_young + attenuation_old)
 
-        # Fλ fluxes in each filter after attenuation.
+        # Fλ fluxes (only in continuum) in each filter after attenuation.
         flux_att = {}
         for filter_name, filter_ in filters.items():
             flux_att[filter_name] = sed.compute_fnu(
                 filter_.trans_table,
-                filter_.effective_wavelength)
+                filter_.effective_wavelength,
+                add_line_fluxes=False)
 
         # Attenuation in each filter
         for filter_name in filters: