Use getBandpass instead of getBandpasses when appropriate

Author: arunkannawadi

galsim/roman/roman_config.py

@@ -20,7 +20,7 @@
 from . import n_pix, exptime, dark_current, read_noise, gain
 from . import stray_light_fraction, thermal_backgrounds
 from .roman_psfs import getPSF
-from .roman_bandpass import getBandpasses
+from .roman_bandpass import getBandpass, getBandpasses
 from .roman_wcs import getWCS
 from .roman_backgrounds import getSkyLevel
 from ..config import ParseAberrations, BandpassBuilder, GetAllParams, GetRNG
@@ -112,7 +112,7 @@ def buildBandpass(self, config, base, logger):
             from ..deprecated import depr
             depr('W149', 2.5, 'W146', 'Note: this is to match current Roman filter naming schemes')
             name = 'W146'
-        bandpass = getBandpasses(include_all_bands=True)[name]
+        bandpass = getBandpass(name)
 
         return bandpass, safe
 

galsim/roman/roman_psfs.py

@@ -22,7 +22,7 @@
 from . import pixel_scale, n_pix, pixel_scale_mm
 from . import n_pix, n_sca, longwave_bands, shortwave_bands
 from . import diameter, obscuration
-from .roman_bandpass import getBandpasses
+from .roman_bandpass import getBandpass
 
 from ..utilities import LRU_Cache
 from ..position import PositionD
@@ -335,8 +335,7 @@ def _get_single_PSF(SCA, bandpass, SCA_pos, pupil_bin,
                                   aper=aper, gsparams=gsparams)
         if n_waves is not None:
             # To decide the range of wavelengths to use, check the bandpass.
-            bp_dict = getBandpasses(include_all_bands=True)
-            bp = bp_dict[bandpass]
+            bp = getBandpass(bandpass)
             PSF = PSF.interpolate(waves=np.linspace(bp.blue_limit, bp.red_limit, n_waves),
                                   oversample_fac=1.5)
     else: