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# This file is part of obs_lsst. 

# 

# Developed for the LSST Data Management System. 

# This product includes software developed by the LSST Project 

# (http://www.lsst.org). 

# See the COPYRIGHT file at the top-level directory of this distribution 

# for details of code ownership. 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the GNU General Public License 

# along with this program. If not, see <http://www.gnu.org/licenses/>. 

 

__all__ = () 

 

from lsst.obs.base import FilterDefinition, FilterDefinitionCollection 

from .translators.lsst import FILTER_DELIMITER 

 

 

LSSTCAM_FILTER_DEFINITIONS = FilterDefinitionCollection( 

FilterDefinition(physical_filter="NONE", 

lambdaEff=0.0, 

alias={"no_filter", "OPEN"}), 

FilterDefinition(physical_filter="275CutOn", 

lambdaEff=0.0), 

FilterDefinition(physical_filter="550CutOn", 

lambdaEff=0.0), 

# The LSST Filters from L. Jones 04/07/10 

FilterDefinition(physical_filter="u", 

abstract_filter="u", 

lambdaEff=364.59, lambdaMin=324.0, lambdaMax=395.0), 

FilterDefinition(physical_filter="g", 

abstract_filter="g", 

lambdaEff=476.31, lambdaMin=405.0, lambdaMax=552.0), 

FilterDefinition(physical_filter="r", 

abstract_filter="r", 

lambdaEff=619.42, lambdaMin=552.0, lambdaMax=691.0), 

FilterDefinition(physical_filter="i", 

abstract_filter="i", 

lambdaEff=752.06, lambdaMin=818.0, lambdaMax=921.0), 

FilterDefinition(physical_filter="z", 

abstract_filter="z", 

lambdaEff=866.85, lambdaMin=922.0, lambdaMax=997.0), 

# official y filter 

FilterDefinition(physical_filter="y", 

abstract_filter="y", 

lambdaEff=971.68, lambdaMin=975.0, lambdaMax=1075.0, alias=['y4']), 

) 

 

# LATISS filters include a grating in the name so we need to construct 

# filters for each combination of filter+grating. 

_latiss_filters = ( 

FilterDefinition(physical_filter="NONE", 

lambdaEff=0.0, 

alias={"no_filter", "OPEN"}), 

FilterDefinition(physical_filter="blank_bk7_wg05", 

lambdaEff=0.0), 

FilterDefinition(physical_filter="KPNO_1111_436nm", 

abstract_filter="g", 

lambdaEff=436.0, lambdaMin=386.0, lambdaMax=486.0), 

FilterDefinition(physical_filter="KPNO_373A_677nm", 

abstract_filter="r", 

lambdaEff=677.0, lambdaMin=624.0, lambdaMax=730.0), 

FilterDefinition(physical_filter="KPNO_406_828nm", 

abstract_filter="z", 

lambdaEff=828.0, lambdaMin=738.5, lambdaMax=917.5), 

FilterDefinition(physical_filter="diffuser", 

lambdaEff=0.0), 

FilterDefinition(physical_filter="EMPTY", 

lambdaEff=0.0), 

FilterDefinition(physical_filter="????", 

lambdaEff=0.0), 

) 

 

# Form a new set of filter definitions from all the explicit filters 

_latiss_gratings = ("ronchi90lpmm", "ronchi170lpmm", "EMPTY", "????", "NONE") 

 

# Include the filters without the grating in case someone wants 

# to retrieve a filter by an actual filter name 

_latiss_filter_and_grating = [f for f in _latiss_filters] 

 

for filter in _latiss_filters: 

for grating in _latiss_gratings: 

# FilterDefinition is a frozen dataclass 

new_name = FILTER_DELIMITER.join([filter.physical_filter, grating]) 

 

# Also need to update aliases 

new_aliases = {FILTER_DELIMITER.join([a, grating]) for a in filter.alias} 

 

combo = FilterDefinition(physical_filter=new_name, 

lambdaEff=filter.lambdaEff, 

lambdaMin=filter.lambdaMin, 

lambdaMax=filter.lambdaMax, 

alias=new_aliases) 

_latiss_filter_and_grating.append(combo) 

 

 

LATISS_FILTER_DEFINITIONS = FilterDefinitionCollection(*_latiss_filter_and_grating)