FilterDefinition¶
-
class
lsst.obs.base.
FilterDefinition
(physical_filter: str, lambdaEff: float, band: str = None, afw_name: str = None, lambdaMin: float = nan, lambdaMax: float = nan, alias: set = frozenset())¶ Bases:
object
The definition of an instrument’s filter bandpass.
This class is used to interface between the
Filter
class and the Gen2CameraMapper
and Gen3Instruments
andphysical_filter
/band
Dimension
.This class is likely temporary, until we have a better versioned filter definition system that includes complete transmission information.
Attributes Summary
afw_name
If not None, the name of the Filter
object.alias
Alternate names for this filter. band
The generic name of a filter not associated with a particular instrument (e.g. lambdaMax
The maximum wavelength of this filter (nm; defined as 1% throughput) lambdaMin
The minimum wavelength of this filter (nm; defined as 1% throughput) Methods Summary
defineFilter
()Declare the filters via afw.image.Filter. makeFilterLabel
()Create a complete FilterLabel for this filter. Attributes Documentation
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afw_name
= None¶ If not None, the name of the
Filter
object.This is distinct from physical_filter and band to maintain backwards compatibility in some obs packages. For example, for HSC there are two distinct
r
andi
filters, namedr/r2
andi/i2
.
-
alias
= frozenset()¶ Alternate names for this filter. These are added to the
Filter
alias list.
-
band
= None¶ The generic name of a filter not associated with a particular instrument (e.g.
r
for the SDSS Gunn r-band, which could be on SDSS, LSST, or HSC).Not all filters have an abstract filter: engineering or test filters may not have a genericly-termed filter name.
If specified and if
afw_name
is None, this is used as theFilter
name
field, otherwise it is added to the list ofFilter
aliases.
-
lambdaMax
= nan¶ The maximum wavelength of this filter (nm; defined as 1% throughput)
-
lambdaMin
= nan¶ The minimum wavelength of this filter (nm; defined as 1% throughput)
Methods Documentation
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defineFilter
()¶ Declare the filters via afw.image.Filter.
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makeFilterLabel
()¶ Create a complete FilterLabel for this filter.
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