MatchPessimisticBTask¶
- class lsst.meas.astrom.MatchPessimisticBTask(**kwargs)¶
Bases:
Task
Match sources to reference objects.
Methods Summary
Empty (clear) the metadata for this Task and all sub-Tasks.
Get metadata for all tasks.
Get the task name as a hierarchical name including parent task names.
getName
()Get the name of the task.
Get a dictionary of all tasks as a shallow copy.
makeField
(doc)Make a
lsst.pex.config.ConfigurableField
for this task.makeSubtask
(name, **keyArgs)Create a subtask as a new instance as the
name
attribute of this task.matchObjectsToSources
(refCat, sourceCat, ...)Match sources to position reference stars
timer
(name[, logLevel])Context manager to log performance data for an arbitrary block of code.
Methods Documentation
- getFullMetadata() TaskMetadata ¶
Get metadata for all tasks.
- Returns:
- metadata
TaskMetadata
The keys are the full task name. Values are metadata for the top-level task and all subtasks, sub-subtasks, etc.
- metadata
Notes
The returned metadata includes timing information (if
@timer.timeMethod
is used) and any metadata set by the task. The name of each item consists of the full task name with.
replaced by:
, followed by.
and the name of the item, e.g.:topLevelTaskName:subtaskName:subsubtaskName.itemName
using
:
in the full task name disambiguates the rare situation that a task has a subtask and a metadata item with the same name.
- getFullName() str ¶
Get the task name as a hierarchical name including parent task names.
- Returns:
- fullName
str
The full name consists of the name of the parent task and each subtask separated by periods. For example:
The full name of top-level task “top” is simply “top”.
The full name of subtask “sub” of top-level task “top” is “top.sub”.
The full name of subtask “sub2” of subtask “sub” of top-level task “top” is “top.sub.sub2”.
- fullName
- getName() str ¶
Get the name of the task.
- Returns:
- taskName
str
Name of the task.
- taskName
See also
getFullName
Get the full name of the task.
- getTaskDict() dict[str, weakref.ReferenceType[lsst.pipe.base.task.Task]] ¶
Get a dictionary of all tasks as a shallow copy.
- Returns:
- taskDict
dict
Dictionary containing full task name: task object for the top-level task and all subtasks, sub-subtasks, etc.
- taskDict
- classmethod makeField(doc: str) ConfigurableField ¶
Make a
lsst.pex.config.ConfigurableField
for this task.- Parameters:
- doc
str
Help text for the field.
- doc
- Returns:
- configurableField
lsst.pex.config.ConfigurableField
A
ConfigurableField
for this task.
- configurableField
Examples
Provides a convenient way to specify this task is a subtask of another task.
Here is an example of use:
class OtherTaskConfig(lsst.pex.config.Config): aSubtask = ATaskClass.makeField("brief description of task")
- makeSubtask(name: str, **keyArgs: Any) None ¶
Create a subtask as a new instance as the
name
attribute of this task.- Parameters:
- name
str
Brief name of the subtask.
- **keyArgs
Extra keyword arguments used to construct the task. The following arguments are automatically provided and cannot be overridden:
config
.parentTask
.
- name
Notes
The subtask must be defined by
Task.config.name
, an instance ofConfigurableField
orRegistryField
.
- matchObjectsToSources(refCat, sourceCat, wcs, sourceFluxField, refFluxField, match_tolerance=None)¶
Match sources to position reference stars
- refCat
lsst.afw.table.SimpleCatalog
catalog of reference objects that overlap the exposure; reads fields for:
coord
the specified flux field
- sourceCat
lsst.afw.table.SourceCatalog
Catalog of sources found on an exposure. This should already be down-selected to “good”/”usable” sources in the calling Task.
- wcs
lsst.afw.geom.SkyWcs
estimated WCS
- sourceFluxField:
str
field of sourceCat to use for flux
- refFluxField
str
field of refCat to use for flux
- match_tolerance
lsst.meas.astrom.MatchTolerancePessimistic
is a MatchTolerance class object or
None
. This this class is used to communicate state between AstrometryTask and MatcherTask. AstrometryTask will also set the MatchTolerance class variable maxMatchDist based on the scatter AstrometryTask has found after fitting for the wcs.
- Returns:
- result
lsst.pipe.base.Struct
Result struct with components:
matches
: source to reference matches found (list
oflsst.afw.table.ReferenceMatch
)usableSourceCat
: a catalog of sources potentially usable for matching and WCS fitting (lsst.afw.table.SourceCatalog
).match_tolerance
: a MatchTolerance object containing the resulting state variables from the match (lsst.meas.astrom.MatchTolerancePessimistic
).
- result
- refCat