lsst.meas.astrom¶
Tasks and methods for finding an astrometric solution, including:
AstrometryTask
compute an astrometric solution for a set of sources detectedon an Exposure
Default subtasks used by AstrometryTask
:
MatchOptimisticBTask
match sources to reference objectsFitTanSipWcsTask
fit a TAN-SIP WCS given a list of matches of sourcesand reference objects
Contributing¶
lsst.meas.astrom
is developed at https://github.com/lsst/meas_astrom.
You can find Jira issues for this module under here.
Task reference¶
Tasks¶
- AstrometryTask
Match an input source catalog with objects from a reference catalog and solve for the WCS.
- DirectMatchTask
Simple, brute force matching of a source catalog to a reference catalog.
- FitSipDistortionTask
Fit a TAN-SIP WCS given a list of reference object/source matches.
- FitTanSipWcsTask
Fit a TAN-SIP WCS given a list of reference object/source matches.
- MatchOptimisticBTask
Match sources to reference objects using the Optimistic Pattern Matcher B algorithm of Tabur 2007.
- MatchPessimisticBTask
Match sources to reference objects.
- RefMatchTask
Match an input source catalog with objects from a reference catalog.
Python API reference¶
lsst.meas.astrom Package¶
Functions¶
|
Approximate an existing WCS as a TAN-SIP WCS |
|
Overloaded function. |
|
Generate a denormalized Catalog of matches |
|
Show an astrometry debug image. |
|
Overloaded function. |
|
Overloaded function. |
|
Overloaded function. |
|
Overloaded function. |
|
Overloaded function. |
|
|
|
Plot reference objects, sources and matches |
|
|
|
|
|
Set the distance field of the matches in a match list to the distance in radians on the sky. |
|
Classes¶
|
Config for AstrometryTask. |
|
Parent class for failures in astrometric fitting. |
|
Raised if the astrometry fitter fails. |
|
Match an input source catalog with objects from a reference catalog and solve for the WCS. |
|
Raised if the quality of the astrometric fit is worse than some threshold. |
|
Store frequently-reference (meta)data relevant for matching a catalog. |
|
A catalog with sources with coordinate columns in some standard format/units. |
|
Configuration for the MatchProbabilistic matcher. |
|
Configuration for |
|
Configuration for |
|
Simple, brute force matching of a source catalog to a reference catalog. |
|
Config for FitTanSipWcsTask. |
|
Fit a TAN-SIP WCS given a list of reference object/source matches. |
|
Config for FitSipDistortionTask |
|
Fit a TAN-SIP WCS given a list of reference object/source matches. |
|
Config for FitTanSipWcsTask. |
|
Fit a TAN-SIP WCS given a list of reference object/source matches. |
|
Configuration for MatchOptimisticBTask |
|
Match sources to reference objects using the Optimistic Pattern Matcher B algorithm of Tabur 2007. |
|
Configuration for MatchPessimisticBTask |
|
Match sources to reference objects. |
|
Configuration for the MatchProbabilistic matcher. |
|
Run MatchProbabilistic on a reference and target catalog covering the same tract. |
|
Stores match tolerances for use in |
|
Stores match tolerances for use in AstrometryTask and later iterations of the matcher. |
|
Raised if the matcher fails. |
|
A probabilistic, greedy catalog matcher. |
|
Class implementing a pessimistic version of Optimistic Pattern Matcher B (OPMb) from `Tabur (2007)`_, as described in `DMTN-031`_ |
|
|
|
Match an input source catalog with objects from a reference catalog. |
|
Convenience class for appending a shifting an input SkyWcs on sky and appending an affine transform. |