23 from builtins
import zip
27 import lsst.coadd.utils
30 from .forcedPhotImage
import ForcedPhotImageConfig, ForcedPhotImageTask
32 __all__ = (
"ForcedPhotCoaddConfig",
"ForcedPhotCoaddTask")
36 footprintDatasetName = lsst.pex.config.Field(
37 doc=
"Dataset (without coadd prefix) that should be used to obtain (Heavy)Footprints for sources. " 38 "Must have IDs that match those of the reference catalog." 39 "If None, Footprints will be generated by transforming the reference Footprints.",
46 ForcedPhotImageTask.ConfigClass.setDefaults(self)
53 self.
measurement.plugins.names |= [
'base_InputCount',
'base_Variance']
54 self.
measurement.plugins[
'base_PixelFlags'].masksFpAnywhere = [
'CLIPPED',
'SENSOR_EDGE',
56 self.
measurement.plugins[
'base_PixelFlags'].masksFpCenter = [
'CLIPPED',
'SENSOR_EDGE',
60 ForcedPhotImageTask.ConfigClass.validate(self)
63 raise ValueError(
"Cannot use removePatchOverlaps=True with deblended footprints, as parent " 64 "sources may be rejected while their children are not.")
76 A command-line driver for performing forced measurement on coadd images 78 This task is a subclass of ForcedPhotImageTask which is specifically for doing forced 79 measurement on a coadd, using as a reference catalog detections which were made on overlapping 80 coadds (i.e. in other bands). 82 The run method (inherited from ForcedPhotImageTask) takes a lsst.daf.persistence.ButlerDataRef 83 argument that corresponds to a coadd image. This is used to provide all the inputs and outputs 85 - A "*Coadd_src" (e.g. "deepCoadd_src") dataset is used as the reference catalog. This not loaded 86 directly from the passed dataRef, however; only the patch and tract are used, while the filter 87 is set by the configuration for the references subtask (see CoaddSrcReferencesTask). 88 - A "*Coadd_calexp" (e.g. "deepCoadd_calexp") dataset is used as the measurement image. Note that 89 this means that ProcessCoaddTask must be run on an image before ForcedPhotCoaddTask, in order 90 to generate the "*Coadd_calexp" dataset. 91 - A "*Coadd_forced_src" (e.g. "deepCoadd_forced_src") dataset will be written with the output 94 In addition to the run method, ForcedPhotCcdTask overrides several methods of ForcedPhotImageTask 95 to specialize it for coadd processing, including makeIdFactory() and fetchReferences(). None of these 96 should be called directly by the user, though it may be useful to override them further in subclasses. 99 ConfigClass = ForcedPhotCoaddConfig
100 RunnerClass = lsst.pipe.base.ButlerInitializedTaskRunner
101 _DefaultName =
"forcedPhotCoadd" 102 dataPrefix =
"deepCoadd_" 105 name = self.config.coaddName +
"Coadd_calexp" 106 return dataRef.get(name)
if dataRef.datasetExists(name)
else None 109 """Create an object that generates globally unique source IDs from per-CCD IDs and the CCD ID. 111 @param dataRef Data reference from butler. The "CoaddId_bits" and "CoaddId" 112 datasets are accessed. The data ID must have tract and patch keys. 119 expBits = dataRef.get(self.config.coaddName +
"CoaddId_bits")
120 expId = int(dataRef.get(self.config.coaddName +
"CoaddId"))
124 return int(dataRef.get(self.config.coaddName +
"CoaddId"))
127 """Return an iterable of reference sources which overlap the exposure 129 @param dataRef Data reference from butler corresponding to the image to be measured; 130 should have tract, patch, and filter keys. 131 @param exposure lsst.afw.image.Exposure to be measured (not used by this implementation) 133 All work is delegated to the references subtask; see CoaddSrcReferencesTask for information 134 about the default behavior. 136 skyMap = dataRef.get(self.
dataPrefix +
"skyMap", immediate=
True)
137 tractInfo = skyMap[dataRef.dataId[
"tract"]]
138 patch = tuple(int(v)
for v
in dataRef.dataId[
"patch"].split(
","))
139 patchInfo = tractInfo.getPatchInfo(patch)
141 references.extend(self.references.fetchInPatches(dataRef, patchList=[patchInfo]))
145 """For coadd forced photometry, we use the deblended HeavyFootprints from the single-band 146 measurements of the same band - because we've guaranteed that the peaks (and hence child sources) 147 will be consistent across all bands before we get to measurement, this should yield reasonable 148 deblending for most sources. It's most likely limitation is that it will not provide good flux 149 upper limits for sources that were not detected in this band but were blended with sources that 152 if self.config.footprintDatasetName
is None:
153 return ForcedPhotImageTask.attachFootprints(self, sources, refCat, exposure, refWcs, dataRef)
154 self.log.info(
"Loading deblended footprints for sources from %s, %s" %
155 (self.config.footprintDatasetName, dataRef.dataId))
156 fpCat = dataRef.get(
"%sCoadd_%s" % (self.config.coaddName, self.config.footprintDatasetName),
158 for refRecord, srcRecord
in zip(refCat, sources):
159 fpRecord = fpCat.find(refRecord.getId())
161 raise LookupError(
"Cannot find Footprint for source %s; please check that %sCoadd_%s " 162 "IDs are compatible with reference source IDs" %
163 (srcRecord.getId(), self.config.coaddName,
164 self.config.footprintDatasetName))
165 srcRecord.setFootprint(fpRecord.getFootprint())
168 def _makeArgumentParser(cls):
169 parser = lsst.pipe.base.ArgumentParser(name=cls.
_DefaultName)
170 parser.add_id_argument(
"--id",
"deepCoadd_forced_src", help=
"data ID, with raw CCD keys + tract",
171 ContainerClass=lsst.coadd.utils.CoaddDataIdContainer)
A base class for command-line forced measurement drivers.
static std::shared_ptr< IdFactory > makeSource(RecordId expId, int reserved)
def getExposure(self, dataRef)
def attachFootprints(self, sources, refCat, exposure, refWcs, dataRef)
A command-line driver for performing forced measurement on coadd images.
def makeIdFactory(self, dataRef)
def getExposureId(self, dataRef)
Config class for forced measurement driver task.
def fetchReferences(self, dataRef, exposure)