26 import lsst.coadd.utils
29 from .forcedPhotImage
import ForcedPhotImageConfig, ForcedPhotImageTask
31 __all__ = (
"ForcedPhotCoaddConfig",
"ForcedPhotCoaddTask")
35 footprintDatasetName = lsst.pex.config.Field(
36 doc=
"Dataset (without coadd prefix) that should be used to obtain (Heavy)Footprints for sources. " 37 "Must have IDs that match those of the reference catalog." 38 "If None, Footprints will be generated by transforming the reference Footprints.",
45 ForcedPhotImageTask.ConfigClass.setDefaults(self)
52 self.
measurement.plugins.names |= [
'base_InputCount',
'base_Variance']
53 self.
measurement.plugins[
'base_PixelFlags'].masksFpAnywhere = [
'CLIPPED',
'SENSOR_EDGE',
54 'REJECTED',
'INEXACT_PSF']
55 self.
measurement.plugins[
'base_PixelFlags'].masksFpCenter = [
'CLIPPED',
'SENSOR_EDGE',
56 'REJECTED',
'INEXACT_PSF']
59 ForcedPhotImageTask.ConfigClass.validate(self)
62 raise ValueError(
"Cannot use removePatchOverlaps=True with deblended footprints, as parent " 63 "sources may be rejected while their children are not.")
74 """Get the psfCache setting into ForcedPhotCoaddTask""" 77 return lsst.pipe.base.ButlerInitializedTaskRunner.getTargetList(parsedCmd,
78 psfCache=parsedCmd.psfCache)
83 A command-line driver for performing forced measurement on coadd images 85 This task is a subclass of ForcedPhotImageTask which is specifically for doing forced 86 measurement on a coadd, using as a reference catalog detections which were made on overlapping 87 coadds (i.e. in other bands). 89 The run method (inherited from ForcedPhotImageTask) takes a lsst.daf.persistence.ButlerDataRef 90 argument that corresponds to a coadd image. This is used to provide all the inputs and outputs 92 - A "*Coadd_src" (e.g. "deepCoadd_src") dataset is used as the reference catalog. This not loaded 93 directly from the passed dataRef, however; only the patch and tract are used, while the filter 94 is set by the configuration for the references subtask (see CoaddSrcReferencesTask). 95 - A "*Coadd_calexp" (e.g. "deepCoadd_calexp") dataset is used as the measurement image. Note that 96 this means that ProcessCoaddTask must be run on an image before ForcedPhotCoaddTask, in order 97 to generate the "*Coadd_calexp" dataset. 98 - A "*Coadd_forced_src" (e.g. "deepCoadd_forced_src") dataset will be written with the output 101 In addition to the run method, ForcedPhotCcdTask overrides several methods of ForcedPhotImageTask 102 to specialize it for coadd processing, including makeIdFactory() and fetchReferences(). None of these 103 should be called directly by the user, though it may be useful to override them further in subclasses. 106 ConfigClass = ForcedPhotCoaddConfig
107 RunnerClass = lsst.pipe.base.ButlerInitializedTaskRunner
108 _DefaultName =
"forcedPhotCoadd" 109 dataPrefix =
"deepCoadd_" 112 name = self.config.coaddName +
"Coadd_calexp" 113 return dataRef.get(name)
if dataRef.datasetExists(name)
else None 116 """Create an object that generates globally unique source IDs from per-CCD IDs and the CCD ID. 118 @param dataRef Data reference from butler. The "CoaddId_bits" and "CoaddId" 119 datasets are accessed. The data ID must have tract and patch keys. 126 expBits = dataRef.get(self.config.coaddName +
"CoaddId_bits")
127 expId = int(dataRef.get(self.config.coaddName +
"CoaddId"))
131 return int(dataRef.get(self.config.coaddName +
"CoaddId"))
134 """Return an iterable of reference sources which overlap the exposure 136 @param dataRef Data reference from butler corresponding to the image to be measured; 137 should have tract, patch, and filter keys. 138 @param exposure lsst.afw.image.Exposure to be measured (not used by this implementation) 140 All work is delegated to the references subtask; see CoaddSrcReferencesTask for information 141 about the default behavior. 143 skyMap = dataRef.get(self.
dataPrefix +
"skyMap", immediate=
True)
144 tractInfo = skyMap[dataRef.dataId[
"tract"]]
145 patch = tuple(int(v)
for v
in dataRef.dataId[
"patch"].split(
","))
146 patchInfo = tractInfo.getPatchInfo(patch)
148 references.extend(self.references.fetchInPatches(dataRef, patchList=[patchInfo]))
152 """For coadd forced photometry, we use the deblended HeavyFootprints from the single-band 153 measurements of the same band - because we've guaranteed that the peaks (and hence child sources) 154 will be consistent across all bands before we get to measurement, this should yield reasonable 155 deblending for most sources. It's most likely limitation is that it will not provide good flux 156 upper limits for sources that were not detected in this band but were blended with sources that 159 if self.config.footprintDatasetName
is None:
160 return ForcedPhotImageTask.attachFootprints(self, sources, refCat, exposure, refWcs, dataRef)
161 self.log.info(
"Loading deblended footprints for sources from %s, %s" %
162 (self.config.footprintDatasetName, dataRef.dataId))
163 fpCat = dataRef.get(
"%sCoadd_%s" % (self.config.coaddName, self.config.footprintDatasetName),
165 for refRecord, srcRecord
in zip(refCat, sources):
166 fpRecord = fpCat.find(refRecord.getId())
168 raise LookupError(
"Cannot find Footprint for source %s; please check that %sCoadd_%s " 169 "IDs are compatible with reference source IDs" %
170 (srcRecord.getId(), self.config.coaddName,
171 self.config.footprintDatasetName))
172 srcRecord.setFootprint(fpRecord.getFootprint())
175 def _makeArgumentParser(cls):
176 parser = lsst.pipe.base.ArgumentParser(name=cls.
_DefaultName)
177 parser.add_id_argument(
"--id",
"deepCoadd_forced_src", help=
"data ID, with raw CCD keys + tract",
178 ContainerClass=lsst.coadd.utils.CoaddDataIdContainer)
179 parser.add_argument(
"--psfCache", type=int, default=100, help=
"Size of CoaddPsf cache")
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)
def getTargetList(parsedCmd, kwargs)
Config class for forced measurement driver task.
def fetchReferences(self, dataRef, exposure)