6 #include "Eigen/Sparse" 20 void PhotometryFit::leastSquareDerivativesMeasurement(CcdImage
const &
ccdImage, TripletList &tripletList,
21 Eigen::VectorXd &grad,
22 MeasuredStarList
const *measuredStarList)
const {
31 if (measuredStarList) assert(&(measuredStarList->front()->getCcdImage()) == &ccdImage);
33 unsigned nparModel = (_fittingModel) ? _photometryModel->getNpar(ccdImage) : 0;
34 unsigned nparFlux = (_fittingFluxes) ? 1 : 0;
35 unsigned nparTotal = nparModel + nparFlux;
37 if (_fittingModel) _photometryModel->getMappingIndices(ccdImage, indices);
39 Eigen::VectorXd H(nparTotal);
41 unsigned kTriplets = tripletList.getNextFreeIndex();
42 const MeasuredStarList &catalog = (measuredStarList) ? *measuredStarList : ccdImage.getCatalogForFit();
44 for (
auto const &measuredStar : catalog) {
45 if (!measuredStar->isValid())
continue;
48 TweakPhotomMeasurementErrors(inPos, *measuredStar, _fluxError);
52 double residual = _photometryModel->transform(ccdImage, *measuredStar, measuredStar->getInstFlux()) -
53 measuredStar->getFittedStar()->getFlux();
55 double inverseSigma = 1.0 / _photometryModel->transformError(ccdImage, *measuredStar,
56 measuredStar->getInstFluxErr());
57 double W =
std::pow(inverseSigma, 2);
60 _photometryModel->computeParameterDerivatives(*measuredStar, ccdImage, H);
61 for (
unsigned k = 0; k < indices.size(); k++) {
62 unsigned l = indices[k];
63 tripletList.addTriplet(l, kTriplets, H[k] * inverseSigma);
64 grad[l] += H[k] * W * residual;
68 unsigned index = measuredStar->getFittedStar()->getIndexInMatrix();
70 tripletList.addTriplet(index, kTriplets, -1.0 * inverseSigma);
71 grad[index] += -1.0 * W * residual;
76 tripletList.setNextFreeIndex(kTriplets);
79 void PhotometryFit::leastSquareDerivativesReference(FittedStarList
const &fittedStarList,
80 TripletList &tripletList, Eigen::VectorXd &grad)
const {
87 if (!_fittingFluxes)
return;
91 unsigned kTriplets = tripletList.getNextFreeIndex();
93 for (
auto const &fittedStar : fittedStarList) {
94 auto refStar = fittedStar->getRefStar();
95 if (refStar ==
nullptr)
continue;
102 double inverseSigma = 1.0 / refStar->getFluxErr();
104 double residual = fittedStar->getFlux() - refStar->getFlux();
106 unsigned index = fittedStar->getIndexInMatrix();
108 tripletList.addTriplet(index, kTriplets, 1.0 * inverseSigma);
109 grad(index) += 1.0 *
std::pow(inverseSigma, 2) * residual;
112 tripletList.setNextFreeIndex(kTriplets);
115 void PhotometryFit::accumulateStatImageList(
CcdImageList const &ccdImageList, Chi2Accumulator &accum)
const {
120 for (
auto const &ccdImage : ccdImageList) {
121 auto &catalog = ccdImage->getCatalogForFit();
123 for (
auto const &measuredStar : catalog) {
124 if (!measuredStar->isValid())
continue;
125 double sigma = _photometryModel->transformError(*ccdImage, *measuredStar,
126 measuredStar->getInstFluxErr());
128 TweakPhotomMeasurementErrors(inPos, measuredStar, _fluxError);
131 _photometryModel->transform(*ccdImage, *measuredStar, measuredStar->getInstFlux()) -
132 measuredStar->getFittedStar()->getFlux();
134 double chi2Val =
std::pow(residual / sigma, 2);
135 accum.addEntry(chi2Val, 1, measuredStar);
140 void PhotometryFit::accumulateStatRefStars(Chi2Accumulator &accum)
const {
146 FittedStarList &fittedStarList =
_associations->fittedStarList;
147 for (
auto const &fittedStar : fittedStarList) {
148 auto refStar = fittedStar->getRefStar();
149 if (refStar ==
nullptr)
continue;
150 double chi2 =
std::pow(((fittedStar->getFlux() - refStar->getFlux()) / refStar->getFluxErr()), 2);
151 accum.addEntry(chi2, 1, fittedStar);
158 void PhotometryFit::getIndicesOfMeasuredStar(MeasuredStar
const &measuredStar,
162 _photometryModel->getMappingIndices(measuredStar.getCcdImage(), indices);
164 if (_fittingFluxes) {
166 unsigned fsIndex = fs->getIndexInMatrix();
175 _fittingFluxes = (
_whatToFit.
find(
"Fluxes") != std::string::npos);
178 _nParModel = (_fittingModel) ? _photometryModel->assignIndices(whatToFit, 0) : 0;
179 unsigned ipar = _nParModel;
181 if (_fittingFluxes) {
187 fittedStar->setIndexInMatrix(ipar);
191 _nParFluxes = ipar - _nParModel;
194 "nParameters total: " <<
_nParTot <<
" model: " << _nParModel <<
" fluxes: " << _nParFluxes);
200 "PhotometryFit::offsetParams : the provided vector length is not compatible with " 201 "the current whatToFit setting");
202 if (_fittingModel) _photometryModel->offsetParams(delta);
204 if (_fittingFluxes) {
209 unsigned index = fittedStar->getIndexInMatrix();
210 fittedStar->getFlux() -= delta(index);
219 ofile <<
"#id" << separator <<
"xccd" << separator <<
"yccd" << separator;
220 ofile <<
"mag" << separator;
221 ofile <<
"instFlux" << separator <<
"instFluxErr" << separator;
222 ofile <<
"inputFlux" << separator <<
"inputFluxErr" << separator;
223 ofile <<
"transformedFlux" << separator <<
"transformedFluxErr" << separator;
224 ofile <<
"fittedFlux" << separator;
225 ofile <<
"mjd" << separator <<
"color" << separator;
226 ofile <<
"fsindex" << separator;
227 ofile <<
"ra" << separator <<
"dec" << separator;
228 ofile <<
"chi2" << separator <<
"nm" << separator;
229 ofile <<
"chip" << separator <<
"visit" << separator <<
std::endl;
231 ofile <<
"#id in source catalog" << separator <<
"coordinates in CCD" << separator << separator;
232 ofile <<
"rough mag" << separator;
233 ofile <<
"measured instrument flux (ADU)" << separator <<
"measured instrument flux error" << separator;
234 ofile <<
"measured flux (maggies)" << separator <<
"measured flux error" << separator;
235 ofile << separator << separator;
236 ofile <<
"fitted flux (maggies)" << separator;
237 ofile <<
"modified Julian date of the measurement" << separator <<
"currently unused" << separator;
238 ofile <<
"unique index of the fittedStar" << separator;
239 ofile <<
"on-sky position of fitted star" << separator << separator;
240 ofile <<
"contribution to Chi2 (1 dof)" << separator <<
"number of measurements of this FittedStar" 242 ofile <<
"chip id" << separator <<
"visit id" <<
std::endl;
245 for (
auto const &ccdImage : ccdImageList) {
247 for (
auto const &measuredStar : cat) {
248 if (!measuredStar->isValid())
continue;
249 double sigma = _photometryModel->transformError(*ccdImage, *measuredStar,
250 measuredStar->getInstFluxErr());
252 tweakPhotomMeasurementErrors(inPos, measuredStar, _fluxError);
254 double flux = _photometryModel->transform(*ccdImage, *measuredStar, measuredStar->getInstFlux());
255 double fluxErr = _photometryModel->transformError(*ccdImage, *measuredStar,
256 measuredStar->getInstFluxErr());
257 double jd = ccdImage->getMjd();
259 double residual = flux - fittedStar->getFlux();
260 double chi2Val =
std::pow(residual / sigma, 2);
263 ofile << measuredStar->getId() << separator << measuredStar->x << separator << measuredStar->y
265 ofile << fittedStar->getMag() << separator;
266 ofile << measuredStar->getInstFlux() << separator << measuredStar->getInstFluxErr() << separator;
267 ofile << measuredStar->getFlux() << separator << measuredStar->getFluxErr() << separator;
268 ofile << flux << separator << fluxErr << separator << fittedStar->getFlux() << separator;
269 ofile << jd << separator << fittedStar->color << separator;
270 ofile << fittedStar->getIndexInMatrix() << separator;
271 ofile << fittedStar->x << separator << fittedStar->y << separator;
272 ofile << chi2Val << separator << fittedStar->getMeasurementCount() << separator;
273 ofile << ccdImage->getCcdId() << separator << ccdImage->getVisit() <<
std::endl;
282 ofile <<
"#ra" << separator <<
"dec " << separator;
283 ofile <<
"mag" << separator <<
"color" << separator;
284 ofile <<
"refFlux" << separator <<
"refFluxErr" << separator;
285 ofile <<
"fittedFlux" << separator <<
"fittedFluxErr" << separator;
286 ofile <<
"fsindex" << separator <<
"chi2" << separator <<
"nm" <<
std::endl;
288 ofile <<
"#coordinates of fittedStar" << separator << separator;
289 ofile <<
"magnitude" << separator <<
"currently unused" << separator;
290 ofile <<
"refStar flux (maggies)" << separator <<
"refStar fluxErr" << separator;
291 ofile <<
"fittedStar flux (maggies)" << separator <<
"fittedStar fluxErr" << separator;
292 ofile <<
"unique index of the fittedStar" << separator <<
"refStar contribution to Chi2 (1 dof)" 293 << separator <<
"number of measurements of this FittedStar" <<
std::endl;
297 for (
auto const &fittedStar : fittedStarList) {
298 const RefStar *refStar = fittedStar->getRefStar();
299 if (refStar ==
nullptr)
continue;
304 ofile << fittedStar->x << separator << fittedStar->y << separator;
305 ofile << fittedStar->getMag() << separator << fittedStar->color << separator;
307 ofile << fittedStar->getFlux() << separator << fittedStar->getFluxErr() << separator;
308 ofile << fittedStar->getIndexInMatrix() << separator << chi2 << separator
309 << fittedStar->getMeasurementCount() <<
std::endl;
Objects used as position anchors, typically USNO stars.
double getFluxErr(size_t filter) const
reference fluxErr in a given filter
void saveChi2RefContributions(std::string const &baseName) const override
Save a CSV file containing residuals of reference terms.
A list of MeasuredStar. They are usually filled in Associations::AddImage.
void offsetParams(Eigen::VectorXd const &delta) override
Offset the parameters by the requested quantities.
#define LOGLS_DEBUG(logger, message)
Class for a simple mapping implementing a generic Gtransfo.
A list of FittedStar s. Such a list is typically constructed by Associations.
std::shared_ptr< Associations > _associations
#define LOGLS_INFO(logger, message)
void assignIndices(std::string const &whatToFit) override
Set parameters to fit and assign indices in the big matrix.
#define LSST_EXCEPT(type,...)
double getFlux(size_t filter) const
reference flux in a given filter
std::list< std::shared_ptr< CcdImage > > CcdImageList
T setprecision(T... args)
void saveChi2MeasContributions(std::string const &baseName) const override
Save a CSV file containing residuals of measurement terms.