dp02_dc2_catalogs

Data Preview 0.2 contains the image and catalog products of the Rubin Science Pipelines v23 processing of the DESC Data Challenge 2 simulation, which covered 300 square degrees of the wide-fast-deep LSST survey region over 5 years.

Tables

name	description	columns
Object	Properties of the astronomical objects detected and measured on the deep coadded images.	991
Source	Properties of detections on the single-epoch visit images, performed independently of the Object detections on coadded images.	144
ForcedSource	Forced-photometry measurements on individual single-epoch visit images and difference images, based on and linked to the entries in the Object table. Point-source PSF photometry is performed, based on coordinates from a reference band chosen for each Object and reported in the Object.refBand column.	39
DiaObject	Properties of time-varying astronomical objects based on association of data from one or more spatially-related DiaSource detections on individual single-epoch difference images.	138
DiaSource	Properties of transient-object detections on the single-epoch difference images.	67
ForcedSourceOnDiaObject	Point-source forced-photometry measurements on individual single-epoch visit images and difference images, based on and linked to the entries in the DiaObject table.	36
Visit	Metadata about the pointings of the DC2 simulated survey, largely associated with the boresight of the entire focal plane.	15
CcdVisit	Metadata about the 189 individual CCD images for each Visit in the DC2 simulated survey.	30
CoaddPatches	Static information about the subset of tracts and patches from the standard LSST skymap that apply to coadds in these catalogs	5
MatchesTruth	Match information for TruthSummary objects.	8
TruthSummary	Summary properties of objects from the DESC DC2 truth catalog, as described in arXiv:2101.04855. Includes the noiseless astrometric and photometric parameters.	24
ObsCore	Observation metadata in the ObsTAP relational realization of the IVOA ObsCore data model	37

Relationships

erDiagram
  t0["Object"] {
    objectId long PK
  }
  t1["Source"] {
    sourceId long PK
    ccdVisitId long FK
  }
  t2["ForcedSource"] {
    forcedSourceId long PK
    objectId long FK
    ccdVisitId long FK
  }
  t3["DiaObject"] {
    diaObjectId long PK
  }
  t4["DiaSource"] {
    ccdVisitId long FK
    diaObjectId long FK
    diaSourceId long PK
  }
  t5["ForcedSourceOnDiaObject"] {
    diaObjectId long FK
    forcedSourceOnDiaObjectId long PK
  }
  t6["Visit"] {
    visit long PK
  }
  t7["CcdVisit"] {
    ccdVisitId long PK
    visitId long FK
  }
  t8["MatchesTruth"] {
    match_objectId long FK
    id_truth_type char FK
  }
  t9["TruthSummary"] {
    id_truth_type char PK
  }
  t1 }o--|| t7 : "CcdV_Src"
  t2 }o--|| t0 : "Obj_FS"
  t2 }o--|| t7 : "CcdV_FS"
  t4 }o--|| t3 : "DiaO_DiaS"
  t4 }o--|| t7 : "CcdV_DiaS"
  t5 }o--|| t3 : "DiaO_FSoDiaO"
  t7 }o--|| t6 : "Visit_CcdV"
  t8 }o--|| t0 : "Obj_MatTru"
  t8 }o--|| t9 : "Tru_MatTru"