.. _Data-Products-dp0-1-schema-obj-tm-principal:

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Principal Columns for Object and Truth Match Catalogs
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The following two images show the principal columns of the DC2 Objects and Truth Match tables, as seen in the Table View of the Portal Aspect of the Rubin Science Platform.
Learn more in this :ref:`Data-Access-Analysis-Tools-Portal-Intro`. 

.. _Data-Products-dp0-1-schema-obj-tm-principal-obj:

Objects: Principal Columns
==========================

.. figure:: /_static/objects_principal_columns.png
    :name: objects_principal_columns
    
    Although only the g-band column name and description are shown for ``cModelFlux_flag_g``, ``mag_g_cModel``, ``magerr_g_cModel``, and ``snr_g_cModel`` in this image, the principal columns include these four parameters for all six filters.

.. _Data-Products-dp0-1-schema-obj-tm-principal-tm:

Truth Match: Principal Columns
==============================

.. figure:: /_static/truthmatch_principal_columns.png
    :name: objects_truthmatch_principal_columns
    
    Although only the g-band column name and description are shown for ``flux_g`` in this image, the principal columns include this parameters for all six filters. However, the Truth Match Catalog only includes ``mag_r``.