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IVOA Documents

IVOA Photometry Data Model
Version 1.0

IVOA Proposed Recommendation 12 August 2013

Interest/Working Group:
Jesus Salgado Carlos Rodrigo Pedro Osuna Mark Allen Mireille Louys Jonathan McDowell Deborah Baines Jesus Maiz Apellaniz Evanthia Hatziminaoglou Sebastien Derriere Gerard Lemson
Jesus Salgado Pedro Osuna


The Photometry Data Model (PhotDM) standard describes photometry filters, photometric systems, magnitude systems, zero points and its interrelation with the other IVOA data models through a simple data model. Particular attention is given necessarily to optical photometry where specifications of magnitude systems and photometric zero points are required to convert photometric measurements into physical flux density units. PhotDM is related to other IVOA Data models (Spectrum DM, Characterization DM, Observation and Provenance DM), and is intended to provide photometry metadata for data that would be accessed via the IVOA Data Access Protocols such as SSAP (Simple Spectra Access Protocol) or TAP (Table Access Protocol). As with most of the VO Data Models, PhotDM makes use of STC, Utypes, Units and UCDs. PhotDM will be serializable with a VOTable.

Status of this document

This is an IVOA Proposed Recommendation made available for public review.
It is appropriate to reference this document only as a recommended standard that is under review and which may be changed before it is accepted as a full recommendation.

Available formats: PDF, DOC

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