UseCase: CatalogueCrossMatch

PrimaryActor:

astronomer

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EndResult:

sources identified as matching known objects

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OtherActors:

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PreConditions:

1. new catalogue of target sources
2. larger reference catalogue, e.g. USNO-A2

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FlowOfEvents:

This requires a so-called "fuzzy join" on overlap of error boxes on the sky, together with work to estimate the false-alarm rates for different classes of objects e.g. using Bayesian probabilities.

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PostCondition:

type here

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BasicAssumptions:

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AlternativeFlows:

type here

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Discussion:

type here

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Links to ScienceProblems:

Delmotte et al (2001) describe the cross matching of sources from the DENIS and 2MASS survey's for objects in the Magellanic clouds. Basically I band data from DENIS is added to the JH and Ks data from 2MASS ( the J band data in DENIS is of similar depth to that of 2MASS).

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KeyReferences:

Delmotte et al, 2001, SPIE, 4477, 301, 'Cross-matching DENIS and 2MASS point sources towards the Magellanic Clouds', astro-ph/0109293

Scharf, 2001, Virtual Observatories of the Future, ASP Conference Proceedings, Vol. 225. Edited by Robert J. Brunner, S. George Djorgovski, and Alex S. Szalay. PASP, p.86, 'The WARPS Galaxy Cluster Survey: A Case Study Using Present-Day Multi-Wavelength Archives'.

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GoodStyle: Please add comments below. This area should be used for refinement of the above document. If you want to ask questions or start a dialogue with the author, please use (or create) a topic in the Use Cases Forum.
Author: Once the refinements here and comments in the forum die down, perhaps you could rewrite the problem, incorporating the comments and refinements.

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-- NicholasWalton - 15 Apr 2002