High Z Quasars SD

Introduction

An astronomer wishes to investigate the epoch of ionisation in the universe. As a pragmatic first step, this intrepid researcher wants to discover new high redshift quasars with 5 < z < 10.

Flow of Events

First, the physicist searches the resource catalogue for all catalogues optical, near IR, or x-ray data with area information. A list of catalogues is returned, and the physicist selects two or more catalogues in different wavelengths to join on some inequality. The smaller catalogue(s) is joined with the larger catalogue and a result list is returned to the astronomer.

Sequence Diagram

UseCases:

These use cases are the ones that will be needed to deliver this case.

1. AuthenticateIdentity
2. PerformRegistrySearch
3. NegotiateAccessToResource
   • AuthenticateIdentity
   • DetermineAuthority
4. PerformCatalogueSearch
5. MySpaceStoreResults
   • NegotiateAccessToResource
     • AuthenticateIdentity
     • DetermineAuthority
6. ComplexQuery
   • NegotiateAccessToJob
7. MySpacePublishDerivedData
8. ResultMerge
   • MySpaceStoreResults

-- ElizabethAuden - 07 Jun 2002