From amsr at jb.man.ac.uk Fri Feb 7 11:09:26 2003 From: amsr at jb.man.ac.uk (Anita Richards) Date: Fri, 7 Feb 2003 19:09:26 +0000 (GMT) Subject: initiate discussion Message-ID: The main reference point for this is of course CDS http://cdsweb.u-strasbg.fr/doc/UCD.htx but you can find some AstroGrid documents on UCDs http://wiki.astrogrid.org/bin/view/Astrogrid/OntologyDocs One obvious starting point is what we have learnt from the AVO First Light Demo. My first thought is that it is very useful when you can answer a query by a partial UCD, e.g. plotting anything with a REDSHIFT whether it is REDSHIFT_PHOT or REDSHIFT_HC etc; or PHOT_*_V where * can be JHN or COUS or MAG or .... (e.g. in Aladin, for filters or for the SED tool..) However you also need to be able to track how much uncertainty you are introducing (as well as using the more exact UCD if you want of course) - e.g. any old PHOT_MAG_V might do as part of a radio-to-x-ray SED but not for fine inter-optical comparisons. So any restructuring of UCDs should take this into account. cheers Anita - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Dr. Anita M. S. Richards, AVO Astronomer MERLIN/VLBI National Facility, University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL, U.K. tel +44 (0)1477 572683 (direct); 571321 (switchboard); 571618 (fax). From derriere at newb6.u-strasbg.fr Thu Feb 20 14:00:29 2003 From: derriere at newb6.u-strasbg.fr (Sebastien Derriere) Date: Thu, 20 Feb 2003 23:00:29 +0100 Subject: UCDs status and perspectives Message-ID: <3E554FFD.6BD3BD89@astro.u-strasbg.fr> Hello, I have tried to summarize in a short document the current status of UCDs, and the various suggestions that have been made concerning their possible extension, evolution, refactoring, ... I don't draw any conclusion at the end of this short paper. I just tried to collect the various informations available here and there, and put them together. The goal is to stimulate discussions! Best regards, Sebastien. -- _______ / ~ /, Sebastien Derriere mailto:derriere at astro.u-strasbg.fr / ~~~~ // Observatoire de Strasbourg Phone +33 (0) 390 242 444 /______// 11, rue de l'universite Telefax +33 (0) 390 242 417 (______(/ F-67000 Strasbourg France -------------- next part -------------- A non-text attachment was scrubbed... Name: UCD-status0203.pdf Type: application/pdf Size: 103536 bytes Desc: not available URL: From amsr at jb.man.ac.uk Fri Feb 7 11:09:26 2003 From: amsr at jb.man.ac.uk (Anita Richards) Date: Fri, 7 Feb 2003 19:09:26 +0000 (GMT) Subject: initiate discussion Message-ID: The main reference point for this is of course CDS http://cdsweb.u-strasbg.fr/doc/UCD.htx but you can find some AstroGrid documents on UCDs http://wiki.astrogrid.org/bin/view/Astrogrid/OntologyDocs One obvious starting point is what we have learnt from the AVO First Light Demo. My first thought is that it is very useful when you can answer a query by a partial UCD, e.g. plotting anything with a REDSHIFT whether it is REDSHIFT_PHOT or REDSHIFT_HC etc; or PHOT_*_V where * can be JHN or COUS or MAG or .... (e.g. in Aladin, for filters or for the SED tool..) However you also need to be able to track how much uncertainty you are introducing (as well as using the more exact UCD if you want of course) - e.g. any old PHOT_MAG_V might do as part of a radio-to-x-ray SED but not for fine inter-optical comparisons. So any restructuring of UCDs should take this into account. cheers Anita - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Dr. Anita M. S. Richards, AVO Astronomer MERLIN/VLBI National Facility, University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL, U.K. tel +44 (0)1477 572683 (direct); 571321 (switchboard); 571618 (fax). From derriere at newb6.u-strasbg.fr Thu Feb 20 14:00:29 2003 From: derriere at newb6.u-strasbg.fr (Sebastien Derriere) Date: Thu, 20 Feb 2003 23:00:29 +0100 Subject: UCDs status and perspectives Message-ID: <3E554FFD.6BD3BD89@astro.u-strasbg.fr> Hello, I have tried to summarize in a short document the current status of UCDs, and the various suggestions that have been made concerning their possible extension, evolution, refactoring, ... I don't draw any conclusion at the end of this short paper. I just tried to collect the various informations available here and there, and put them together. The goal is to stimulate discussions! Best regards, Sebastien. -- _______ / ~ /, Sebastien Derriere mailto:derriere at astro.u-strasbg.fr / ~~~~ // Observatoire de Strasbourg Phone +33 (0) 390 242 444 /______// 11, rue de l'universite Telefax +33 (0) 390 242 417 (______(/ F-67000 Strasbourg France -------------- next part -------------- A non-text attachment was scrubbed... Name: UCD-status0203.pdf Type: application/pdf Size: 103536 bytes Desc: not available URL: