Hi Deborah, I'm not seeing the distinction, only a situation where it might be one or more than one, but they're all Astronomical Objects to me. However, I am sure you will discuss this at Jacek's telecon today and hash out if there is a need for both.
Jeff > From: Deborah Levine <[EMAIL PROTECTED]> > Organization: IPAC/SSC > Reply-To: [EMAIL PROTECTED], LSST Data Management > <[email protected]> > Date: Thu, 30 Nov 2006 16:07:16 -0800 > To: LSST Data Management <[email protected]> > Subject: Re: [LSST-data] Notes from Database telecon Wed Nov 29 > > Well, the crux of the problem as I see it is that Object in the sense of > an Object Table in the schema is not the same animal as an Astronomical > Object. Quite. So it gets a bit confusing. Especially since that > mapping changes as knowledge changes. Astronomical Object is a > perfectly appropriate thing to call a Thing, but then we have to > constantly re-determine if an Astronomical Object and and Object are the > same thing (Thing) or not. Its nomenclature, but I've watched it get > tripped over several times. > > Jeffrey P Kantor wrote: >> I think our UML model calls a Thing an Astronomical Object...see the Domain >> Model:Catalogs:Astronomical Object classes... >> >> >>> From: Deborah Levine <[EMAIL PROTECTED]> >>> Organization: IPAC/SSC >>> Reply-To: [EMAIL PROTECTED], LSST Data Management >>> <[email protected]> >>> Date: Thu, 30 Nov 2006 13:57:35 -0800 >>> To: LSST Data Management <[email protected]> >>> Subject: Re: [LSST-data] Notes from Database telecon Wed Nov 29 >>> >>> Actually, to me, "detection" sounds like a single data point in one band >>> on one night.... If I were starting from >>> scratch, I'd try to find a nomenclature that has separate and not easily >>> confused words for each of these things: >>> >>> A single extractable flux from one filter at one observational epoch; a >>> single data point; a detection >>> All the extractable fluxes in all filters for one position for one >>> observational epoch; a visit >>> All the extractable fluxes in all filters which are believed to belong >>> to the same physical celestial entity; an "object"? >>> The actual physical celestial entity; a star, galaxy, solar system >>> object, etc. which is what I called Thing. Starting from scratch I >>> might call this an "object" or a "source" >>> >>> Kem Cook wrote: >>> >>>> I think we should use detection for Deborah's Thing. >>>> >>>> Kem >>>> >>>> >>>> >>>>> Hi All, >>>>> >>>>> >>>>>> --> Deborah will try to summarize what info related to >>>>>> confused/resolved objects will be readily needed >>>>>> from database from a scientist point of view >>>>>> >>>>>> >>>>> Deborah has so attempted, the result is attached! >>>>> >>>>> -- >>>>> --------------------------------------------------------------------- >>>>> Deborah Levine, Ph.D. (626)395-8567 (Office) >>>>> Operations Scientist (626)590-7500 (Mobile) >>>>> Spitzer Space Telescope Science Center (626)432-7484 (FAX) >>>>> Mail Code 314-6, Caltech [EMAIL PROTECTED] >>>>> Pasadena, CA 91125 >>>>> >>>>> "Make everything as simple as possible, but not simpler." >>>>> Albert Einstein >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> LSST-data mailing list >>>>> [email protected] >>>>> http://www.lsstmail.org/mailman/listinfo/lsst-data >>>>> >>>>> >>>>> >>>> _______________________________________________ >>>> LSST-data mailing list >>>> [email protected] >>>> http://www.lsstmail.org/mailman/listinfo/lsst-data >>>> >>>> >>>> >>> -- >>> --------------------------------------------------------------------- >>> Deborah Levine, Ph.D. (626)395-8567 (Office) >>> Operations Scientist (626)590-7500 (Mobile) >>> Spitzer Space Telescope Science Center (626)432-7484 (FAX) >>> Mail Code 314-6, Caltech [EMAIL PROTECTED] >>> Pasadena, CA 91125 >>> >>> "Make everything as simple as possible, but not simpler." >>> Albert Einstein >>> >>> >>> >>> _______________________________________________ >>> LSST-data mailing list >>> [email protected] >>> http://www.lsstmail.org/mailman/listinfo/lsst-data >>> >>> >> >> _______________________________________________ >> LSST-data mailing list >> [email protected] >> http://www.lsstmail.org/mailman/listinfo/lsst-data >> >> > > -- > --------------------------------------------------------------------- > Deborah Levine, Ph.D. (626)395-8567 (Office) > Operations Scientist (626)590-7500 (Mobile) > Spitzer Space Telescope Science Center (626)432-7484 (FAX) > Mail Code 314-6, Caltech [EMAIL PROTECTED] > Pasadena, CA 91125 > > "Make everything as simple as possible, but not simpler." > Albert Einstein > > > > _______________________________________________ > LSST-data mailing list > [email protected] > http://www.lsstmail.org/mailman/listinfo/lsst-data > _______________________________________________ LSST-data mailing list [email protected] http://www.lsstmail.org/mailman/listinfo/lsst-data
