InterOpMay2004DALNotes < IVOA

IVOA Web>IvoaEvents>InterOpMay2004>InterOpMay2004DAL>InterOpMay2004DALNotes (2004-05-25, MartinHill) (raw view)

---+ Presentation Notes

Notes by MCH on Jonathon <noop>MacDowell's presentation

---++ SED Model:

This is a pre-Observation model so we can get on with SSA before the Observation model is ready.  We need to make sure it converges with Observation rather than diverges as they develop.

---+++ Accuracy

To be expanded later. A placeholder for now.

For the <noop>SEDCoord, need pixellation, resolution and error (incl limits and systematic errors).  Probably need to combine Flux Accuracy with <noop>SpectralCoord Accuracy (? If I have this right).  Resolution is going to be complicated.

---+++ Quality 

   * For now, 0=good, 1-2=Something else 
   * To be set by data provider
   * Extend later  

---+++ Flux

(also includes background now)

Some 'brightness' types are not intended to be modelled; it's up to the data provider to provide some flux value (or a johnson magnitude or similarly convertable type) with appropriate accuracy.

_[MCH: Could <noop>DataID be represented by VOResource?]_

---+++ Corrections & Processes applied

Requests for some 'history' record of what processes have been applied in what order.

_[MCH: Perhaps add a set of 'history' objects, eg De-Reddening. Needs to be applied to Flux, Coordinates and perhaps overall.]_

-- IVOA.MartinHill - 25 May 2004

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Topic revision: r1 - 2004-05-25 - MartinHill

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