Quoting Jonathan McDowell :
> Rick Hessman proposed a number of UCDs (May 30) and I wanted to
> comment on them.
> One was
> spect.cont spectral continuum
> I endorse adding this, it's very useful for my own data.
If you mean that spect.cont is a sort of flux per unit something, than it'll be better to wait for a revision of the fluxDensity word
> So here's my proposal for Rick's list, in which proposed new UCDs
> are marked by a * (sort of the paleolinguistics convention of
> marking hypothetical word forms with a *).
>
> Rick Jonathan
> phys.grav-wave/em.grav-wave *phys.wave.gravitational
> phys.particle.neutrino/em.neutrino *phys.particle.neutrino
> instr.calib *obs.calib [Calibration observation]
Yes, we could introduce the three sub-trees:
S | phys.wave.* S | phys.particle.* (starting for the already present electron) S | obs.calib(.*)
A few comments on the following list:
> phot.calib obs.image;*obs.calib;phot.flux
> [It's an image; it's for calibration; what are we calibrating - flux.]
> spect;*obs.calib;phot.flux
> [or, it's a spectrum...]
> obs.calib.dome-flat
> obs.image;obs.calib;*instr.det.flat;*instr.tel.dome
> [We're calibrating the flatness of the detector; we're using
> the dome to do it]
> obs.calib.flux obs.image;*obs.calib;phot.flux
> obs.calib.freq spect;*obs.calib;em.freq
> [It's a spectrum; it's for calibration; we're calibrating freq]
> obs.calib.guide-star meta.id;*obs.calib;*pos.astrometry
> [If this is the name of the guide star used..]
> obs.calib.phot [What's the difference with obs.calib.flux?]
> obs.calib.pos obs.image;*obs.calib;*pos.astrometry (?)
> obs.calib.sky-flat obs.image;obs.calib;*instr.det.flat
> obs.calib.slit-mask *instr.spect.slit
> obs.calib.spect spect;*obs.calib;em.wl
> [If you mean by this an arc spectrum; what diff from obs.calib.wl?]
> obs.calib.veloc spect;*obs.calib;src.veloc
> obs.calib.wl spect;*obs.calib;em.wl
> phot.calib.flux [same as obs.calib.flux?]
> phot.calib.mag *obs.calib;em.opt.B (etc.)
> pos.calib *obs.calib;pos
> spect.calib spect;*obs.calib
> spect.calib.wl spect;*obs.calib;em.wl
> spect.calib.freq spect;*obs.calib;em.freq
The same for Rick's suggestions:
instr/tel;optics.focallength ==> optics.focallength;instr/tel
2. We have to maintain UCD-words, not UCDs
3. Saying: [It's an image; it's for calibration; what are we calibrating -
flux.] means that you are probably describing a detaset, so an alternative
description could be: [name (or url, or ...) of an image used for
flux-calibrating other images of raw data]
that could translate into :
meta.id;obs.image;obs.calib
We probably need a deeper discussion before introducing new trees. I agree with Jonathan: let's move quickly from WD to PR, and continue at the same time the discussion on new words, object types, events, etc...
Andrea
Andrea Preite Martinez andrea-at-rm.iasf.cnr.it Istituto di Astrofisica Spaziale Tel.:+39.06.4993.4641 Area di Ricerca di Tor Vergata Fax.:+39.06.2066.0188 Via del Fosso del Cavaliere 100 Cell:+39.339.381735500133 Roma