VOEvent 1.1 new draft with STC elaboration

[Arnold Rots]

Silvia and I had a chat, this evening, and here is the suggestion for
the list of solar-related coordinate systems in STC (F&H: Fraenz &
Harper, T: Thompson):

  MAG	 Geomagnetic (F&H)
  GSE	 Geocentric Solar Ecliptic (F&H)
  GSM	 Geocentric Solar Magnetic (F&H)
  SM	 Solar Magnetic (F&H)
  HGC	 Heliographic-Carrington (T)
  HEEQ	 Heliocentric Earth Equatorial (F&H)
  HRTN	 Heliocentric Radial-Tangential-Normal (F&H)
  HPC	 Helioprojective Cartesian (T)
  HCC	 Heliocentric Cartesian (T)
  HGI	 Heliographic Inertial (F&H)

For VOEvent I suggest that we add as standard systems:

    UTC-HPC-TOPO
    UTC-HGC-TOPO

  - Arnold


Arnold Rots wrote:
> I have been talking with Ed DeLuca here, who is working on Solar-B,
> and this has exposed some problems that should be addressed soon.
> The solar coordinate systems in STC were largely based on Fraenz &
> Harper, including some of the Hapgood systems: HEE, HEEQ, HCI, and
> HCD, in addition to a generic Heliographic.
> But then there is Bill Thompson's FITS WCS paper on solar coordinate
> systems which, in general, tends to put the z axis along the
> observer-sun line (as opposed to the x axis in F&H).  It also became
> clear that helioprojective coordinates may need to be represented.
> 
> I'd like the solar community to tell us whether there is a consensus:
> should I go with the Thompson systems?  are these the ones that are
> most commonly used?
> Or are we seeing here a bifurcation between solar and planetary types,
> with the former's customs represented by Thompson, the latter's by F&H?
> What coordinate frames would solar and planetary people really like to see?
> 
> 
> Thanks,
> 
>   - Arnold
> 
> 
> Elizabeth Auden wrote:
> > >> Elizabeth Auden (MSSL/AstroGrid) and myself have an interest in VOEvent
> > >> applied to solar events. I will be at the IVOA interop meeting next week.
> > >
> > > And Frank Hill spoke on solar transients at VOEvent II (http:// 
> > > www.ivoa.net/twiki/bin/view/IVOA/VoeventWorkshop2).
> > 
> > I followed up with Frank Hill and Neal Hurlburt about solar VOEvents this 
> > past February at an SDO workshop. They're both interested in developing 
> > solar VOEvents as well, and Neal in particular is working on a VOEvent 
> > packet for Solar-B data.
> > 
> > Elizabeth
> > 
> > -- 
> > Elizabeth Auden, MSSL
> > Holmbury St. Mary, Dorking RH5 6NT
> > Tel: +44 (0)1483 204 276
> > eSDO Technical Lead, AstroGrid Developer
> > 
> --------------------------------------------------------------------------
> Arnold H. Rots                                Chandra X-ray Science Center
> Smithsonian Astrophysical Observatory                tel:  +1 617 496 7701
> 60 Garden Street, MS 67                              fax:  +1 617 495 7356
> Cambridge, MA 02138                             arots at head.cfa.harvard.edu
> USA                                     http://hea-www.harvard.edu/~arots/
> --------------------------------------------------------------------------
> 
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Arnold H. Rots                                Chandra X-ray Science Center
Smithsonian Astrophysical Observatory                tel:  +1 617 496 7701
60 Garden Street, MS 67                              fax:  +1 617 495 7356
Cambridge, MA 02138                             arots at head.cfa.harvard.edu
USA                                     http://hea-www.harvard.edu/~arots/
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