VOEvent 1.1 new draft with STC elaboration

[Arnold Rots]

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
> 
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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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