VOEvent 1.1 new draft with STC elaboration
Arnold Rots
arots at head.cfa.harvard.edu
Tue May 16 10:30:07 PDT 2006
Correction:
Assuming that times will typically be corrected for pathlength delay
(please speak up if that is not the plan), times will be Heliocentric,
while some of the solar spatial systems are intrinsically
heliocentric, others topocentric.
I suggest the following standard systems:
UTC-HPC-TOPO
Describes raw observational data
UTC-HELIO-HPC-TOPO
For time-corrected observational data
UTC-HGC-HELIO
Suitable for reporting solar events
The following seem useful:
UTC-HELIO-HEEQ-TOPO
UTC-HELIO-HCC-TOPO
Are there any among these that you don't expect to be used at all?
Are there any among these that you don't expect to be used in VOEvent?
Are there others that you expect to be used?
Thanks,
- Arnold
Arnold Rots wrote:
> 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
>
>
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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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