Time series data in VOEvent

Frederic V. Hessman hessman at Astro.physik.Uni-Goettingen.de
Tue Jun 12 07:22:43 PDT 2007


On 12 Jun 2007, at 3:49 pm, Steve Allen wrote:

> On Tue 2007-06-12T11:24:58 +0200, Frederic V. Hessman hath writ:
>> Unfortuately, UCD1+ doesn't (yet) have "time.julian" or
>> "heliocentric" atoms
>
> UCD1+ has time.scale

time.scale = "timescale", i.e. the temporal scale of something, and  
not a time system.

> Please don't use adjectives "heliocentric" or HJD anymore.
> Everything IAU-approved is currently "barycentric".

It may be "IAU-approved", but "barycentric" is not unambiguous: a  
"barycenter" is simply w.r.t. SOME (but not any particular) center-of- 
mass, so if you want the Solar System we'll have to come up with  
something like

	ucd="time.julian;time.barycentric;SolarSystem"

(note that NONE of these are UCD1+).   The IAU may not used "HJD"  
anymore, but I know zillions of astronomers who do ;-)

Rick


------------------------------------------------------------------------ 
------------------------
Dr. Frederic V. Hessman     Hessman at Astro.physik.Uni-Goettingen.DE
Institut für Astrophysik          Tel.  +49-551-39-5052
Friedrich-Hund-Platz 1         Fax +49-551-39-5043
37077 Goettingen                 Room F04-133
http://www.Astro.physik.Uni-Goettingen.de/~hessman
------------------------------------------------------------------------ 
-------------------------
MONET: a MOnitoring NEtwork of Telescopes
http://monet.Uni-Goettingen.de
------------------------------------------------------------------------ 
-------------------------


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.ivoa.net/pipermail/voevent/attachments/20070612/670166f6/attachment-0003.html>


More information about the voevent mailing list