Open low-sky opened 9 years ago
I believe the following are supported by AST (copied from AST documentation):
Hi All,
Can you remind me which systems we are currently supporting?
I always get confused between ICRS and FK5.
Sincerely,
Greg
Gregory R. Sivakoff Assistant Professor of Physics University of Alberta, Edmonton, AB sivakoff@ualberta.ca
On 2015-06-17 1:58 PM, Pavol Federl wrote:
I believe the following are supported by AST (copied from AST documentation):
- "AZEL": Horizon coordinates
- "ECLIPTIC": Ecliptic coordinates (IAU 1980)
- "FK4": The old FK4 (barycentric) equatorial coordinate system
- "FK4-NO-E" or "FK4_NO_E": The old FK4 (barycentric) equatorial system
- "FK5" or "EQUATORIAL": The modern FK5 (barycentric) equatorial coordinate sys- tem
- "GALACTIC": Galactic coordinates (IAU 1958)
- "GAPPT", "GEOCENTRIC" or "APPARENT"
- "HELIOECLIPTIC": Ecliptic coordinates (IAU 1980)
- "ICRS": The Internation Celestial Reference System
- "J2000": An equatorial coordinate system based on the mean dynamical equator and equinox of the J2000 epoch
- "SUPERGALACTIC": De Vaucouleurs Supergalactic coordinates
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No, I'm sorry I don't know how much supergalactic. Perhaps Jeff would know or could refer you to someone who does. Susan
On 06/17/2015 01:47 PM, Erik Rosolowsky wrote:
@pfederl https://github.com/pfederl -- Does ASTlib support a supergalactic reference frame on top of J2000, B1950, Ecliptic etc. It's a supported frame in CASA viewer and we should include it if it's already in ASTlib.
@slovelan https://github.com/slovelan -- Do you know if supergalactic is actually used much by the casaviewer community?
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All right, let's go with the following in order
The "NATIVE" uses the system of the file. It may not be the system given here but ASTlib may happily parse it and give grids. Would that work?
I think if someone wants non-standard equinox for FK5 then they can write a plugin!
@pfederl -- Does ASTlib support a supergalactic reference frame on top of J2000, B1950, Ecliptic etc. It's a supported frame in CASA viewer and we should include it if it's already in ASTlib.
@slovelan -- Do you know if supergalactic is actually used much by the casaviewer community?