Usage of frames
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Convert an optical velocity into different optical and radio frames (LSRK, TOPO).
Written by Remy Indebetouw. See
this GBT page for a description of the various frames.
Usage:
au.frames(velocity=286.7, datestring='2005/11/01/00:00:00', ra='05:35:28.105', dec='-069.16.10.99', equinox='J2000', observatory='ALMA', prec=4)
Converts an optical velocity into barycentric, LSRK and TOPO frames.
-Remy Indebetouw
velocity: in km/s
datestring: "YYYY/MM/DD/HH:MM:SS"
ra: "05:35:28.105"
dec: "-069.16.10.99"
equinox: "J2000"
observatory: "ALMA"
prec: precision to display (digits to the right of the decimal point)
Example:
CASA <4>: au.frames(velocity=286.7,datestring='2005/11/01/00:00:00',equinox='J2000',ra='05:35:28.105', dec='-69.16.10.00', observatory='ALMA')
optical Doppler vel = 286.7000 km/s
optical BARY velocity = 286562.9104m/s
radio LSRK velocity = 271125.2389m/s
radio LSRK doppshift = 271002.7500m/s
radio TOPO velocity = 288283.0487m/s
radio TOPO doppshift = 288144.5741m/s
--
ToddHunter - 2012-09-24