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IRAM Memo 2011-4
Handling the spectral axis in CLASS

J. Pety$^{1,2}$ & S. Bardeau$^1$

January 8 $^\ensuremath{\mathrm{th}}$, 2015
Version 1.1
(Version 1.0 released on October 20 $^\ensuremath{\mathrm{th}}$, 2011)

1. IRAM (Grenoble)

Abstract:

An observer is interested by the physical properties (line frequencies, velocity of the gas) of a source in its own reference frame. However, the observations happen in a different frame, namely the topocentric frame for ground-based observations. This implies a change of frame to infer the physical properties in the source frame from the measured frequencies in the measurement frame. Several difficulties arise in astronomy: 1) the Earth ... To be completed.





Gildas manager 2015-03-19