LSRKfreq_to_chan

auto_selfcal.selfcal_helpers.LSRKfreq_to_chan(msfile, field, spw, LSRKfreq, spwsarray, minmaxchans=False)

Identifies the channel(s) corresponding to input LSRK frequencies. Useful for choosing which channels to split out or flag if a line has been identified by the pipeline.

Parameters:

msfile: Name of measurement set (string)

spw: Spectral window number (int)

obsid: Observation ID corresponding to the selected spectral window

restfreq: Rest frequency in Hz (float)

LSRKvelocity: input velocity in LSRK frame in km/s (float or array of floats)

Returns:

Channel number most closely corresponding to input LSRK frequency.