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The bandpass calculation uses a standard sensitivity equation where the time required to achieve a particular antenna-based SNR for a source flux of
can be written as
 |
(7.1) |
where the remaining parameters have their usual meanings (see ALMA Sensitivity Calculator chapter of the ALMA Technical Handbook). The OT currently assumes that a SNR of 100 is required and that the typical source fluxes will be 10 Jy at bands 6 and below, and 100 Jy for bands 7 and above. It is also assumed that the bandpass created during data reduction will be smoothed by 20 channels i.e. 20 times the native correlator channel width is used.
The ALMA OT Team, 2014 May 21