Distance to Possible Calibration Sources as a Function of Frequency for ALMA


The assumption that so-called “fast switching” calibration will always be done by observing a calibrator at 90 GHz is examined. It is found that it may be better to observe the calibrator at the same frequency as the target, since suitable calibration sources may be just as close at higher frequencies as they are at 90 GHz (all roughly 1 for continuum… (More)


2 Figures and Tables