To test the response of the map-maker to different known astronomical sources, an external " fakemap" can be specified to provide an image of the sky that will produce additional astronomical signal to the time series. A rectangular region is first extracted from the supplied fake map with pixel bounds equal to those of the main output map. The WCS within this extracted region must match that of the main output map (i.e. each pixel must have the same sky coordinates in both maps). A typical procedure may involve: (i) produce a map with makemap; (ii) produce an image with simulated data with the same pixel dimensions and WCS; (iii) specify this new map for the " fakemap" parameter below. [$<$undef$>$]

MAKEMAP, CALCQU