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Computes the edge of a mosaic pointing pattern. It supports both the old-style (Cycle 0-3) and new-style (Cycle 4+) formats of the ALMA OT output file.
Usage:
tt.outermosaic(pointings, radius, showplot=False)
Inputs:
pointings: an ASCII file output by the ALMA OT: format = "J2000 HHhMMmSS.Ss DDdMMmSS.Ss"
radius: beam radius to trace (in arcsec)
Returns:
list of marker positions suitable for aplpy's show_markers function
Example with aplpy plotting
x,y = tt.outerMosaic('ngc6334i.pointings', 14.7) # 40% point at 227 GHz
ff.show_markers(x,y,facecolor='k',edgecolor='k')