Can help to remove bowls around sources AST.ZERO_SNR_LOW
"
ast.zero_snr_fwhm"
. If it is negative, the value is taken as
the max smoothed value of a blob containing "
ast.zero_snr_low"
pixels. Thus a value of "
-1.1"
will
cut at a height just sufficient to remove blobs of a single pixel form the mask. A value of "
-2.1"
would
remove blobs of two pixels form the mask, etc. [-1.1]