SYSTEM: -V1.2: February 2003
NUMBER: 519 MODULE: spectool SYSTEM: -V1.2: February 2003 DATE: Wed Feb 19 12:28:59 MST 2003 FROM: valdes BUG: This is not exactly a bug but a limitation. The Voigt profile fitting requires a minimum value for the width parameters to avoid numerical problems. The limit is the value, in the current dispersion units, corresponding 3.3% of a pixel. Attempting to set the value any smaller, say with fitting of the parameter turned off, will still result in a returned value corresponding to the minumum. If you want one of the values to be zero then the profile type should be set to Gaussian or Lorentzian. If you want a fixed value smaller than the minimum the only workaround is to resample the spectrum to finer pixels. STATUS: A smaller minimum could be put into the code but there will always be some point and so no changed is currently planned.