Thursday, May 23, 2013

5-22 notes on diffmap





For some blazar sources, there are extended features that need to be taken care of in order to move forward with the fit (features that aren't necessarily in the image on the Blazar website). Refer to the MOJAVE website to look for these.

Sometimes, to get larger features, use uv taper (this de weights some of the longer/shorter baselines to give you a lower resolution in order to bring out some of the larger scale features). Clean tends to break up larger scale features, so that they can appear choppy. If you use UV taper, they will appear as a single bright source. Refer to the diffmap manual every couple image processings (to catch things you haven't caught before and refresh memory).

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