[mmaimcal] Some thoughts on ALMA calibrator sources

[Al Wootten]

Hi folks

It is a good time to consider this subject again.

As we discussed at the Dec 09 Sci IPT meeting the SPT survey sources 
presented in:
http://arxiv.org/abs/0912.2338
support the predictions made in the numerous ALMA memos on the subject. 
  The area surveyed was very limited but of course this is a dynamic 
field with Planck and the SPT still exploring.

I think sourceCatalog.py is a derivative of SMA and other catalogs but 
ALMA is reaching the point where it can contribute usefully to compendia.

There was a plan at some point for a comprehensive EVLA/VLB/ALMA catalog 
but I do not know where that stands or whether ALMA needs an independent 
initiative.  Temporal measurements are critical--certain SBs run in 
March used calibrators which had worked well for the SMA but whose flux 
had faded to uselessness even for the more sensitive ALMA 3-antenna array.

Clear skies,
Al

Harvey Liszt wrote:
> Something to keep boredom at bay. Attached.
> 
> H
> 
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