ALMA-IMF Telecon March 13, 2019

Minutes for ALMA-IMF telecon, March 13, 2019
Agenda: https://github.com/ALMA-IMF/reduction/wiki/ALMA-IMF-Data-Reduction-Telecon,-March-13,-2019 

http://desktop.visio.renater.fr/scopia?ID=722288***2252&autojoin


Attendees: Adam Ginsburg, Roberto Galván,Hongli Liu, Patricio Sanhueza, Nichol Cunningham, Jonathan Braine, Fernando Olguin, Brian Svoboda, Thomas Nony



Imaging results:

• Roberto: G333 some problems with antenna list for ‘best sensitivity image’.  (continuum_imaging_template_3sigma.py, bsens images).  Needs corrections.
  
  

• We may want to spcetrally average the “best sensitivity” data to speed up continuum imaging
  
  
• Adam: https://github.com/ALMA-IMF/notebooks/blob/master/W51_B6_quicklooks.ipynb 
  
  • Automultithresh is probably not a good options
    
• Liu Hongli:
  
• B3 7M+12M combination (what field?):
  
  

B6: only 12M.  sidelobethreshold=2, noisethreshold=4.25 (from casaguide).  negativethreshold=1000

Discussion of imaging parameter saving:
https://github.com/ALMA-IMF/reduction/pull/10/files


Masking and thresholding discussion:

• Patricio: prefer interactive because you can mask regions, force flux to a small sub-region, then once sidelobes are removed, expand the mask
  
• Experiment to-do: try re-cleaning an image using the final mask
  
• Roberto: maybe, if one could save in the viewer in interactive cleaning the mask that one uses in each cycle, one could save the masks and together with the info of the niter one could put that in a script 
  

This is what I used for line cleaning, some kind of auto-masking tclean. It worked quite well in IRDCs.
http://adsabs.harvard.edu/abs/2018ApJ...861...14C
(see also https://home.strw.leidenuniv.nl/~ycontreras/yclean.html -> https://home.strw.leidenuniv.nl/~ycontreras/yclean.py )