Introduction to CASA and Basic Data Reduction Overview
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Introduction to CASA
and Basic Data
Reduction Overview
Steven T. Myers
CASA Project Scientist
(NRAO) Beta Release Status
CASA Status:
in Beta Release since October 2007
roughly quarterly “patches”
Current Release: Beta Release Patch 3
target release date October 15
general release
register at my.nrao.edu , no password for download
CASA Tutorial -- 7 October 2008
2 Beta Disclaimer
This really is a Beta Release!
still missing functionality
there are known failure modes
will find new problems
Improvements in upcoming patches
move towards handling ALMA/EVLA “use cases”
better handling of calibration
CASA Tutorial -- 7 October 2008
3 Curriculum
schedule:
~1 hour orientation lecture + demo (this talk)
hands-on data reduction with datasets:
VLA Continuum Polarization (3C129)
VLA Spectral Line (NGC2403)
BIMA 3mm line mosaic (NGC4826)
intended to be interactive
if you need help - ask!
CASA Tutorial -- 7 October 2008
4 Starting CASA
From your workstation (running RHEL):
type ‘casapy-test’ at prompt
this is the pre-release test version of Beta Patch 3 at AOC
quit CASA using ‘exit’
brings up IPython shell plus casalogger GUI
Other releases available for download
not yet built for Patch 3...
CASA Tutorial -- 7 October 2008
5 Getting User Support
First stop: Read the Manual!
CASA Home: http://casa.nrao.edu
Cookbook, and “help” within CASA
CASA Helpdesk & Support Cadres
“Helpdesk” under my.nrao.edu
submit Issues
User Support Specialists (Gustaaf at AOC)
CASA Tutorial -- 7 October ...
Voir
and Basic Data
Reduction Overview
Steven T. Myers
CASA Project Scientist
(NRAO) Beta Release Status
CASA Status:
in Beta Release since October 2007
roughly quarterly “patches”
Current Release: Beta Release Patch 3
target release date October 15
general release
register at my.nrao.edu , no password for download
CASA Tutorial -- 7 October 2008
2 Beta Disclaimer
This really is a Beta Release!
still missing functionality
there are known failure modes
will find new problems
Improvements in upcoming patches
move towards handling ALMA/EVLA “use cases”
better handling of calibration
CASA Tutorial -- 7 October 2008
3 Curriculum
schedule:
~1 hour orientation lecture + demo (this talk)
hands-on data reduction with datasets:
VLA Continuum Polarization (3C129)
VLA Spectral Line (NGC2403)
BIMA 3mm line mosaic (NGC4826)
intended to be interactive
if you need help - ask!
CASA Tutorial -- 7 October 2008
4 Starting CASA
From your workstation (running RHEL):
type ‘casapy-test’ at prompt
this is the pre-release test version of Beta Patch 3 at AOC
quit CASA using ‘exit’
brings up IPython shell plus casalogger GUI
Other releases available for download
not yet built for Patch 3...
CASA Tutorial -- 7 October 2008
5 Getting User Support
First stop: Read the Manual!
CASA Home: http://casa.nrao.edu
Cookbook, and “help” within CASA
CASA Helpdesk & Support Cadres
“Helpdesk” under my.nrao.edu
submit Issues
User Support Specialists (Gustaaf at AOC)
CASA Tutorial -- 7 October ...
Introduction to CASA
and Basic Data
Reduction Overview
Steven T. Myers
CASA Project Scientist
(NRAO) Beta Release Status
CASA Status:
in Beta Release since October 2007
roughly quarterly “patches”
Current Release: Beta Release Patch 3
target release date October 15
general release
register at my.nrao.edu , no password for download
CASA Tutorial -- 7 October 2008
2 Beta Disclaimer
This really is a Beta Release!
still missing functionality
there are known failure modes
will find new problems
Improvements in upcoming patches
move towards handling ALMA/EVLA “use cases”
better handling of calibration
CASA Tutorial -- 7 October 2008
3 Curriculum
schedule:
~1 hour orientation lecture + demo (this talk)
hands-on data reduction with datasets:
VLA Continuum Polarization (3C129)
VLA Spectral Line (NGC2403)
BIMA 3mm line mosaic (NGC4826)
intended to be interactive
if you need help - ask!
CASA Tutorial -- 7 October 2008
4 Starting CASA
From your workstation (running RHEL):
type ‘casapy-test’ at prompt
this is the pre-release test version of Beta Patch 3 at AOC
quit CASA using ‘exit’
brings up IPython shell plus casalogger GUI
Other releases available for download
not yet built for Patch 3...
CASA Tutorial -- 7 October 2008
5 Getting User Support
First stop: Read the Manual!
CASA Home: http://casa.nrao.edu
Cookbook, and “help” within CASA
CASA Helpdesk & Support Cadres
“Helpdesk” under my.nrao.edu
submit Issues
User Support Specialists (Gustaaf at AOC)
CASA Tutorial -- 7 October 2008
6 Tutorial Contents
I - Interface
II - Tasks & Tools
III - Data in CASA
IV - Data Processing Workflow
V - Example Use Cases
CASA Tutorial -- 7 October 2008
7 I - Interface
Documentation
IPython & Python
Crashes & Recovery
CASA help
CASA task interface
CASA Tutorial -- 7 October 2008
8 CASA Documentation
CASA Analysis cookbook (draft):
http://casa.nrao.edu/Doc/Draft/Cookbook/casa_cookbook.pdf
CASA User Reference Manual:
http://casa.nrao.edu/docs/casaref/CasaRef.html
Python:
http://python.org/doc (e.g., see Tutorial for novices)
IPython:
http://ipython.scipy.org/moin/Documentation
matplotlib:
http://matplotlib.sourceforge.net/
CASA Tutorial -- 7 October 2008
9 CASA Interface
IPython
shell access
autoparenthesis (autocall)
command history
session logging (ipython.log, casapy.log)
numbered input/output
history/searching
Python
see standard manuals, Cookbook Appendix D
CASA Tutorial -- 7 October 2008
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