Karl G. Jansky VLA Tutorials: Difference between revisions

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== Introduction ==
== Introduction ==


The Jansky VLA Tutorials are meant to guide the observer through some common types of data analysis, using example datasets, and including explanations of the individual steps. These analyses will be broadly applicable to many EVLA datasets.  
The Karl G. Jansky Very Large Array (VLA) Tutorials are meant to guide the observer through some common types of data analysis, using example datasets, and including explanations of the individual steps. These analyses will be broadly applicable to many VLA data sets.  




If you are new to Jansky VLA Data, you may start with <h3>[[VLA: Getting Started | Getting Started with Jansky VLA data]]</h3>
If you are new to VLA Data, you may start with <h3>[[VLA: Getting Started | Getting Started with VLA data]]</h3>


== Jansky VLA Tutorials ==
== VLA Tutorials ==




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<blockquote>
Calibrate and make image cubes of the line emission from this asymptotic giant branch star. This is a high-frequency Jansky VLA dataset.  Includes:
Calibrate and make image cubes of the line emission from this asymptotic giant branch star. This is a high-frequency VLA dataset.  Includes:
* Inspecting data; basic flagging & calibration
* Inspecting data; basic flagging & calibration
* Subtracting continuum emission  
* Subtracting continuum emission  
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<blockquote>
<blockquote>
Calibrate Jansky VLA full polarization data, image a mosaic of the region in full Stokes and create a spectral index map.  Includes:
Calibrate VLA full polarization data, image a mosaic of the region in full Stokes and create a spectral index map.  Includes:
* Inspecting data; basic flagging  
* Inspecting data; basic flagging  
* Calibration
* Calibration
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</blockquote>
</blockquote>


== Jansky VLA Tutorials for more Advanced Users ==
== VLA Tutorials for more Advanced Users ==


* '''Supernova SN2010FZ: Wide-band, narrow-field imaging; C-band (5-7 GHz)'''  (CASA 4.4)
* '''Supernova SN2010FZ: Wide-band, narrow-field imaging; C-band (5-7 GHz)'''  (CASA 4.4)
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<blockquote>
<blockquote>
Calibrate and image a galaxy field for this mid-frequency Jansky VLA observation.  This includes:
Calibrate and image a galaxy field for this mid-frequency VLA observation.  This includes:
* Excising RFI from the data
* Excising RFI from the data
* Basic flagging and calibration steps
* Basic flagging and calibration steps
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<blockquote>
This low-frequency Jansky VLA tutorial for the observation of a supernova remnant focuses on RFI excision as well as imaging wide-field and wide-fractional-bandwidth data.  This includes:
This low-frequency VLA tutorial for the observation of a supernova remnant focuses on RFI excision as well as imaging wide-field and wide-fractional-bandwidth data.  This includes:
* Basic flagging and evaluation
* Basic flagging and evaluation
* Different methods for automatic RFI excision
* Different methods for automatic RFI excision
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</blockquote>
</blockquote>
<blockquote>
<blockquote>
This low-frequency Jansky VLA tutorial for the observation of a giant radio remnant focuses on low frequency wide-fractional-bandwidth data in the sub GHz regime .  This includes:
This low-frequency VLA tutorial for the observation of a giant radio remnant focuses on low frequency wide-fractional-bandwidth data in the sub GHz regime .  This includes:
* Basic flagging and evaluation
* Basic flagging and evaluation
* Automatic RFI Excision
* Automatic RFI Excision

Revision as of 17:19, 9 May 2016

Introduction

The Karl G. Jansky Very Large Array (VLA) Tutorials are meant to guide the observer through some common types of data analysis, using example datasets, and including explanations of the individual steps. These analyses will be broadly applicable to many VLA data sets.


If you are new to VLA Data, you may start with

Getting Started with VLA data

VLA Tutorials

  • Carbon Star IRC+10216: high frequency (36GHz), spectral line data reduction (CASA 4.6)
  • This tutorial requires to download a dataset 1.1GB in size

Calibrate and make image cubes of the line emission from this asymptotic giant branch star. This is a high-frequency VLA dataset. Includes:

  • Inspecting data; basic flagging & calibration
  • Subtracting continuum emission
  • Imaging the spectral lines
  • Imaging the continuum
  • Image analysis
  • Self-calibration


  • Supernova Remnant 3C391: 6cm Polarimetry and Continuum Imaging, Mosaicking (CASA 4.6)
  • This tutorial requires to download a dataset 3.1GB in size

Calibrate VLA full polarization data, image a mosaic of the region in full Stokes and create a spectral index map. Includes:

  • Inspecting data; basic flagging
  • Calibration
  • Image Analysis and Manipulation
  • Polarization Imaging
  • Spectral Index imaging
  • Self-calibration

VLA Tutorials for more Advanced Users

  • Supernova SN2010FZ: Wide-band, narrow-field imaging; C-band (5-7 GHz) (CASA 4.4)
  • This tutorial requires to download a dataset 2.9GB in size

Calibrate and image a galaxy field for this mid-frequency VLA observation. This includes:

  • Excising RFI from the data
  • Basic flagging and calibration steps
  • Imaging from one spectral window to full dataset
  • Using multi-scale, multi-frequency synthesis
  • Image analysis
  • Protostar G192.16-3.84: Wide-band, narrow-field imaging using 3-bit sampled data; Ka-band (27-38 GHz) (CASA 4.4)
  • This tutorial requires the download of an 18GB dataset

Calibrate and image a protostar for this high-frequency VLA observation taken using the 3-bit samplers. Note that this tutorial can be used as a guide for 8-bit data as well. This includes:

  • Deleting bad data and RFI
  • Basic calibration, including tropospheric opacity and requantizer gain corrections
  • Bootstrapping to determine the spectrum of the bandpass calibration source
  • Imaging from a single spectral window to the full dataset
  • Using multi-frequency synthesis imaging
  • Image analysis
  • Supernova G55.7_3.4: Wide-band, wide-field imaging; L-band (1-2 GHz) (CASA 4.4)
  • This tutorial requires to download a dataset 14GB in size

This low-frequency VLA tutorial for the observation of a supernova remnant focuses on RFI excision as well as imaging wide-field and wide-fractional-bandwidth data. This includes:

  • Basic flagging and evaluation
  • Different methods for automatic RFI excision
  • Calibrating the data
  • Exploring different imaging options: widefield, multi-scale, and multi-frequency synthesis
  • P-band continuum imaging data reduction tutorial (CASA 4.6)
  • This tutorial requires to download a dataset 21GB in size

This low-frequency VLA tutorial for the observation of a giant radio remnant focuses on low frequency wide-fractional-bandwidth data in the sub GHz regime . This includes:

  • Basic flagging and evaluation
  • Automatic RFI Excision
  • Ionospheric Calibration
  • Self - Calibration

Specific Topics

Presents the basics of writing a CASA task, and provides examples of tasks that will be helpful and instructive.

Demonstrates the use of the contributed "stitch" task to edit data which has been obtained in an overlapping subband mode.


Other


CASA 4.6 versions

CASA 4.5 versions


CASA 4.4 versions


CASA 4.3 versions

CASA 4.2 versions


CASA 4.1 versions


CASA 3.4 versions





CASA 3.3 versions




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