Karl G. Jansky VLA Tutorials

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EVLA Tutorials

  • Carbon Star IRC+10216: high frequency (36GHz), spectral line data reduction

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

Calibrate EVLA 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

EVLA Tutorials for more Advanced Users

  • Supernova SN2010FZ: Wide-band, narrow-field imaging; C-band (5-7 GHz)

Calibrate and image a galaxy field for this mid-frequency EVLA 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


  • Supernova G55.7_3.4: Wide-band, wide-field imaging; L-band (1-2 GHz)

This low-frequency EVLA 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

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 combine data which has been obtained in overlapping subband mode (to achieve a constant rms noise across an observed frequency range).

Other