EVN data analysis
- How did your experiment go? The
EVN Feedback Pages
provide brief reports posted by staff at the EVN telescopes.
- All EVN user experiments are now automatically pipelined by JIVE support scientists. Users can peruse the pipeline output (plots) and otbain the AIPS calibration/flagging tables produced. (The raw versions of files underlying some of these tables can be found on the EVN vlbeer server in Bologna.)
- An EVN Data Reduction Guide is available.
- The VLBI tutorials from the
2015
European Radio Interferometry School, created by Minnie Mao, provide
a hands-on introduction:
- The basic tutorial, which covers data inspection & flagging, removing instrumental delays, frequency- & time-dependent phase calibration, bandpass calibration, and the initial imaging of one of the sources in the data set.
- The follow-on tutorial, continues from the previous one, improving the images via self-cal loops and imaging other sources in the data set.
- Both tutorials use this FITS file as their data set (size = 1.07 GB).
- The initial reduction and calibration of EVN data is performed with AIPS (home, cookbook).
- Martin Shepherd's Difmap program can also be used for imaging and self-calibration of EVN data.
- The performance of the telescopes during an experiment can be compared to that expected as tabulated in the EVN status table.
- The positions of some EVN telescopes used by the EVN correlator were updated towards the end of April 2002 and data correlated before this can be corrected.
Last modified: January 08, 2019
EVN webmaster (jive{at}jive.eu)
EVN webmaster (jive{at}jive.eu)