The GMRT 150 MHz all-sky radio survey

We present the first full release of a survey of the 150 MHz radio sky, observed with the Giant Metrewave Radio Telescope (GMRT) between April 2010 and March 2012 as part of the TIFR GMRT Sky Survey (TGSS) project. Aimed at producing a reliable compact source survey, our automated data reduction pipeline efficiently processed more than 2000 h of observations with minimal human interaction. Through application of innovative techniques such as image-based flagging, direction-dependent calibration of ionospheric phase errors, correcting for systematic offsets in antenna pointing, and improving the primary beam model, we created good quality images for over 95 percent of the 5336 pointings. Our data release covers…

• NS
  National Science Foundation
• SI
  Smithsonian Institution
• NA
  National Aeronautics and Space Administration
• CI
  California Institute of Technology
• NR
  National Radio Astronomy Observatory
• AU
  Associated Universities
• TI
  Tata Institute of Fundamental Research
• NO
  Nederlandse Organisatie voor Wetenschappelijk Onderzoek
• JP
  Jet Propulsion Laboratory
• SA
  Smithsonian Astrophysical Observatory