Observing Help for GMRT Users

Sample Selection

We select our list of target calibrator fields from the VLA calibrator manual which met the following criteria:

  • S20 cm > 0.5 Jy and
    • I - The source should be (a) a P-class at A-array and B-array VLA configurations, and (b) either a P-class or a S-class at C-array and D-array VLA configurations (121 sources).
    • II - The source is either a P-class or a S-class at A-array or B-array VLA configurations (301).
    • III - Rest 250 sources in VLA calibrator manual.

    • I - The source should be a S-class at A-array VLA configuration at 90 cm (77 sources).
    • II - The source should be a S-class at B-array VLA configuration at 90 cm (Rest 51 sources).
    • III - Rest 34 sources in VLA calibrator manual at 90 cm.
From this list, we are presently focussing on the first 121 (priority I) sources at 20 cm.