7C

The 7C survey covers most of the northern hemisphere above a declination of 20°, but generally away from the Galactic plane, at 151 MHz, with a resolution of 70×70 cosec(declination) arcsec² (EW×NS) (i.e., about four times better resolution than the 6C survey); a separate survey with resolution 108×108 cosec(declination) arcsec² covers a strip between declinations 20° and 35° to provide some intermediate resolution data to the south of 6C.

The northern Galactic plane is covered by the 7C(G) survey.

The 7C source lists in computer readable form at MRAO are now in a standardised format; you can retrieve all of them by ftp or single sections from the ftp link beside each section below.
Note that the lowdec survey at intermediate resolution 108 x 108cosec(dec) arcsec² has its own standard format.

Caveat ! Journal tables retrievable from the data centres and via the literature reference links listed below are in the same format as printed in the journal (where applicable), which in some cases will be non-standard with respect to the overall survey.

Regions surveyed at resolution 70 x 70cosec(dec) arsec², ftp accesses standardised data:-

• regions centred at 10^h28^m, 41° and 6^h28^m, 45° - the analysis described by
  McGilchrist et al. 1990 MNRAS, 246, 110
  has been superseded by a more up-to-date analysis using standard 7C analysis methods and these data are now included in Riley 58 further regions below;
• a region centred at 17^h, 65° ; ftp ;
  Visser et al. 1995, A&AS, 110, 419;
• a region centred at 18^h, 66° ; ftp ;
  Lacy et al. 1995, MNRAS, 276, 614;
• three regions centred at 10^h05^m, 53°54' and 10^h42^m, 57°36' and 13^h32^m, 38°10' ; ftp ;
  Pooley et al. 1998, MNRAS, 298, 637.
• thirty three regions in the range 7^h to 17^h, 53° to 38° ; (as separate files or tar) ftp ;
  Riley et al. 1999, MNRAS, 306, 31.
• a further fifty eight regions ; (as separate files or tar) ftp ;
  released electronically by Riley et al. 2001.

Surveyed at resolution 108 x 108cosec(dec) arcsec² and with its own standard format:-

• a region covering 9^h to 16^h, 20° to 35° ; ftp ;
  Waldram et al. 1996, MNRAS, 282, 779 (erratum 284, 1007);

Last modified 23 November 2001