(Waldram, E.M., Pooley, G.G., Grainge, K.J.B., Jones, M.E., Saunders, R.D.E., Scott, P.F., Taylor, A.C., 2003, MNRAS, accepted; available pre-publication astro-ph/0304275 )
The 9C survey of radio sources is being made with the Ryle Telescope at a frequency of 15.2 GHz and a resolution of 25 x 25 cosec(dec) arcsec2.
It was set up as part of the observing strategy of the Very Small Array (VSA) and its prime motivation has been to define a catalogue of the foreground sources which must be monitored by the VSA during its observations of the cosmic microwave background. It is, however, of much wider interest, being the first survey to cover an appreciable area at a comparable radio frequency.
The regions surveyed correspond to the fields chosen for the VSA observations, rather than forming one large contiguous area. Source lists and a CDS-style ReadMe specification of the regions covered are being made available via ftp.
Reminder: Shift Click will save a file rather than displaying it !
The source catalogues are described by the accompanying CDS-style ReadMe file. They can be accessed via the 9C ftp directory - or you can use the individual links in the table below.
The catalogues currently available cover three circular areas:
| Field name | RA, Dec of centre (J2000) | Radius | No. of sources |
|---|---|---|---|
| 0020p30.dat | 00h 17m 36.5s 30° 16' 39" | 5.5° | 84 |
| 0940p32.dat | 09h 40m 57.7s 31° 46' 21" | 6.0° | 103 |
| 1540p43.dat | 15h 36m 42.7s 43° 20' 11" | 5.0° | 55 |
These source lists are complete to ˜ 25 mJy and at present no sources are included below that level.
Last modified 9 May 2003