next previous
Up: A 45-MHz continuum

4. Presentation of the data

The survey is presented in two sets of maps, in equatorial and galactic coordinates, following approximately the format of Haslam et al. (1982) survey. In equatorial coordinates (1950 Epoch) the survey consists of a set of seven maps covering tex2html_wrap_inline1389, 4 hours in right ascension each, and the south polar region tex2html_wrap_inline1391 (Fig. 1 (click here)). A grid of galactic coordinates is superposed to each map. In galactic coordinates the survey consists of a set of eight maps (Fig. 2 (click here)). Six maps cover the longitude ranges tex2html_wrap_inline1393 and tex2html_wrap_inline1395, and the latitude ranges tex2html_wrap_inline1397, tex2html_wrap_inline1399, and tex2html_wrap_inline1401. Two additional maps cover the galactic poles in the ranges tex2html_wrap_inline1403, and tex2html_wrap_inline1405. A grid of equatorial coordinates is superposed to each map.

The contour lines correspond to brightness temperature and are labelled as follows: up to 6000 K in 250 K steps, labelled every 1500 K; from 6000 K to 10000 K in 400 K steps, labelled every 2000 K; from 10000 K to 20000 K in 1000 K steps, labelled every 10000 K; from 20000 K to 76000 K in 2000 K steps, labelled every 20000 K.

Arrows on contour lines indicate directions of decreasing temperature. Figure 3 (click here) presents contour lines for the whole survey in equal-area projection of galactic coordinates. Figure 4 (click here) shows a color coded map of the whole survey in equal-area projection of galactic coordinates.



Copyright by the European Southern Observatory (ESO)
web@ed-phys.fr