The new catalogues of radio sources in the SMC at five radio frequencies are given in Paper V and in Filipovic (1996). There is a total of 224 radio sources towards the SMC. The area that these catalogues cover is 42 square degrees between RA(B1950)=0012 to 0138 and Dec(B1950)=-6940 to -7620.
As clear radio detections, we listed only radio sources that are stronger than 5 or seen in at least two frequencies.
An atlas and catalogues of IR sources in the MCs were published by Schwering & Israel (1990) and further information about MC IR surveys can be found there. Altogether, some 1891 LMC and 249 SMC sources were listed in this study. Also as a check on the Schwering & Israel (1990) catalogues we have used the IRAS FITS images obtained from Skyview (http://skview.gsfc.nasa.gov/skyview.html).
The angular resolution of the IRAS maps of the MCs was not precisely known, owing to their special beam pattern (Meylnik & Rice 1990). Because of the method used to deconvolve the dirty IRAS beam it was known only that the maps at four IR frequencies have equal resolution. On this assumption and the known positions of K and M stars from the SAO catalogue we fitted some of the bright stars in the 12-m image with a two-dimensional Gaussian fitting routine. The resolution derived by this method is 3.7 for the original maps.
A large fraction of sources listed in Schwering & Israel (1990) catalogues could not be identified in the IRAS FITS images. Therefore, it is very difficult to estimate a number of sources that have positional coincidence by chance alignment.
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