The Hubble Space Telescope Guide Star Catalog (GSC, see Section , above) is divided into some 9537 regions and each region is held as a separate FITS table file. These FITS tables can be read directly by CURSA. However, there is a CURSA utility to convert them to a more convenient format. I recommend that you use it to convert a region before accessing the region with other CURSA applications. The utility generates a new version of the region with the following changes:
In order to convert a GSC region simply type:
The amount of textual information written to the output catalogue is controlled using the command line mechanism described in Section . You then answer the following prompt.
Here `CATIN' is the name of the corresponding ADAM parameter name, which appears at the start of the prompt line. The original version of the region is not overwritten, but rather a new catalogue containing the modified version is created.
GSC regions have names of the form region_number.gsc (where region_number is an integer number). The converted region is written to a file called gscregion_number.FIT. Thus, for example, the converted version of region 5828.gsc would appear as file gsc5828.FIT.
CURSA Catalogue and Table Manipulation Applications