Description

This function sets the value of the instrument field in the CALDB structure. The case does not matter (it gets converted to upper case when actually querying the CALDB).

This field corresponds to the value of the FITS INSTRUME keyword and the instrument parameter of quizcaldb; for Chandra data it should be set to "ACIS" or "HRC".

The caldb module is not available by default; to use it in a S-Lang program, it must be loaded using the S-Lang require() function:

  require("caldb");