Modify one or more of the matrices used to describe the response of the
associated data set to incident X-rays.
XSPEC> response [<filespec>...]
where <filespec> =:: [<data set num>] <file name>..., where <file name> is the name of the response file to be used for the response of the associated data set. <data set num> is the data set number for the first <file name> in the specification, <data set num>+1 is the number for the next file, and so on. If no <data set num> is given in the first <filespec>, it is assumed to be one (1). If no file specifications are entered, then none of the data set responses are modified. An error message is printed if the data set number is greater than the current number of data sets (as determined from the last use of the data command. A file name none indicates that no response is to be used for that data set. This situation means that any incident spectrum will produce no counts for those particular channels. If a file is not found or can not be opened for input, then the user is prompted for a replacement response file. An <EOF> at this point is equivalent to using none as the response. See the data command for ways to totally remove the data set from consideration. The user also is prompted for a replacement if the response file has a different number of PHA channels than the associated data set. A warning will be printed out if the response detector ID is different from the associated data set's.
The current ignore status for channels is not affected by the command. (See the ignore and notice commands).