If the source variation is large, RMS of source count rate may give better estimate of the uncertainty of the count rate. Default values yield all data, but requires longer time, which may cause timeout error. We strongly recommend specifying the time region especially for bright persistent sources. According to MIT, 1.5 is a good criterion. Specify minimum count rate to output.
Negative value is acceptable.
We found a bug for QDP or Robot Mode in case count rate is negative. Until this bug is fixed, these modes are not available.