This information is given in the following three tables. This refers to normal data products which have caveats are described in the footnotes. Occasionally a particular data set may be affected by an event which will degrade the accuracy of that particular observation. Pipeline products are not validated owing to a problem of misalignment of the underlying grating response profile. This is caused by uncertainty in the grating wavelength calibration.
Bright sources cause some of the detectors to become non-linear.
A method of correcting this has been devised. A more sophisticated method of correction is thus required. Uncertainty about the behaviour of the detector dark currents during an observation can lead to problems with the calibration of faint spectra. There is evidence that observation of a bright source before a faint one has caused the dark current to be higher than expected and to be decaying during the subsequent observation. An instrument model is required that will allow the determination and removal of the contamination.