VV report for obsid 16244 - Crab Pulsar (in M 1)

Review Status: warning
Comments: The MCP HV levels and the trigger threshold of the instrument were set to non-standard values and as such the instument is no longer calibrated. Use of the LETG grating with HRC for an extended source results in a degradation of the spectral resolution. There is no longer a unique mapping between position of an event on the focal plane and wavelength. Non-standard MCP HV setting used for this observation. The setting usedis top=91, bottom=103. This setting is intermediate between the originaldefault HV setting for HRC and the 2012 revised default HV setting.THERE IS NO DETECTOR GAIN CALIBRATION FOR THIS HV SETTING. This observation was processed with custom gti-limit parameters to allow events from non-standard voltages to be included in gti. LETG grating inserted as a filter only.