SMOV: COS FUV Wavelength Calibration

COS calibration program 11474 was carried out during SMOV to characterize the wavelength scales of the NUV detector. Science data were obtained with the G185M, G225M, G285M, and G230L gratings through the Primary Science Aperture (PSA), simultaneously with PTNe lamp line data, obtained through the Wavelength Calibration Aperture (WCA). These data were partially calibrated with the COS pipeline and then, in conjunction with STIS data of the same target, used to derive offsets between the PSA and WCA wavelength scales. These offsets are then used to place the dispersion relations derived from thermal vacuum 2003 (TV03) in the on-orbit frame of reference, so that correct wavelengths can be assigned to the on-orbit COS data.