IR part of the spectrum › Forums › Variable Stars › PNV J00425895+4126279 › IR part of the spectrum 12 September 2017 at 4:50 pm #578556 Robin LeadbeaterParticipant The spectrum beyond ~7700A (~pixel 500) is unusable in its current state because of the severe optical etalon type interference fringes, common in IR spectrographs. A careful flat correction would be needed to remove them. Robin
