Helium-Argon plots from different gratings at EFOS-II (ESO
3.6m, La Silla)
Helium-Argon plots from scanned MIDAS plots
Plots borrowed from the MOS-OSIS Spectral Atlas in the Canada-France-Hawai Telescope:
Plots borrowed from the calibration lamps from Hydra-CTIO, a multi-object, fiber-fed spectrograph which has been installed on the CTIO Blanco 4m telescope (Cerro Tololo, Chile):
http://ctios6.ctio.noao.edu/spectrographs/hydra/calibration/calibration_spectra.html