TRISPEC Calibration Unit

Wavelength Calibaration Unit (WCU)

The instrument has a mercury-argon lamp (Hg-Ar lamp) for the wavelength calibration at the front of the dawer window. Since the intensities of the
emission lines vary largely as time passes after power on, it is recommended  to take a few frames with different passing times. Below are plots of the arc spectra obtained with TRISPEC. Also, a table of mercury and argon lines is available here.

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Last Modification Date: 2002/06/17
Last Modification Author: Makoto Watanabe <>