CFHT, Instruments, Spectroscopy, Gumball, Gumball Database, MOS Database.

Gumball: MOS Database

Here is the reference database spectra for MOS. After selecting your instrumental configuration below, several spectra previously obtained for this configuration by the CFHT staff will be displayed. The first spectrum is usually an "optimal" calibration frame, that is, all the lamps are used to cover the whole spectral range. The other spectra are the individual lamps available in Gumball (when relevant) and a cut of a spectrum taken with the halogen lamp for flat-fielding calibration.

For each spectrum, the following information is provided:

• An (clickable) image of the spectrum (window: [1:200:1:2048]) with a few bright lines identified.
• A first global cut of the central column ([100;0:2048]) with the same spectral lines identified.
• Several zoomed cuts covering smaller portions of the spectral range with more (and fainter) lines identified.
• Details concerning this calibration frame: lamp(s) used with the corresponding exposure time(s), grism, slit height, CCD, average dispersion measured, order sorting filter. The individual exposure times indicated for the lamps were selected to keep the brightest lines below the saturation limit of the detector (about 32000 ADUs for STIS2). These values are approximate: it is imperative that the observers first determine which exposure times are best suited for their needs.
• A link to the appropriate list of spectral lines (also accessible below).

Please, note that at this stage, the database is still incomplete. In the future, more data will be gathered and the database will offer additional information!

Select your instrumental configuration:

General List of Spectral Lines

Neon

Argon

Mercury(Argon)

Neon + Argon + Mercury(Argon)