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
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
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