SPECTRUM GUI

The script spectrum_sh.tcl, which should be in your SPECTRUM distribution, is a Tcl/Tk graphical user interface for SPECTRUM. If you ran the make install script in §  the script spectrum_sh.tcl should have been placed in /usr/local/bin. If you can't run it, it may be necessary to get root permission and then to change the mode so that the file is executable.

This shell may be invoked by typing at the prompt:

> spectrum_sh.tcl

The GUI will come up and should look like Figure .

Figure: The Tcl/Tk GUI for SPECTRUM.

The buttons on the top row can be used to select the atmosphere model, the atomic data file (stdatom.dat), the isotope definition file (isotope.iso), the spectral linelist and the output file. The computation parameters are self-explanatory and must be supplied. The shell enables the user to apply a number of switches which control the operation of SPECTRUM. Please read §  to understand the meaning of these switches. On the first row, the default output (Normalized Intensity), absolute flux, or center of disk switches can be set (corresponding to: no switch, f and m, respectively). On the second row, the isotope mode may be turned on (the isotope definition file must have been selected above) and/or the facility to read ATLAS9 default headers (switch t) can be selected. If selected, the output spectrum may then be smoothed using MACTURB (which convolves the spectrum with a macroturbulent velocity line profile), AVSINI, which rotationally broadens the output spectrum, and SMOOTH2, which convolves the output spectrum with a Gaussian function. To execute, press the Execute button. To see the progress as SPECTRUM steps through the wavelength region, click the Progress check box. Pressing Quit will exit the shell.

Please note that this shell is not absolutely foolproof. Please pay very close attention to the ``*'''ed boxes - i.e. the isotope box and the output spacing box for the Smooth option.