Identify the lines in one of the rows of the spectrum

Difffferent parameters are used, indicated in the following fields of the Main window:

• the name of the table with the wavelengths of the comparison lines, indicated in the field Line Catalog.
• the range in wavelengths to be considered, indicated in Wavelength Range
• the Minimal Intensity in Catalog is used to perform a selection of the brightest lines of the catalog
• and the Calibration Starting Row will be used for the lines identifications. If this parameter is set to its default value 0, the central row will be considered.

After setting these parameters, click the button. to pop up the Identify window. The menu in the menu bar provides graphic related commands. The identification starts by clicking on , which plots one row of the spectrum in the graphic window, indicates the position of the detected arc lines with blue vertical traces and gives a cursor.

When a detected line is clicked on, the interface expects the corresponding wavelength to be clicked in the wavelength list. The identified line turns green and an identification message appears in the MIDAS monitor. It is then possible to identify a new line. When a sufficient number of identifications has been performed, clicking with the middle mouse button in the graphic window desactivates the cursor. The full spectrum is plotted by default. The x-axis and y-axis limits of the plot can be modified interactively with the menu . Clicking again on deletes all identification, while more identification can be added by clicking on . Identifications can also be removed one by one with the button .

  
Figure: Lines Identification Window