XFitLLS GUI¶
Overview¶
XFitLLSGUI is a GUI for the by-hand fit to one or more LLSs in an input spectrum. One can modify both the continuum and LLS properties and write the solution to disk as a JSON file.
Running XFitLLSGUI¶
XFitLLSGUI should be called from the terminal using the script pyigm_fitlls. Here is the usage:
wolverine> pyigm_fitlls -h
usage: pyigm_fitlls [-h] [--out_file OUT_FILE] [--smooth SMOOTH]
[--lls_fit_file LLS_FIT_FILE]
in_file zqso
Parser for FitLLSGUI (v1.0)
positional arguments:
in_file Spectral file
zqso Use Telfer template with zqso
optional arguments:
-h, --help show this help message and exit
--out_file OUT_FILE Output LLS Fit file
--smooth SMOOTH Smoothing (pixels)
--lls_fit_file LLS_FIT_FILE
Input LLS Fit file
There are 2 required arguments: (1) in_file which is the input spectrum file; (2) zqso which is an estimate of the quasar (or other source) emission redshift.
Optional arguments¶
Argument | Description | Default |
---|---|---|
-h, –help | Show the help message and exit | |
-o OUT_FILE, –out_file OUT_FILE | Output JSON file with model | DLA_fit.json |
–smooth SMOOTH | FWHM Gaussian smoothing for fitting (in pixels) | 3 |
–lls_fit_file LLS_FIT_FILE | Input .JSON file containing a previous DLA fit |
Usage¶
When the LLS gui launches, you should begin by left clicking in the plot window. This will activate plotting and key strokes (see below for the help message). Then press “#” to specify the model spec and to add a continuum. You should then refine the continuum (“C”, “1”, “2”).
From there, navigate to the LLS of interest, add a model (“A” or “F”), refine it and the continuum, etc.
The Write button saves the current model to disk as a JSON file.
Keystrokes¶
Here is a brief description of the key strokes that control the DLA GUI (also displayed when launching the GUI):
i,o : zoom in/out x limits
I,O : zoom in/out x limits (larger re-scale)
Y : zoom out y limits
y : guess y limits
W : Show original zooom
t,b : set y top/bottom limit
l,r : set left/right x limit
C : Set the continuum normalization to the cursor
1,2 : Tilt the continuum
A : Add a new LLS at cursor
F : Add a new LLS automagically near the cursor (probably)
g : Move nearest Lyman line to cursor and reset z
N/n : Increase/decrease NHI
V/v : Increase/decrease bvalue
Z/z : Increase/decrease zabs
D : Delete LLS
$ : Toggle displaying metal lines
6,7,8,9 : Add forest lines
? : Print these help notes
Q : Quit the GUI