ChiByEye
XSPEC Model Visualizer ๐๏ธ๐
Code developed by Paulo Silva (MIT)
Code developed by Paulo Silva (MIT)
๐ง Load XSPEC models manually or from .xcm files
๐ง Adjust model parameters using sliders or textboxes
๐ Visualize:
Complete spectral models
Individual model components
Ratio and residual plots
๐จ Customize plot styles and axes
๐งฎ Perform fits using XSPEC's backend
๐ค Export plots and save model states
To use ChiByEye, you need:
Python 3.x
XSPEC (via HEASoft) and its pyxspec Python bindings
Python packages:
pip install numpy matplotlib pyqt5
python ChiByEye.py
Home screen: Input a model name (e.g., powerlaw) or load one from the menu.
Generate Plot: Visualizes the current model based on parameters.
Plot Menu:
View different XSPEC modes (model, emodel, eemodel)
Plot different components
Plot same model N times (vary one parameter across values)
Data Plotting: Load .xcm files with spectra and choose to view:
data
data + ratio
eufspec + delchi
View Menu: Toggle sliders/textboxes, show frozen parameters, and set custom axes.
File โ Load Model as XCM: Load XSPEC model file
File โ Load Data as XCM: Load model + data
File โ Save Parameters as XCM: Export current state
File โ Save Plot: Save current figure as PNG
File โ Load Plot Style File: Apply custom .mplstyle
Questions or feedback? Reach out to us!
Paulo Silva (pauloh@mit.edu) โ MIT
Paul Draghis (pdraghis@mit.edu) โ MIT
An example file test_file.xcm is provided for demonstration.
This project is released under the MIT License.
If using XSPEC in your research, please cite it appropriately.
If this software aids your research, please cite:
Arnaud, K. A. (1996). XSPEC: The First Ten Years. Astronomical Data Analysis Software and Systems V, ASP Conf. Series, 101, 17.