⬇️ Download

GitHub link: https://github.com/pdraghis/ChiByEye

📄 Documentation

🚀 Features

• 🧠 Load XSPEC models manually or from .xcm files

• 🔧 Adjust model parameters using sliders or textboxes

• 📊 Visualize:

  • Complete spectral models

  • Individual model components

  • Ratio and residual plots

• 🎨 Customize plot styles and axes

• 🧮 Perform fits using XSPEC's backend

• 📤 Export plots and save model states

📦 Requirements

To use ChiByEye, you need:

• Python 3.x

• XSPEC (via HEASoft) and its pyxspec Python bindings

• Python packages:

pip install numpy matplotlib pyqt5

⚠️ If you don’t have the relxill model installed, comment out line 38:  AllModels.lmod('relxill')

🛠️ How to Run

python xspec_plot_interface.py

🖥 Interface Overview

• 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 Operations

• File → Load Model as XCM: Load XSPEC model file

• File → Load Data as XCM: Load model + data

• File → Save Parameters as XCM: Export current state

• File → Save Plot: Save current figure as PNG

• File → Load Plot Style File: Apply custom .mplstyle

📬 Contact

Questions or feedback? Reach out to us!

• Paulo Silva (pauloh@mit.edu) — MIT

• Paul Draghis (pdraghis@mit.edu) — MIT

📄 License

This project is released under the MIT License.
If using XSPEC or relxill in your research, please cite them appropriately.

📚 Citation

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.