Eventdisplay reconstruction and analysis pipeline for ground-based imaging atmospheric Cherenkov Telescopes

There is a newer version of the record available.

Published August 28, 2025 | Version v5.16.0
Software Open

Eventdisplay: An Analysis and Reconstruction Package for Ground-based Gamma-ray Astronomy

Authors/Creators

  • 1. DESY
  • 2. Department of Physics and Astronomy and the Bartol Research Institute, University of Delaware, Newark, DE 19716, USA

Description

Eventdisplay is a reconstruction and analysis pipeline for data of Imaging Atmospheric Cherenkov Telescopes (IACT). It has been primarily developed for VERITAS and CTA analysis.

Code, analysis files and scripts can be find in the Eventdisplay GitHub Organisation. Docker images are available from the Eventdisplay container registry.

In case Eventdisplay is used in a research project, please cite the following publication:

Maier, G.; Holder, J., Eventdisplay: An Analysis and Reconstruction Package for Ground-based Gamma-ray Astronomy, 35th International Cosmic Ray Conference. 10-20 July, 2017. Bexco, Busan, Korea, Proceedings of Science, Vol. 301. Online at [https://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=301], id.747 arXiv:1708.04048

New Feature

  • Improvements to small-array analysis:

    • acceptance of loss values > 0.2 and introduction of mitigating steps
    • dispBDTEnergy trains on logE instead of TMath::Power( 10., fdisp_energy_T[i] * log10( img_size[i] ) );
    • energy reconstruction (dispBDTEnergy) uses median instead of weighted mean
    • introduce TRAIN_RECO_QUALITY and TRAIN_RECO_METHOD BDT machine learners
    • improved weight expression for training of dispBDTs
    • (many typo and code layout fixes)

    (#171)

  • Improve dispBDT analysis for small arrays.

    Re-calculate stereo parameters for the array configuration under consideration. This was actually a bug, as the stereo parameters calculated for the full (hyper) array were used to calculate the emission height and the direction coordinates used for the cross calculation. Recalculate using the simple stereo reconstructor.

    Change scale to logarithmic for several variables used by the dispBDTs (width, tgrad_x, length, cross) to improve regression performance. (#178)

Maintenance

  • Enable towncrier change logs. (#176)
  • Fix GitHub build workflows after updates of several dependencies. (#181)

What's Changed

  • Fix depreciated ENV settings in docker by @GernotMaier in https://github.com/Eventdisplay/Eventdisplay/pull/174
  • Towncrier by @GernotMaier in https://github.com/Eventdisplay/Eventdisplay/pull/176
  • Apply precommit by @GernotMaier in https://github.com/Eventdisplay/Eventdisplay/pull/177
  • Fix build action. by @GernotMaier in https://github.com/Eventdisplay/Eventdisplay/pull/181
  • Bump actions/checkout from 4 to 5 by @dependabot[bot] in https://github.com/Eventdisplay/Eventdisplay/pull/180
  • Changes for small-array analysis by @GernotMaier in https://github.com/Eventdisplay/Eventdisplay/pull/171

Full Changelog: https://github.com/Eventdisplay/Eventdisplay/compare/v5.15.0...v5.16.0

Notes

If you use this software, please cite it using these metadata.

Files

Eventdisplay/Eventdisplay-v5.16.0.zip

Files (1.5 MB)

Name Size Download all
md5:8aab882837646cfbf0695363e0e93730
1.5 MB Preview Download

Additional details

Related works

Is supplement to
Software: https://github.com/Eventdisplay/Eventdisplay/tree/v5.16.0 (URL)

Software

Repository URL
https://github.com/Eventdisplay/Eventdisplay