MEGAlib v4.02

Version 4.02

This is mostly a compatibility, bug fix, and minor updates release.
The main development towards MEGAlib 5.0 is happening in the branch develop-cosi.
However, as of Septmeber 2025, this branch contains a few features which only work with COSI.

General:

• Default ROOT version is 6.36
• Updates to run on all the latest OS'es

Mimrec:

• New ARM fitting tool

Fretalon / Melinator:

• Many updates to Melinator to improve the energy calibration

Version 4.00

General:

• License is now LPGL v3
• Default ROOT version is 6.28
• C++-2014 is now default
• Updates for all the latest OS'es
• Improvements to the dmegalib parallel simulation environment
• Improved event and file writting

Geomega:

• Speed ups reading large files
• Fixed if-statement evaluations
• Voxel3D is now allowed not to be a box detector
• The geometry view is now restored after a reload of the mass-model
• Option to automatically view the geometry upon launch
• Do not allow to define multiple surrounding spheres
• Fix path in which cross-section are stored

Cosima:

• mcosima has the new option "-a" to not generated concatenation files
• gzip'ing sim files is now default
• Improvements to the orientation handling to enable COSI data challenge simulations
• Enable a timeout (stop simulating) if no new events are stored after 30 minutes
• Added Comptonization model as spectrum
• Added cutoff power law
• Added more unit tests

Response:

• Parallel reading of spares rsp files
• Cleanup interface in responsemanipulator
• Option to collapse response matrices
• Store simulation parameters in rsp files

Mimrec:

• Changes for near-field imaging
• Fixes in binned-mode imaging
• Default color palette now is Viridis
• Spherical images now can have hammer projection too
• Save the cfg file via command line
• Enable polarization analysis in Galactic coordinates
• Feature to perform box selections on first and second interactio

Revan:

• Save the cfg file via command line
• Add energy windows to Bayesian and TMVA reconstrcution

Fretalon / Melinator:

• Significant speed ups and optimizations to handle new COSI calibrations
• Parallelization of spectrum generation
• UI: Added peak finding options to UI, scrollbar for options, include errors for peak fitting, minor canvas changes

Examples:

• Sensitivity optimizer
• Add test data for MEGAlib's getting started guide

Known issues:

• Cosima: Activation simulations still miss some important lines
• Cosima: Using light curves with large time numbers (i.e. corresponding to current date in seconds) can create artificial spikes

And many smaller bug fixes and optimizations