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Eventdisplay - version v490-alpha.1

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@GernotMaier GernotMaier released this 13 Jul 15:04
· 635 commits to main since this release
v490-alpha.1
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Eventdisplay v490 is a major update of the reconstruction and analysis code used for VERITAS.
This update includes significant changes which break the analysis of older versions at certain stages.

Running this version requires also updates to the newest versions of Eventdisplay_AnalysisScripts_VTS and Eventdisplay_AnalysisFiles_VTS (private repository).

This is a pre-release with substantial changes expected in near future. Please try it out, but don't use it for science publications.

Eventdisplay v490 is now public

Similar to the Eventdisplay version used for CTA (see here), this code is now public.

Optimised next-neighbour cleaning

(back ported from v5)

Improves the low-energy response.

  • requires to run Evetndisplay with the runparameter file EVNDISP.reconstruction.runparameter.NN.v4x

dispBDT angular resolution

(back ported from v5)

Improves direction reconstruction at low elevation angles (issue #184 and PR #190).

Note that dispBDT direction reconstruction is applied on the mscw_energy stage.

  • dispBDT files are located in $VERITAS_EVNDISP_AUX_DIR/DispBDTs
  • in alpha release: must be switched on in IRF.mscw_energy_MC.sh and ANALYSIS.mscw_energy.sh (search for DISPBDT)

Replacement of slalib routines by sofa

see PR #180

Eventdisplay has been using a copy of the slalib code since the very beginning (VASlalib). All astronometry routines are replaced by the sofa package (same authors as slalib; but permissive licence) for the following reasons:

  • slalib (as used in Eventdisplay) is not maintained since many years and the status of the routines is unclear (e.g. means that timing routines do not include leap seconds introduced recently)
  • slalib's licence unclear and very likely the current usage Eventdisplay is not allowed
  • sofa is a well maintained IAU package

#PR 180 lists some tests listing differences between using the two different astronometry packages: generally consistent results with max differences in reconstructions observations of <2 arcseconds.

Note that this involves the installation of the sofa package before compiling eventdisplay. Use the script install_sofa.sh to download and install the package.

Addition of mergeVBF binaries

mergeVBF is used for the simulation production to merge several (possibly 1000s) of simulation vbf files into one file.

Improved MC/Data comparison plots

Improvements to MC/Data comparison includes:

  • weighting of events according to the azimuth of the data runs
  • energy-dependent theta2 comparision

Code cleanup

Eventdisplay-code base includes a lot of obsolete code which makes maintenance more difficult than necessary. Try and remove anything which will not be used in future: CTA-related code (uses v5), frogs and 3D model (will realistically never by used and would require a re-implementation); other smaller bits.

Code formatting (astyle) has been applied. For git diffs, best to remove white space comparision.

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