InSilicoLab for CTA offers a complete workspace for an Astrophysicitst who simulates the CTA telescopes with use of sim_telarray and read_hess programs. It is available to all Cherenkov Telescope Array consortium members with a Grid certificate registered in the CTA Virtual Organisation. The portal can be accessed from the CTA Science Gateway or directly through the link https://ctaportal.grid.cyfronet.pl.
Application-specific forms - depending on the chosen experiment (sim_telarray simulation or DST calculation), the input form contains fields suitable for the application used (sim_telarray or read_hess for the DST calculation). The forms provide suggestions for different program options.
Parameter sweep form - enables iterating over a set of values for a specified parameters while other values are constant.
Automatic parallelisation - in case the input data requires performing several computations, they are automatically configured and sent to a computing infrastructure. This will happen in two situations:
- Multiple input shower files are specified manually,
- A parameter sweep is configured.
Automatic results analysis - the sim_telarray computation results are automatically parsed with read_hess to extract relevant information:
- Run number
- ID of primary particle
- Number of events, total
- Number of events, triggered
- Altitude (mean) [deg.]
- Azimuth (mean) [deg.]
- Cone (max) [deg.]
- Lower limit of energy range [TeV]
- Upper limit of energy range [TeV]
- Spectral index in simulation
- Spectral index in weighting
- Weighted sum of events, total
- Weighted sum of events, triggered
- Maximum horizontal core distance in X
- Maximum horizontal core distance in Y
- Maximum core distance in shower plane
- Supposed maximum core distance
The original application output files are also available for download Advanced computation options - optimization of the computation parameters on the e-Infrastructure - read more...
sim_telarray is a code used for simulation of arrays of Cherenkov telescopes. It allows to define different detectors with different read out, different triggering schemes or different reflectors. Simulations include optical ray-tracing, night-sky background, all relevant electronic pulse shapes, switching behaviour of comparators or discriminators.
read_hess software attempts to reconstruct events seen by the telescope by applying various image analysis methods, image cleaning etc.
eventdisplay is a software package for analysis of data from ground-based gamma-ray observatories like VERITAS and CTA. It was originally developed as display for the VERITAS prototype data, but evolved into a full analysis package with routines for calibration, FADC trace integration, image and stereo parameter analysis, response function calculation and high-level analysis steps (e.g. sky maps and spectral analysis). The original authors of eventdisplay are Jamie Holder and Gernot Maier.
Sim_telarray parameters configuration.
Trigger Efficiency chart calculated for a set of different telescope array parameters.
PostScript DST file generated with read_hess
Video demonstrating simulations with sim_telarray.