A novel energy reconstruction method for the MAGIC stereoscopic observation

Abstract

We present a new gamma ray energy reconstruction method based on Random Forest to be commonly used for the data analysis of the MAGIC Telescopes, a system of two Imaging Atmospheric Cherenkov Telescopes. The energy resolution with the new energy reconstruction improves compared to the one obtained with the LUTs method. For standard observations i.e. dark conditions with pointing zenith (Zd) less than 35 deg for a point-like source, the energy resolution goes from $\sim 20\%$ at 100 GeV to $\sim 10\%$ at a few TeV. In addition, the new method suppresses the outlier population in the energy error distribution, which is thus better described by a Gaussian distribution. The new energy reconstruction method enhances the reliability especially for the sources with steep spectra, in higher energies and/or in observations at higher Zd pointings. We validate the new method in different ways and demonstrate some cases of its remarkable benefit in spectral analysis with simulated observation data.

Accepted version

References in corpus (21)

• Observations of the Crab Nebula with H.E.S.S
• The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula
• A high performance likelihood reconstruction of gamma-rays for Imaging Atmospheric Cherenkov Telescopes
• VHE Gamma-Ray Observation of the Crab Nebula and its Pulsar with the MAGIC telescope
• Teraelectronvolt emission from the $\gamma$-ray burst GRB 190114C
• The major upgrade of the MAGIC telescopes, Part I: The hardware improvements and the commissioning of the system
• Performance of the MAGIC stereo system obtained with Crab Nebula data
• Implementation of the Random Forest Method for the Imaging Atmospheric Cherenkov Telescope MAGIC
• Observation of inverse Compton emission from a long $\gamma$-ray burst
• A Monte Carlo Template based analysis for Air-Cherenkov Arrays
• Improving the performance of the single-dish Cherenkov telescope MAGIC through the use of signal timing
• Measurement of the Crab Nebula spectrum over three decades in energy with the MAGIC telescopes
• Unfolding of differential energy spectra in the MAGIC experiment
• Bounds on Lorentz invariance violation from MAGIC observation of GRB 190114C
• MAGIC very large zenith angle observations of the Crab Nebula up to 100 TeV
• Unravelling the complex behavior of Mrk 421 with simultaneous X-ray and VHE observations during an extreme flaring activity in April 2013
• Detection of the Geminga pulsar with MAGIC hints at a power-law tail emission beyond 15 GeV
• Six years of VERITAS observations of the Crab Nebula
• Monte Carlo Studies of Geomagnetic Field Effects on the Imaging Air Cherenkov Technique for the MAGIC Telescope Site
• Monte Carlo Simulation for the MAGIC-II System
• Deep learning techniques for Imaging Air Cherenkov Telescopes