Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 22: Poster

T 22.11: Poster

Monday, March 25, 2019, 16:00–18:30, C.A.R.L. Foyer 1. OG

Towards Run Wise Simulations for the HAWC Observatory — •Edna L. Ruiz-Velasco for the HAWC collaboration — Max Planck Institute for Nuclear Physics, Heidelberg, Germany

The High-Altitude Water Cherenkov (HAWC) is a wide-field of view gamma-ray observatory located in Sierra Negra, Mexico. It is dedicated to study astrophysical sources of very-high energy (VHE) gamma rays from  0.1 to 100 TeV. In the most conservative way (and the currently used one) simulations of air-shower detection is made with idealised detector conditions. Event reconstruction, gamma/hadron separation, and high-level data analysis rely on optimisation and checks on simulated events. Therefore, a proper description and well modelled detector becomes extremely important to better estimate systematic uncertainties and reliable results. Dedicated work for an improvement on the HAWCs simulation chain will be presented in this contribution. The importance of a well estimated efficiency of each detector unit is addressed by implementing a correction of the individual PMTs light level based on an analysis of muons detected by HAWC. On this we can include the possible efficiency evolution of the detector during the operation time of HAWC (already spanning for almost 4 years). A new method for emulating the HAWC low level data (trigger level) will be also presented. This introduces the possibility of comparing data and Monte Carlo simulations at the trigger level and can be used to better simulate the detector by including the information of the calibration methods used in data.