Reconstruction of Energy of Ultra-High-Energy Cosmic Rays Registered with a Fluorescence Telescope: One Time Frame Might Be EnoughстатьяИсследовательская статья
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Аннотация:We address the challenge of reconstructing the energy of three ultra-high-energy cosmic raysregistered with a small fluorescence telescope EUSO-TA that operated in 2015 at the site of the TelescopeArray experiment in Utah, USA. Each of these events was recorded within one time frame. Conventionalmethods of energy reconstruction are not applicable in this case because the events do not have light curvesbut a single data point. As an alternative, we consider a number of approaches based on artificial neuralnetworks. We demonstrate that a signal recorded by a fluorescence telescope within one time frame mightbe enough to reconstruct the energy of a primary particle with reasonable accuracy using an ensembleof simple convolutional neural networks. Contrary to the conventional approach, reconstruction of theshower geometry is not needed for this. More than this, preliminary estimates can be obtained even withoutrecognizing the shower track. However, there remain some problems that do not allow us to claim that thesuggested method is universal and always works. We discuss difficulties that we faced and possible waysof improving the method.
