CTbend: A Baysian open-source framework to model pointing corrections of Cherenkov telescopes

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
'The pointing of Cherenkov telescopes is subject to imperfections which are, e.g. related tornthe bending of the mechanical structure. These imperfections must be measured, modeled and finally corrected for tornachieve an optimal telescope pointing precision. The measurement of pointing deviations is typicallyrnperformed while the telescope points to different stars and a CCD camerarnmonitors the offsets of the star images to the center of the focal plane. Outlier in thesernmeasurements can propagate into the pointing model and lead to imprecise model predictions.rnCTbend is a simple and standalone open-source framework which uses a Baysianrnanalysis with an outlier resilient likelihood function to model the pointing of Cherenkovrntelescopes with parametric standard models like TPoint.rnThe framework is in the following described on the basis of simulated data.'

Authors: Gerrit Spengler | Ullrich Schwanke | Dmitriy Zhurov
Indico-ID: 199
Proceeding URL: https://pos.sissa.it/395/699