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Characterizing γ-ray sources with HAL (HAWC Accelerated Likelihood) and 3ML

  • HAWC Collaboration
  • University of Utah
  • Los Alamos National Laboratory
  • Universidad Nacional Autónoma de México
  • Universidad Autonoma de Chiapas
  • Universidad Michoacana de San Nicolas de Hidalgo
  • Pennsylvania State University
  • Michigan Technological University
  • Polish Academy of Sciences
  • NASA Goddard Space Flight Center
  • University of Rochester
  • University of Maryland, College Park
  • Instituto Nacional de Astrofisica Optica y Electronica
  • Instituto Politécnico Nacional
  • Benemerita Universidad Autonoma de Puebla
  • Universidad de Guadalajara
  • University of Wisconsin-Madison
  • Catholic University of America
  • National Aeronautics and Space Administration
  • Instituto Tecnologico de Estudios Superiores de Monterrey

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

The open-source Multi-Mission Maximum likelihood (3ML) Framework allows for the common analysis of diverse datasets. The ability to consistently fit and characterize astronomical data across many decades in energy is key to understanding the origin of the emission we measure with many different instruments. 3ML uses plugins to encapsulate the interfaces to data and instrument response functions. The user can then define a model with one or multiple sources to describe a given region of interest. The model is fit to the data to determine the locations, spatial shapes, and energy spectra of the sources in the model. The High Altitude Water Cherenkov (HAWC) Observatory, a wide FoV instrument sensitive to energies from 300 GeV to above 100 TeV, has used 3ML for data analysis for several years using a plugin optimized for single source analysis. As multisource fitting became more common, a faster plugin was required. Spectral fits to the Crab Nebula and the nearby source HAWC J0543+233 obtained using HAL, the HAWC plugin for 3ML, will be presented.

Original languageEnglish
Article number828
JournalProceedings of Science
Volume395
StatePublished - 18 Mar 2022
Event37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany
Duration: 12 Jul 202123 Jul 2021

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