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arxiv: 2308.11436 · v1 · pith:S7K53V5Mnew · submitted 2023-08-22 · 🌌 astro-ph.HE · astro-ph.IM

The cosipy library: COSI's high-level analysis software

Israel Martinez-Castellanos , Savitri Gallego , Chien-You Huang , Chris Karwin , Carolyn Kierans , Jan Peter Lommler , Saurabh Mittal , Michela Negro
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Eliza Neights Sean N. Pike Yong Sheng Thomas Siegert Hiroki Yoneda Andreas Zoglauer John A. Tomsick Steven E. Boggs Dieter Hartmann Marco Ajello Eric Burns Chris Fryer Alexander Lowell Julien Malzac Jarred Roberts Pascal Saint-Hilaire Albert Shih Clio Sleator Tadayuki Takahashi Fabrizio Tavecchio Eric Wulf Jacqueline Beechert Hannah Gulick Alyson Joens Hadar Lazar Juan Carlos Martinez Oliveros Shigeki Matsumoto Tom Melia Mark Amman Dhruv Bal Peter von Ballmoos Hugh Bates Markus B\"ottcher Andrea Bulgarelli Elisabetta Cavazzuti Hsiang-Kuang Chang Claire Chen Che-Yen Chu Alex Ciabattoni Luigi Costamante Lente Dreyer Valentina Fioretti Francesco Fenu Giancarlo Ghirlanda Eric Grove Pierre Jean Nikita Khatiya J\"urgen Kn\"odlseder Martin Krause Mark Leising Tiffany R. Lewis Lea Marcotulli Samer Al Nussirat Kazuhiro Nakazawa Uwe Oberlack David Palmore Gabriele Panebianco Nicolo Parmiggiani Tyler Parsotan Field Rogers Hester Schutte Alan P. Smale Jacob Smith Aaron Trigg Tonia Venters Yu Watanabe Haocheng Zhang
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keywords willcosianalysiscomptoncosipygalacticlibrarydata
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The Compton Spectrometer and Imager (COSI) is a selected Small Explorer (SMEX) mission launching in 2027. It consists of a large field-of-view Compton telescope that will probe with increased sensitivity the under-explored MeV gamma-ray sky (0.2-5 MeV). We will present the current status of cosipy, a Python library that will perform spectral and polarization fits, image deconvolution, and all high-level analysis tasks required by COSI's broad science goals: uncovering the origin of the Galactic positrons, mapping the sites of Galactic nucleosynthesis, improving our models of the jet and emission mechanism of gamma-ray bursts (GRBs) and active galactic nuclei (AGNs), and detecting and localizing gravitational wave and neutrino sources. The cosipy library builds on the experience gained during the COSI balloon campaigns and will bring the analysis of data in the Compton regime to a modern open-source likelihood-based code, capable of performing coherent joint fits with other instruments using the Multi-Mission Maximum Likelihood framework (3ML). In this contribution, we will also discuss our plans to receive feedback from the community by having yearly software releases accompanied by publicly-available data challenges.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Detectability of Polarized Gamma-ray Emission from Blazar Flares with COSI

    astro-ph.HE 2026-05 unverdicted novelty 4.0

    COSI is projected to detect MeV polarization from up to about 6 blazar flares over its two-year mission, mostly flat-spectrum radio quasars, assuming GeV-like flare rates and baseline backgrounds.

  2. Detectability of Polarized Gamma-ray Emission from Blazar Flares with COSI

    astro-ph.HE 2026-05 unverdicted novelty 4.0

    Estimates based on 17 years of Fermi LAT data indicate COSI may detect MeV polarization in a small number of blazar flares, with flat-spectrum radio quasars as the top targets.