Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 61: Gamma Astronomy I

T 61.1: Talk

Wednesday, March 18, 2026, 16:15–16:30, KS 00.005

MSH 15-52 in the high-energy regime: Exploring 3D eROSITA and H.E.S.S. data in a joint analysis with Gammapy — •Katharina Egg and Alison Mitchell for the H.E.S.S. collaboration — Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen Nürnberg

The pulsar wind nebula (PWN) MSH 15-52 is a fascinating system. It is not only a bright and prominent source in TeV gamma-rays, as seen by the H.E.S.S. telescope array, but is also visible in GeV gamma-rays with Fermi-LAT, as well as in X-ray data at keV energies. By characterizing the multiwavelength spectral energy distribution of MSH 15-52 we can draw conclusions about this PWN and its underlying physics.

In this vein, we present a multiwavelength analysis of MSH 15-52, using X-ray data from the eROSITA telescope, as well as H.E.S.S. data. Using 3D eROSITA data -- comprising one spectral and two spatial dimensions -- which we import into the open source analysis software Gammapy, enables us to conduct a joint analysis at photon event level over 12 orders of magnitude in energy, painting a comprehensive picture of this PWN in three dimensional data. We investigate different spectral and spatial models, test for energy-dependent morphology, and draw conclusions on the underlying particle spectrum of the source.

In this talk our current progress with the analysis will be illustrated and an outlook towards the future investigation of MSH 15-52 will be given.

Keywords: Gammapy; X-ray astronomy; Gamma-ray astronomy; H.E.S.S.; Pulsar wind nebulae