Galactic Diffuse Emission Spectrum between 0.5 and 8.0 MeV and between 30 keV and 8 MeV for the search of PBH and Light Dark Matter

Spectra and response files of the soft gamma-ray spectrum from Inverse Compton scattering in the Milky Way between 0.5 and 8.0 MeV, measured with INTEGRAL/SPI. The fluxes have been extracted with spimodfit assuming GALPROP v56 models according to Voyager 1, AMS-02, and Fermi/LAT data, plus different variants to change the interstellar radiation field, the diffusion properties, or the cosmic-ray halo size (Siegert et al., 2022). The respective galdef files are included. In particular: voyager: propagation model of Bisschoff et al. (2019), Table 2 voyager_Dg10001: \(\delta_1 = 0\) voyager_Dg1Dg205: \(\delta_1 = \delta_2 = 0.5\) voyager_ISRFopt10: factor 10 stronger optical ISFR voyager_z8kpc_KL: thick halo with 8 kpc half-thickness In addition, there are spectra from 30 keV to 8 MeV (spec_0030-8000keV_<name>.fits, Berteaud et al., 2022), separated into: CV: spectrum of unresolved point sources in the Galactic plane, mostly cataclysmic variables (strong systematics) IC: spectrum of Inverse Compton scattering of cosmic ray GeV electrons (see above) positronium: spectrum of positronium decay (annihilation of electrons with positrons after intermediate bound state) NFW: spectrum of dark matter contributions that would follow a Navarro Frenk White density profile (mostly consistent with zero) total: spectrum of the above combined The notebooks for dark matter related bounds when using this data as well as auxiliary files to create the templates are given as (Berteaud et al., 2022, Calore et al., 2023): DM_fsr.ipynb: Notebook for final state radiation bounds DM_fsr.py: astromodels function for final state radiation spectrum DM_2gamma.ipynb: Notebook for gamma gamma final state bounds DM_2gamma.py: astromodels function for gamma gamma spectrum Positronium_Spectrum.py: astromodels function for Positonium spectrum DM_pbh.py: script for obtaining PBH bounds diff_@@.csv: spectra for PBH evaporation total_spectrum.fits.gz: total Galactic spectrum NFW_spectrum.fits.gz: NFW-only spectrum