Search for Gamma-ray emission from Abell 119 galaxy cluster using INTEGRAL/ISGRI, COMPTEL, and DAMPE data

We present a comprehensive search for non-thermal high-energy $\gamma$-ray emission from the nearby merging galaxy cluster Abell~119 ($z=0.044$) using archival observations spanning over seven decades in photon energy. Our analysis combines hard X-ray data from INTEGRAL/ISGRI (30–100~keV), MeV $\gamma$-ray observations from COMPTEL (0.75–30~MeV), and GeV–TeV data from the DArk Matter Particle Explorer (DAMPE; 3~GeV–1~TeV). No statistically significant emission is detected at the cluster position in any energy band. In the hard X-ray regime, we derive a $3\sigma$ upper limit of $F_{30-100\mathrm{k}\mathrm{e}\mathrm{V}}\lesssim 8.5\times {10}^{-11}$~erg~cm${}^{-2}$~s${}^{-1}$ from ISGRI mosaic imaging. Reanalysis of archival COMPTEL data yields 95% confidence-level upper limits ranging from $\sim 9\times {10}^{-11}$ to $\sim 8\times {10}^{-10}$~erg~cm${}^{-2}$~s${}^{-1}$ across 0.75–30~MeV. In the GeV–TeV range, DAMPE constrains the differential energy flux to $\sim {10}^{-12}$–${10}^{-10}$~erg~cm${}^{-2}$~s${}^{-1}$ (95% confidence level). These results provide independent multi-band constraints on the reported GeV excess from recent Fermi-LAT studies. While our DAMPE limits do not exclude the flux levels claimed in those analyses, the absence of confirmation across keV–MeV–GeV bands indicate that any non-thermal emission from Abell~119 remains tentative.