Search for Gamma-ray emission from Abell 119 galaxy cluster using INTEGRAL/ISGRI, COMPTEL, and DAMPE data
Abstract
We present a comprehensive search for non-thermal high-energy γ -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 γ -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 σ upper limit of F 30 − 100 k e V ≲ 8.5 × 10 − 11 erg cm s from ISGRI mosaic imaging. Reanalysis of archival COMPTEL data yields 95% confidence-level upper limits ranging from ∼ 9 × 10 − 11 to ∼ 8 × 10 − 10 erg cm s across 0.75–30 MeV. In the GeV–TeV range, DAMPE places upper limits on the differential energy flux to ∼ 10 − 12 – 10 − 10 erg cm s (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 indicates that any non-thermal emission from Abell 119 remains tentative.
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BibTeX
@article{manna2026search,
title = {{Search for Gamma-ray emission from Abell 119 galaxy cluster using INTEGRAL/ISGRI, COMPTEL, and DAMPE data}},
author = {Siddhant Manna and Shantanu Desai},
journal = {The Open Journal of Astrophysics},
year = {2026},
month = oct,
doi = {10.33232/001c.172380},
url = {https://astro.theoj.org/article/172380-search-for-gamma-ray-emission-from-abell-119-galaxy-cluster-using-integral-isgri-comptel-and-dampe-data},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Search for Gamma-ray emission from Abell 119 galaxy cluster using INTEGRAL/ISGRI, COMPTEL, and DAMPE data
AU - Siddhant Manna
AU - Shantanu Desai
PY - 2026
DA - 2026/10/12
JO - The Open Journal of Astrophysics
DO - 10.33232/001c.172380
UR - https://astro.theoj.org/article/172380-search-for-gamma-ray-emission-from-abell-119-galaxy-cluster-using-integral-isgri-comptel-and-dampe-data
AB - We present a comprehensive search for non-thermal high-energy γ -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 γ -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 σ upper limit of F 30 − 100 k e V ≲ 8.5 × 10 − 11 erg cm s from ISGRI mosaic imaging. Reanalysis of archival COMPTEL data yields 95% confidence-level upper limits ranging from ∼ 9 × 10 − 11 to ∼ 8 × 10 − 10 erg cm s across 0.75–30 MeV. In the GeV–TeV range, DAMPE places upper limits on the differential energy flux to ∼ 10 − 12 – 10 − 10 erg cm s (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 indicates that any non-thermal emission from Abell 119 remains tentative.
SN - 2565-6120
ER -