A catalog of gamma-ray source candidates from 16 years of Fermi-LAT data at | <i>b</i> | &gt; 10°

Context . Sixteen years of continuous observations with the Fermi Large Area Telescope (LAT) provide an unprecedented opportunity to search for faint or previously unrecognized γ-ray emitters, particularly at high energies where the angular resolution improves and the diffuse background is reduced. Aims . We present a new catalog of γ-ray source candidates identified using a data-driven, clustering-based analysis of Pass 8 LAT data above 3 GeV at Galactic latitudes of | b | &gt; 10°. Methods . The pipeline integrates the SIeving MEthod for FInding Core, version 3 (SIMEFIC III), for photon denoising with the density-based spatial clustering of applications with noise (DBSCAN) algorithm. Results . We detect 3112 γ-ray cluster candidates, of which 2932 are associated with known γ-ray sources. Crossmatching yields 37 counterparts in 1CGH, 23 in CRATES, 21 in Roma-BZCAT, and 17 in MST-12yr. The remaining 370 clusters have no known γ-ray counterpart and are proposed as new source candidates.

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Publication Details

Journal
Astronomy and Astrophysics
Published
2026-01-29
DOI
https://doi.org/10.1051/0004-6361/202556902
Primary Topic
Astrophysics and Cosmic Phenomena
Type
article
Field-Weighted Citation Impact
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article

A catalog of gamma-ray source candidates from 16 years of Fermi-LAT data at | b | > 10°

M. Soor, H. Hedayati Kh., F. Akhondi
Astronomy and Astrophysics
Astrophysics and Cosmic Phenomena
article

A catalog of gamma-ray source candidates from 16 years of Fermi-LAT data at | b | > 10°

M. Soor, H. Hedayati Kh., F. Akhondi
article en

Abstract

Context . Sixteen years of continuous observations with the Fermi Large Area Telescope (LAT) provide an unprecedented opportunity to search for faint or previously unrecognized γ-ray emitters, particularly at high energies where the angular resolution improves and the diffuse background is reduced. Aims . We present a new catalog of γ-ray source candidates identified using a data-driven, clustering-based analysis of Pass 8 LAT data above 3 GeV at Galactic latitudes of | b | &gt; 10°. Methods . The pipeline integrates the SIeving MEthod for FInding Core, version 3 (SIMEFIC III), for photon denoising with the density-based spatial clustering of applications with noise (DBSCAN) algorithm. Results . We detect 3112 γ-ray cluster candidates, of which 2932 are associated with known γ-ray sources. Crossmatching yields 37 counterparts in 1CGH, 23 in CRATES, 21 in Roma-BZCAT, and 17 in MST-12yr. The remaining 370 clusters have no known γ-ray counterpart and are proposed as new source candidates.

Astronomy and AstrophysicsVol. 707
K. N. Toosi University of Technology (IR)
Openalex Percentile: Top 70%
Astrophysics and Cosmic Phenomena
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