SIMBAD references

2024RAA....24j5004X - Research in Astron. and astroph., 24, part no 10, 5004 (2024/October-0)

New γ-Ray Sources Identified in All-sky Surveys Based on Fermipy's Advanced Algorithm.

XIANG Y., FENG P. and LAN X.

Abstract (from CDS):

We employ an efficient method for identifying γ-ray sources across the entire sky, leveraging advanced algorithms from Fermipy, and cleverly utilizing the Galactic diffuse background emission model to partition the entire sky into 72 regions, thereby greatly enhancing the efficiency of discovering new sources throughout the sky through multi-threaded parallel computing. After confirming the reliability of the new method, we applied it for the first time to analyze data from the Fermi Large Area Telescope (Fermi-LAT) encompassing approximately 15.41 yr of all-sky surveys. Through this analysis, we successfully identified 1379 new sources with significance levels exceeding 4σ, of which 497 sources exhibited higher significance levels exceeding 5σ. Subsequently, we performed a systematic analysis of the spatial extension, spectra, and light variation characteristics of these newly identified sources. We identified 21 extended sources and 23 sources exhibiting spectral curvature above 10 GeV. Additionally, we identified 44 variable sources above 1 GeV.

Abstract Copyright: © 2024. National Astronomical Observatories, CAS and IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.

Journal keyword(s): gamma-rays: diffuse background - methods: data analysis - catalogs - gamma-rays: general

VizieR on-line data: <Available at CDS (J/other/RAA/24.J5004): table4.dat table5.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 5

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