New gamma-ray sources J/other/RAA/24.J ivo://CDS.VizieR/J/other/RAA/24.J5004 CDS Xiang Y. Feng P. Lam X. 2025-10-01T06:29:29Z 2025-08-28T13:13:30Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr gamma-ray-astronomy We employ an efficient method for identifying gamma-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 4{sigma}, of which 497 sources exhibited higher significance levels exceeding 5{sigma}. 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 10GeV. Additionally, we identified 44 variable sources above 1GeV. 2024RAA....24j5004X https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/24.J5004 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to IX/67 : Incremental Fermi LAT 4th source cat. (4FGL-DR3) (Fermi-LAT col., 2022) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RAA/24.J5004 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RAA/24.J5004 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RAA/24.J5004 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RAA/24.J5004 https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RAA/24.J5004 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RAA/24.J5004 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/other/RAA/24.J5004/table5 (Information on the gamma-ray emissions of all new sources) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RAA/24.J5004/table5? https://vizier.iucaa.in/viz-bin/conesearch/J/other/RAA/24.J5004/table5? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RAA/24.J5004/table5? 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assigned by the VizieR team. Should Not be used for identification. meta.record int Name Source name, 4FGL JHHMM.m+DDMMa meta.id;meta.main char Sig14 The significance level above 100MeV within 14yr stat.fit.goodness float Sig4FGL The significance level above 100MeV within 14yr in 4FGL-DR4 stat.fit.goodness float ratio1 ratio of Ssig14 to sig4FGL stat.fit.param float EFlux14 Energy flux in 4FGL-DR4 mW.m**-2 phot.flux.density;em.gamma.hard double e_EFlux14 1{sigma} error on energy flux in 4FGL-DR4 mW.m**-2 stat.error double EFlux Energy flux above 100 MeV within 14yr mW.m**-2 phot.flux.density;em.gamma.hard double e_EFlux 1{sigma} error on energy flux above 100MeV within 14yr mW.m**-2 stat.error double offsetROI Angular offset from each ROI center deg pos.angDistance float
J/other/RAA/24.J5004/table5 Information on the gamma-ray emissions of all new sources recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name Source name, Fermi JHHMM.m+DDMMa meta.id;meta.main char RAJ2000 Right ascension (J2000) deg pos.eq.ra;meta.main DEJ2000 Declination (J2000) deg pos.eq.dec;meta.main Index Spectral index of powerlaw stat.fit.param float e_Index Spectral index error of powerlaw stat.error;spect.index float Flux Integral photon flux above 0.5GeV cm**-1.s**-1 phot.flux.density;em.gamma.hard double e_Flux Error of integral photon flux above 0.5GeV cm**-1.s**-1 stat.error;phot.flux double Np Predicted number of events in the model above 0.5GeV meta.number float Sig0.5 The significance level above 0.5GeV (in sigma unit) stat.fit.goodness float Sig1 The significance level above 1GeV (in sigma unit) stat.fit.goodness float Sig10 ? The significance level above 10GeV (in sigma unit) stat.fit.goodness float nullable Posr68 Position error at 68% confidence arcsec stat.error;pos float Posr95 Position error at 95% confidence arcsec stat.error;pos float