J/A+A/618/A22ivo://CDS.VizieR/J/A+A/618/A22doi:10.26093/cds/vizier.36180022CDSPrincipe G.Malyshev D.Ballet J.Funk S.2020-09-01T13:28:49Z2018-10-08T09:28:20ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgamma-ray-astronomysurveysWe present the first Fermi Large Area Telescope (LAT) low energy catalog (1FLE) of sources detected in the energy range 30-100MeV. The imaging Compton telescope (COMPTEL) onboard NASA's Compton Gamma-Ray Observatory detected sources below 30MeV, while catalogs of point sources released by the Fermi-LAT and EGRET collaborations use energies above 100MeV. Because the Fermi LAT detects gamma rays with energies as low as 20MeV, we create a list of sources detected in the energy range between 30 and 100MeV, which closes a gap of point source analysis between the COMPTEL catalog and the Fermi-LAT catalogs. One of the main challenges in the analysis of point sources is the construction of the background diffuse emission model. In our analysis, we use a background-independent method to search for point-like sources based on a wavelet transform implemented in the PGWave code. The 1FLE contains 198 sources detected above 3{sigma} significance with eight years and nine months of the Fermi-LAT data. For 187 sources in the 1FLE catalog we have found an association in the Fermi-LAT 3FGL catalog: 148 are extragalactic, 22 are Galactic, and 17 are unclassified in the 3FGL. The ratio of the number of flat spectrum radio quasars (FSRQ) to BL Lacertae (BL Lacs) in 1FLE is three to one, which can be compared with an approximately 1 to 1 ratio for the 3FGL or a one to six ratio for 3FHL. The higher ratio of the FSRQs in the 1FLE is expected due to generally softer spectra of FSRQs relative to BL Lacs. Most BL Lacs in 1FLE are of low-synchrotron peaked blazar type (18 out of 31), which have softer spectra and higher redshifts than BL Lacs on average. Correspondingly, we find that the average redshift of the BL Lacs in 1FLE is higher than in 3FGL or 3FHL. There are 11 sources that do not have associations in the 3FGL. Most of the unassociated sources either come from regions of bright diffuse emission or have several known 3FGL sources in the vicinity, which can lead to source confusion. The remaining unassociated sources have significance less than 4{sigma}.2018A&A...618A..22Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/618/A22CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010)J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)J/A+AS/143/145 : First COMPTEL source catalogue (Schoenfelder+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/618/A22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/618/A22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/618/A22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/618/A22https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/618/A22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/618/A22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/618/A22/catalog (Fermi Large Area Telescope (LAT) low energy catalog (1FLE) of sources detected in the energy range 30-100MeV)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/618/A22/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/618/A22/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/618/A22/catalog?GETtext/xml+votable180.050000true128.93666111-45.120628060.0055555555555555566/108 438 512 579 885 911 1310 1360 1605 1701 1934 2089 2228 2331 2411 2836 3039 3155 3308 3715 3819 3846 3886 4695 4822 5162 5363 5404 5423 5446 5458 5596 5811 6506 6778 7255 7446 7630 7896 7969 8060 8385 8831 9075 9461 9723 10251 10422 10523 10681 10995 11178 11529 11631 11644 11880 12117 12466 12604 13367 13582 13710 13927 14070 14299 14412 14688 14851 15065 15310 15492 15638 15701 15805 15974 16049 16051 16273 17186 17858 18035 18460 18626 18715 19395 19620 20099 20225 21121 21404 21438 21555 21599 21664 21934 22065 22161 22252 22267 22867 22917 22950 23021 23099 23124 23527 23690 23952 24184 24608 24794 24819 24845 24863 25196 25649 25818 25857 26131 26292 26893 27061 27311 27328 27633 28083 28345 28479 28517 28916 29016 29072 30218 30256 30319 30594 30623 30719 30829 31674 31912 33094 33549 33774 34015 34122 34259 34485 34517 34530 34592 35079 35476 35706 35823 36088 36157 36554 38081 38716 38796 39235 39889 40265 40501 40762 41072 41814 42224 42373 42440 42903 42980 43040 43262 43366 43905 44069 44155 44245 44902 45084 45167 45491 45774 45909 45970 46053 46307 46369 46445 46728 46964 47011 47151 47540 48843 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/618/A22?format=asciiGamma-raydefaultJ/A+A/618/A22/catalogFermi Large Area Telescope (LAT) low energy catalog (1FLE) of sources detected in the energy range 30-100MeVrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameOfficial source name 1FLE JHHMM+DDMM (Source_Name)meta.id;meta.maincharRAJ2000Right Ascension (J2000) (RAJ2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (DEJ2000)degpos.eq.dec;meta.mainGLONGalactic Longitude (GLON)degpos.galactic.lonGLATGalactic Latitude (GLAT)degpos.galactic.latdoubleePosError radius at 95% confidence (Conf_95_Radius)degstat.error;phys.angSizedoubleSigniSource significance in sigma units over the 30MeV to 100MeV band (Signif_Avg)stat.fit.goodnessfloatEF30-100Energy flux (nuF_nu_) from 30MeV to 100MeV (Energy_Flux30_100)mW.m**-2phot.flux.density;em.gamma.harddoublee_EF30-1001 sigma error on energy flux (nuF_nu_) from 30MeV to 100MeV (Unc_Energy_Flux30_100)mW.m**-2stat.errordoubleEF100-300Energy flux (nuF_nu_) from 100 to 300 MeV (Energy_Flux100_300)mW.m**-2phot.flux.density;em.gamma.harddoublee_EF100-3001 sigma error on energy flux (nuF_nu_) from 100MeV to 300MeV (Unc_Energy_Flux100_300)mW.m**-2stat.errordoubleF30-100Photon flux from 30MeV to 100MeV (Flux30_100)cm**-2.s**-1phot.flux.density;em.gamma.harddoublee_F30-1001 sigma error on photon flux from 30MeV to 100MeV (Unc_Flux30_100)cm**-2.s**-1stat.errordoubleF100-300Photon flux from 100 to 300MeV (Flux100_300)cm**-2.s**-1phot.flux.density;em.gamma.harddoublee_F100-3001 sigma error on photon flux from 100MeV to 300MeV (Unc_Flux100_300)cm**-2.s**-1stat.errordoubleClass1Class designation for the associated source in the 3FGL catalog, J/ApJS/218/23 (CLASS1)meta.idcharzRedshift for the associated source in the 3LAC catalog, J/ApJS/218/23 (Redshift)src.redshiftdoubleAssoc1Name of identified or likely associated sources in the 3FGL catalog, J/ApJS/218/23 (ASSOC1)meta.id.assoccharAssoc3FGLAssociated source in the 3FGL catalog, J/ApJS/218/23 (ASSOC_3FGL)meta.id.assoccharAssocCOMPAssociated source in the first COMPTEL catalog, J/A+AS/143/145 (ASSOC_COMPTEL)meta.id.assoccharSimbadSimbad column added by the CDSmeta.ref.urlchar