J/ApJS/123/79ivo://CDS.VizieR/J/ApJS/123/79doi:10.26093/cds/vizier.21230079CDSHartman R.C.Bertsch D.L.Bloom S.D.Chen A.W.Deines-Jones P.,Esposito J.A.Fichtel C.E.Friedlander D.P.Hunter S.D.,McDonald L.M.Sreekumar P.Thompson D.J.Jones B.B.Lin Y.C.,Michelson P.F.Nolan P.L.Tompkins W.F.Kanbach G.,Mayer-Hasselwander H.A.Mucke A.Pohl M.Reimer O.Kniffen D.A.,Schneid E.J.Von Montigny C.Mukherjee R.Dingus B.L.2018-01-31T06:09:53Z2006-09-14T19:48:49ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomyThe third catalog of high-energy gamma-ray sources detected by the EGRET telescope on the Compton Gamma Ray Observatory (3EG) includes data from 1991 April 22 to 1995 October 3 (cycles 1, 2, 3, and 4 of the mission). In addition to including more data than the second EGRET catalog and its supplement, this catalog uses completely reprocessed data to correct a number of mostly minimal errors and problems. 14 sources (3 from the Supplement) listed in Table 6 below are not appearing in the 3EG. The 271 sources (E>100 MeV) in the catalog include the single 1991 solar flare bright enough to be detected as a source, the Large Magellanic Cloud, five pulsars, one probable radio galaxy detection (Cen A), and 66 high-confidence identifications of blazars (BL Lac objects, flat-spectrum radio quasars, or unidentified flat-spectrum radio sources). In addition, 27 lower confidence potential blazar identifications are noted. Finally, the catalog contains 170 sources not yet identified firmly with known objects, although potential identifications have been suggested for a number of those. This catalog supersedes the 2EG (Cat. <J/ApJS/101/259>) and its supplement (Cat. <J/ApJS/107/227>).1999ApJS..123...79Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/123/79CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/101/259 : The second EGRET catalog (Thompson+ 1995)J/ApJS/107/227 : Supplement to Second EGRET Catalog (Thompson+ 1996)http://cossc.gsfc.nasa.gov/cossc/egret/ : EGRET catalogshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/123/79https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/123/79http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/123/79https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/123/79https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/123/79http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/123/79GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/123/79/3eg (Third EGRET Source Catalog (table 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/123/79/3eg?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/123/79/3eg?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/123/79/3eg?GETtext/xml+votable180.050000true2.5673.170.005555555555555556Cone search capability for table J/ApJS/123/79/table1 (EGRET Viewing Periods)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/123/79/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/123/79/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/123/79/table1?GETtext/xml+votable180.050000true86.758622.09090.005555555555555556CGRO6/173 332 437 515 556 579 594 909 1128 1131 1143 1221 1223 1262 1362 1487 1501 1562 1677 1728 1985 2414 2939 3089 3145 3308 3356 3649 3819 4695 4822 4976 5314 5423 5462 5575 5816 5847 6069 6640 6646 6822 7004 7255 7555 7566 7576 7592 7657 7863 7869 7882 7896 7947 7953 8213 8392 8514 9437 9442 9460 9512 9648 9989 10064 10201 10250 10340 10527 10910 10926 11075 12066 12241 12283 12441 12467 12671 13197 13687 13768 13927 14283 14413 14424 14428 14609 14622 14636 14641 14688 14690 14693 14702 14707 14831 15309 15310 15502 15567 15646 15730 15763 15968 16464 16518 17236 17411 17742 18208 18394 18496 18718 18930 19020 19283 19398 19420 19455 19626 19883 20052 20097 20110 20122 20224 20472 20552 20647 21035 21324 21368 21429 21431 21561 21769 21974 22252 22255 22517 22850 22877 22917 22947 23000 23022 23099 23121 23310 23406 23410 23433 23502 23518 23547 23588 23754 23792 23801 23802 23952 23960 23995 24081 24154 24181 24185 24260 24263 24269 24283 24302 24346 24451 24452 25022 25069 25214 25596 25625 25834 25864 26118 26129 26131 26245 26257 26269 26292 26310 26314 26342 26385 26464 26620 26983 27652 27677 27727 27754 27765 27767 27960 28083 28092 28433 28479 28493 28671 28675 28735 28767 28809 28825 28827 28830 28848 28875 28894 28912 28935 28964 29002 29009 29016 29072 29117 29190 29235 29249 29254 29261 29311 29324 29374 29469 29490 29505 29538 29539 29570 29593 29615 29641 29692 29714 29731 29746 29836 30112 30241 30247 30319 30388 30594 30600 30716 30724 30726 30746 30783 30807 30843 30860 31002 31044 31113 31190 31255 31291 31665 32131 32589 32637 32756 33046 33100 33221 33302 33497 33616 33827 34023 34123 34178 34260 34776 35078 35304 35718 36187 36839 36958 37341 37361 37367 37538 37553 37566 37722 37768 37803 37822 37878 37887 37928 38017 38081 38143 38354 38400 39034 39131 39197 39198 39235 39239 39241 39248 39265 39545 39746 39962 40406 40762 41003 41046 41340 41573 41621 41654 41663 41681 41685 41833 42143 42224 42237 42356 42368 42376 42384 42435 42441 42486 42495 42515 42753 42807 42839 42898 42901 42935 42949 42954 42980 42981 43118 43252 43262 43359 43366 43425 43596 43609 43778 43782 43819 43880 44058 44244 44331 44357 44629 44813 44908 45134 45219 45373 45759 46055 46279 46757 47014 47107 47470 47493 47531 47633 47648 47805 47862 47895 48270 48685 48845 48855 48874 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/123/79?format=asciiGamma-raydefaultJ/ApJS/123/79/3egThird EGRET Source Catalog (table 4)l_z[>= ~] Limit flag on zmeta.code.error;src.redshiftcharz? Redshift (AGNs only)src.redshiftfloatnullableu_z[?] Uncertainty flag on zmeta.code.error;src.redshiftcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint3EG3EG name (Jhhmm+ddmm)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloattheta95Radius of the circle containing the same solid angle as the 95% confidence contourdegpos.posAngfloatn_theta95[*] *: value was obtained by multiplying the 68% radius by 1.62. This was necessary in cases of unclosed or extremely irregular 95% contours.meta.notecharFFlux (E>100MeV) (4)1e-08ph.cm**-2.s**-1phot.flux.density;em.gamma.hardfloate_F? rms uncertainty on F ({DELTA}F) (4)1e-08ph.cm**-2.s**-1stat.errorfloatnullableSp-Index? Photon spectral index in F(E)~E^-Sp-Index^spect.indexfloatnullablee_Sp-Index? rms uncertainty on Sp-Indexstat.errorfloatnullablen_Sp-Index[BF] B: Break, F: Featuresmeta.notecharID[PGSAa] Identification code (1)src.classcharNote[@EemC, ] Notes (2)meta.notecharr_IDReferences detailed in file "refs.dat"meta.ref;pos.framecharOtherNamesOther names (3)meta.idcharJ/ApJS/123/79/fluxesThird EGRET Source Catalog, fluxes (table 4)l_CountLimit flag on Countmeta.code.error;phot.countcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint3EG3EG name (Jhhmm+ddmm)meta.id;meta.maincharn_3EG[*] *: Maximum flux detectedmeta.notecharl_FLimit flag on F (95% confidence upper limit for (TS)^1/2^<2)meta.code.errorcharFFlux (E>100MeV) (1)1e-08ph.cm**-2.s**-1phot.flux.density;em.gamma.hardfloate_F? rms uncertainty on F ({DELTA}F)1e-08ph.cm**-2.s**-1stat.errorfloatnullableCountNumber of >100 MeV photons represented by the flux or upper limit.ctphot.count;em.X-rayintTS1/2Statistical significance of the >100 MeV detection.meta.notefloatVPViewing period of the specific catalog line (2)instr.setupcharJ/ApJS/123/79/table1EGRET Viewing PeriodsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVPdViewing period designationinstr.setupfloatStartStarting datetime.startnullableEndEnding datetime.endnullableGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.lat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJS/123/79/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefNoReference numbermeta.ref;pos.frameintTextText of reference, including the 19-digit bibcode.meta.bib.bibcodecharJ/ApJS/123/79/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint3EG3EG name (Jhhmm+ddmm)meta.id;meta.maincharNoteText of the notemeta.notechar