J/ApJ/657/706ivo://CDS.VizieR/J/ApJ/657/706doi:10.26093/cds/vizier.16570706CDSNandikotkur G.Jahoda K.M.Hartman R.C.Mukherjee R.Sreekumar P.,Bottcher M.Sambruna R.M.Swank J.H.2017-10-13T15:41:41Z2009-03-13T15:58:44ZCDS support team

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

cds-question@unistra.frquasarsbl-lacertae-objectsgamma-ray-astronomyThe Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Gamma-Ray Observatory (CGRO) discovered gamma-ray emission from more than 67 blazars during its 9yr lifetime. We conducted an exhaustive search of the EGRET archives and selected all the blazars that were observed multiple times and were bright enough to enable a spectral analysis using standard power-law models. The sample consists of 18 flat-spectrum radio quasars (FSRQs), 6 low-frequency peaked BL Lac objects (LBLs) and 2 high-frequency peaked BL Lac objects (HBLs). We do not detect any clear pattern in the variation of spectral index with flux. Some of the blazars do not show any statistical evidence for spectral variability.2007ApJ...657..706Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/657/706CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/123/79 : Third EGRET catalog (3EG) (Hartman+, 1999)J/A+A/489/849 : Revised catalogue of EGRET gamma-ray sources (Casandjian+ 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/657/706https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/657/706http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/657/706https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/657/706https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/657/706http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/657/706GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/657/706/table2 (Photon Spectral index (30MeV-10GeV), average flux (>100MeV) and Log(synchrotron peak frequency) of blazars detected by EGRET)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/657/706/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/657/706/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/657/706/table2?GETtext/xml+votable180.050000true19.62.810.0055555555555555566/556 579 909 1128 1262 2414 4695 4822 5423 5816 5847 6069 6640 6646 7004 7255 7576 7896 7947 8514 9442 9460 9612 10064 10250 12467 12671 13687 13927 15567 15763 17411 18208 18718 19398 20097 20122 20224 20472 20647 21035 21324 21431 21769 21974 22517 22917 22947 23022 23099 23121 23410 24081 25214 25625 25864 26118 26131 26245 26297 26342 26620 28083 28479 28493 28675 29009 29016 29072 29570 29714 31044 31190 31665 33827 34123 34178 34260 35078 36187 40762 41046 42901 42980 43262 43366 43819 44244 44813 44908 46055 46964 47014 47375 47531 47648 48685 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/657/706?format=asciiGamma-raydefaultJ/ApJ/657/706/table2Photon Spectral index (30MeV-10GeV), average flux (>100MeV) and Log(synchrotron peak frequency) of blazars detected by EGRETrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (HHMM+DDd or HHMM+DDMM) QSO BHHMM+DDd in Simbadmeta.id;meta.maincharprimaryn_Name[*] 0804+499 also named 0809+483meta.notecharu_Name[?] Possible EGRET identification?meta.code.errorcharRAJ2000Right Ascension decimal degrees (J2000) (2)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (2)degpos.eq.dec;meta.mainalpha? Spectral index (G1)spect.indexfloatnullablee_alpha? Uncertainty in alphastat.error;pos.eq.rafloatnullablef_alpha[e] alpha during a flare (4)meta.codecharFluxAverage flux at >100MeV (G2)0.0001m**-2.s**-1phot.flux.density;em.gamma.hardfloate_FluxUncertainty in Flux (G2)0.0001m**-2.s**-1stat.error;phot.fluxfloatlognu? Log of the synchrotron peak frequency (6)log(Hz)em.freq;stat.maxfloatnullablee_lognu? Uncertainty in lognulog(Hz)stat.errorfloatnullableM[Y/N] Multiple observations? (7)meta.codecharClassClassification (8)meta.code.classcharSimbadSimbad column added by the CDScharONameOther namemeta.idcharJ/ApJ/657/706/table3Gamma-ray photon spectral index (30MeV-10GeV) and flux (>100MeV) of blazars that were bright and were observed multiple times by EGRETrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (HHMM+DDd or HHMM+DDMM) QSO BHHMM+DDd in Simbad (1)meta.id;meta.maincharDatesStart date(s)time.startcharPeriodViewing periods pooledmeta.notecharFig3Graph label in Figure 3 (2)meta.bib.figcharf_Fig3[b] Fraction of the viewing period (3)meta.codecharalpha? Spectral Index (G1)spect.indexfloatnullablee_alpha? Uncertainty in alphastat.error;pos.eq.rafloatnullableFlux? Mean flux at >100MeV (G2)0.0001m**-2.s**-1phot.flux.density;em.gamma.hardfloatnullablee_Flux? Uncertainty in Flux (G2)0.0001m**-2.s**-1stat.error;phot.fluxfloatnullablesigma? Detection significancestat.fit.goodnessfloatnullableONameOther namemeta.idchar