J/ApJ/931/7ivo://CDS.VizieR/J/ApJ/931/7doi:10.26093/cds/vizier.19310007CDSBoyce H.Haggard D.Witzel G.Von Fellenberg S.Willner S.P.,Becklin E.E.Do T.Eckart A.Fazio G.G.Gurwell M.A.Hora J.L.,Markoff S.Morris M.R.Neilsen J.Nowak M.Smith H.A.Zhang S.2022-08-26T08:17:31Z2022-08-02T06:56:32ZCDS support team

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

cds-question@unistra.frblack-holesinfrared-astronomyspectroscopyradio-spectroscopyx-ray-sourcesWe report a timing analysis of near-infrared (NIR), X-ray, and submillimeter data during a 3 day coordinated campaign observing Sagittarius A*. Data were collected at 4.5um with the Spitzer Space Telescope, 2-8keV with the Chandra X-ray Observatory, 3-70keV with NuSTAR, 340GHz with ALMA, and 2.2um with the GRAVITY instrument on the Very Large Telescope Interferometer. Two dates show moderate variability with no significant lags between the submillimeter and the infrared at 99% confidence. A moderately bright NIR flare (F_K_~15mJy) was captured on July 18 simultaneous with an X-ray flare (F_2-10keV_~0.1counts/s) that most likely preceded bright submillimeter flux (F_340 GHz_~5.5Jy) by about 34_-33^+14^ minutes at 99% confidence. The uncertainty in this lag is dominated by the fact that we did not observe the peak of the submillimeter emission. A synchrotron source cooled through adiabatic expansion can describe a rise in the submillimeter once the synchrotron self-Compton NIR and X-ray peaks have faded. This model predicts high GHz and THz fluxes at the time of the NIR/X-ray peak and electron densities well above those implied from average accretion rates for Sgr A*. However, the higher electron density postulated in this scenario would be in agreement with the idea that 2019 was an extraordinary epoch with a heightened accretion rate. Since the NIR and X-ray peaks can also be fit by a nonthermal synchrotron source with lower electron densities, we cannot rule out an unrelated chance coincidence of this bright submillimeter flare with the NIR/X-ray emission.2022ApJ...931....7Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/931/7CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/755/90 : [NeII] emission line observations from SgrA WestJ/MNRAS/428/2731 : SgrA* emission at 7mm (Beaklini+, 2013)J/A+A/582/A118 : OH-streamer in SgrA at 1665 and 1667MHz (Karlsson+, 2015)J/ApJ/820/90 : 4yr 1.3mm VLBI observations of SgrA* with EHT (Fish+, 2016)J/A+A/618/A35 : ALMA images of the CND and SgrA* (Goicoechea+, 2018)J/A+A/618/L10 : SgrA* orbital motions with GRAVITYJ/ApJ/863/15 : Spitzer, VLT and Keck NIR light curves of SgrA*J/A+A/621/A119 : SgrA* and NRAS530 86GHz images (Brinkerink+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/931/7https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/931/7http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/931/7https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/931/7https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/931/7http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/931/7GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.2528636539047236e-22 9.029278742763022e-20X-rayInfraredMillimeterRadiodefaultJ/ApJ/931/7/0718almaALMA data for 2019/07/18-19recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMinutesMinutes since first observation in seriesmintime.epochdoubleMJDModified Julian Datedtime.epochdoubleBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxALMA 340GHz Sgr A* flux densityJyphot.flux.density;em.mm.200-400GHzdoubleJ/ApJ/931/7/0718chanChandra data for 2019/07/18-19recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxChandra 2-8keV Sgr A* flux in counts/sct/sphot.flux;em.X-rayfloate_FluxSgr A* flux uncertainty in counts/sct/sstat.error;phot.fluxfloatJ/ApJ/931/7/0718gravGRAVITY data for 2019/07/18-19recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxGRAVITY 2.2um Sgr A* flux densitymJyphot.mag;em.IR.Kfloate_FluxSgr A* flux density uncertaintymJystat.error;phot.fluxfloatJ/ApJ/931/7/0718nustNuSTAR data for 2019/07/18-19recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxNuSTAR 3-70keV Sgr A* flux in counts/sct/sphot.flux;em.X-rayfloate_FluxSgr A* flux uncertainty in counts/sct/sstat.error;phot.fluxfloatJ/ApJ/931/7/0718sptzSpitzer/IRAC data for 2019/07/18-19recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxESpitzer 4.5um Sgr A* excess flux densityJyphot.mag;em.IR.4-8umdoubleFlux3.5Spitzer 4.5um Flux density binned over 3.5 minute intervalJyphot.mag;em.IR.4-8umdoubleJ/ApJ/931/7/0721almaALMA data for 2019/07/21recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMinutesMinutes since first observation in seriesmintime.epochdoubleMJDModified Julian Datedtime.epochdoubleBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxALMA 340GHz Sgr A* flux densityJyphot.flux.density;em.mm.200-400GHzdoubleJ/ApJ/931/7/0721chanChandra data for 2019/07/21recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxChandra 2-8keV Sgr A* flux in counts/sct/sphot.flux;em.X-rayfloate_FluxSgr A* flux uncertainty in counts/sct/sstat.error;phot.fluxfloatJ/ApJ/931/7/0721sptzSpitzer/IRAC data for 2019/07/21recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxESpitzer 4.5um Sgr A* excess flux densityJyphot.mag;em.IR.4-8umdoubleFlux3.5Spitzer 4.5um Flux density binned over 3.5 minute intervalJyphot.mag;em.IR.4-8umdoubleJ/ApJ/931/7/0726almaALMA data for 2019/07/26recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMinutesMinutes since first observation in seriesmintime.epochdoubleMJDModified Julian Datedtime.epochdoubleBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxALMA 340GHz Sgr A* flux densityJyphot.flux.density;em.mm.200-400GHzdoubleJ/ApJ/931/7/0726chanChandra data for 2019/07/26recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxChandra 2-8keV Sgr A* flux in counts/sct/sphot.flux;em.X-rayfloate_FluxSgr A* flux uncertainty in counts/sct/sstat.error;phot.fluxfloatJ/ApJ/931/7/0726sptzSpitzer/IRAC data for 2019/07/26recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBMJDBarycentric Modified Julian Datedtime.epochdoubleFluxESpitzer 4.5um Sgr A* excess flux densityJyphot.mag;em.IR.4-8umdoubleFlux3.5Spitzer 4.5um Flux density binned over 3.5 minute intervalJyphot.mag;em.IR.4-8umdouble