J/AJ/166/196ivo://CDS.VizieR/J/AJ/166/196doi:10.26093/cds/vizier.51660196CDSDuvvuri G.M.Cauley P.W.Aguirre F.C.Kilgard R.France K.,Berta-Thompson Z.K.Pineda J.S.2024-11-06T20:18:11Z2024-04-24T09:17:17ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-astronomyspectroscopyvisible-astronomyultraviolet-astronomyx-ray-sourcesV1298 Tau is a young pre-main-sequence star hosting four known exoplanets that are prime targets for transmission spectroscopy with current-generation instruments. This work pieces together observations from the NICER X-ray telescope, the Space Telescope Imaging Spectrograph and Cosmic Origins Spectrograph instruments aboard Hubble Space Telescope, and empirically informed models to create a panchromatic spectral energy distribution for V1298 Tau spanning 1-105{AA}. We describe the methods and assumptions used to assemble the panchromatic spectrum and show that despite this star's brightness, its high-energy spectrum is near the limit of present X-ray and ultraviolet observatories' abilities to characterize. We conclude by using the V1298 Tau spectrum as a benchmark for the activity saturation stage of high-energy radiation from solar-mass stars to compare the lifetime cumulative high-energy irradiation of the V1298 Tau planets to other planets orbiting similarly massive stars.2023AJ....166..196Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/196CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+AS/125/149 : CHIANTI An Atomic Database For Emission Lines I. (Dere+ 1997)J/A+A/416/281 : X-ray spectra of 4 cool stars (Sanz-forcada+, 2004)J/ApJ/743/48 : Stars with rot periods and X-ray luminosities (Wright+, 2011)J/ApJ/756/171 : HST far-UV survey of H2 emission of TTau stars (France+, 2012)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)J/AJ/164/110 : HST/COS far-UV spectra AUMicroscopii flares (Feinstein+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/196https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/196http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/196https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/196https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/196http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/196GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-rayUVOpticalInfrareddefaultJ/AJ/166/196/table1Summary of NICER and HST observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTelTelescope usedinstr.setupcharInstInstrument settinginstr.setupcharObs[2020/2022] UT year of observationtime.epoch;obsObs.HUT hour of observationhtime.epochintObs.mUT minute of observationmintime.epochintTexp[1880/21924] Exposure timestime.duration;obs.exposureintlambda1[5/1600] Starting wavelength (angstrom)0.1nmtime.start;em.wlintlambda2[55/3150] Ending wavelength (angstrom)0.1nmtime.end;em.wlintRes[0.09/3] Resolution (1)0.1nmspect.resolutionfloatJ/AJ/166/196/fig1The composite spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWave[1/499965] Wavelength; Angstroms1e-13mem.wldoubleFlux[-4e-16/5e-13] Flux density; erg/s/cm^2^/AngstromcW.m**-2.nm**-1phot.fluxdoublee_Flux[0/2e-13] Lower uncertainty in FluxcW.m**-2.nm**-1stat.error;phot.fluxfloatE_Flux[0/2e-13] Upper uncertainty in FluxcW.m**-2.nm**-1stat.error;stat.maxfloatSourceData source (1)meta.id;instrchar