J/MNRAS/491/655ivo://CDS.VizieR/J/MNRAS/491/655doi:10.26093/cds/vizier.74910655CDSKuin N.P.M.Page K.L.Mroz P.Darnley M.J.Shore S.N.Osborne J.P.,Walter F.Di Mille F.Morrell N.Munari U.Bohlsen T.Evans A.,Gehrz R.D.Starrfield S.Henze M.Williams S.C.Schwarz G.J.,Udalski A.Szymanski M.K.Poleski R.Soszynski I.Ribeiro V.A.R.M.,Angeloni R.Breeveld A.A.Beardmore A.P.Skowron J.2024-08-20T20:15:12Z2020-08-11T09:01:11ZCDS support team

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

cds-question@unistra.frnovaeultraviolet-photometryinfrared-photometryvisible-astronomybroad-band-photometryspectroscopyWe present a comprehensive review of all observations of the eclipsing recurrent Nova LMC 1968 in the Large Magellanic Cloud which was previously observed in eruption in 1968, 1990, 2002, 2010, and most recently in 2016. We derive a probable recurrence time of 6.2+/-1.2yr and provide the ephemerides of the eclipse. In the ultraviolet-optical-IR photometry the light curve shows high variability right from the first observation around 2 d after eruption. Therefore no colour changes can be substantiated. Outburst spectra from 2016 and 1990 are very similar and are dominated by H and He lines longward of 2000{AA}. Interstellar reddening is found to be E(B-V)=0.07+/-0.01. The super soft X-ray luminosity is lower than the Eddington luminosity and the X-ray spectra suggest the mass of the white dwarf (WD) is larger than 1.3M_{sun}_. Eclipses in the light curve suggest that the system is at high orbital inclination. On day 4 after the eruption a recombination wave was observed in FeII ultraviolet absorption lines. Narrow-line components are seen after day 6 and explained as being due to reionization of ejecta from a previous eruption. The UV spectrum varies with orbital phase, in particular a component of the HeII 1640{AA} emission line, which leads us to propose that early-on the inner WD Roche lobe might be filled with a bound opaque medium prior to the re-formation of an accretion disc. Both this medium and the ejecta can cause the delay in the appearance of the soft X-ray source.2020MNRAS.491..655Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/491/655CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/491/655https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/491/655http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/491/655https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/491/655https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/491/655http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/491/655GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/491/655/listimg (List of EROS fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/491/655/listimg?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/491/655/listimg?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/491/655/listimg?GETtext/xml+votable180.050000true77.84251-71.663180.0055555555555555566/33051https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/491/655?format=asciiUVOpticalInfrareddefaultJ/MNRAS/491/655/erosblue*2002 EROS blue photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Day observation timedtime.epochdoublemagUncalibrated EROS instrumental magnitudemagphot.magdoublee_mag? Error in magnitudemagstat.error;phot.magfloatnullableJ/MNRAS/491/655/erosred*2002 EROS red photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Day observation timedtime.epochdoublemagUncalibrated EROS instrumental magnitudemagphot.magdoublee_mag? Error in magnitudemagstat.error;phot.magfloatnullableJ/MNRAS/491/655/phot1968The 1968 photometry (table A3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDObservation time (1)dtime.epochdoublel_mag[>] Upper limit flag on magmeta.code.errorcharmag? Magnitude in Filtermagphot.magfloatnullablee_mag? Error in magnitude (1-sigma)magstat.error;phot.magfloatnullablesystem[AB/VEGA] magnitude systemmeta.codecharFilterName of the filtermeta.id;instr.filtercharPhase? Orbital phasetime.phasefloatnullableSourceName of the observatory/instrument/referencemeta.id;instr.obstycharJ/MNRAS/491/655/phot1990The 1990 photometry (table A3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDObservation time (1)dtime.epochdoublel_mag[>] Upper limit flag on magmeta.code.errorcharmag? Magnitude in Filtermagphot.magfloatnullablee_mag? Error in magnitude (1-sigma)magstat.error;phot.magfloatnullablesystem[AB/VEGA] magnitude systemmeta.codecharFilterName of the filtermeta.id;instr.filtercharPhase? Orbital phasetime.phasefloatnullableSourceName of the observatory/instrument/referencemeta.id;instr.obstycharJ/MNRAS/491/655/phot2016*2016 photometry: SMART, ANS, UVOT (table A3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDObservation time (1)dtime.epochdoublel_mag[>] Upper limit flag on magmeta.code.errorcharmag? Magnitude in Filtermagphot.magfloatnullablee_mag? Error in magnitude (1-sigma)magstat.error;phot.magfloatnullablesystem[AB/VEGA] magnitude systemmeta.codecharFilterName of the filtermeta.id;instr.filtercharPhase? Orbital phasetime.phasefloatnullableSourceName of the observatory/instrument/referencemeta.id;instr.obstycharJ/MNRAS/491/655/photogleThe OGLE V and I photometry 2010-2016recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDObservation time (1)dtime.epochdoublel_mag[>] Upper limit flag on magmeta.code.errorcharmag? Magnitude in Filtermagphot.magfloatnullablee_mag? Error in magnitude (1-sigma)magstat.error;phot.magfloatnullablesystem[AB/VEGA] magnitude systemmeta.codecharFilterName of the filtermeta.id;instr.filtercharPhase? Orbital phasetime.phasefloatnullableSourceName of the observatory/instrument/referencemeta.id;instr.obstycharJ/MNRAS/491/655/t1990_01*Spectrum 1990-02-22.83 day 8.73 SAAOrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmem.wlfloatRfluxRelative fluxphot.flux.density;em.opt.RdoubleJ/MNRAS/491/655/t1990_03*Spectrum 1990-03-01.86 day 15.76 SAAOrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmem.wlfloatRfluxRelative fluxphot.flux.density;em.opt.RdoubleJ/MNRAS/491/655/listsp1*Observation log for Swift UVOT spectra and ANS spectrumObsid? Obsidmeta.id;obsintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintspShow the spectrummeta.ref.urlcharFileNameName of the file in subdirectory sp1meta.id;meta.filechargrismGrism [UV Vis]meta.id;instrcharJD? Julian date, JD-2450000dtime.epochdoublenullableDay? Day of observationdtime.epochfloatnullablePlace[offset ] placementmeta.notecharTitleTitlemeta.titlecharJ/MNRAS/491/655/listsp2List of fits spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNxNumber of pixels along X-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableblambdaLower value of wavelength interval0.1nmem.wlfloatBlambdaUpper value of wavelength interval0.1nmem.wlfloatdlambdaWavelenght resolution0.1nmpos.angResolutiondoublesizeSize of FITS fileKibytephys.size;meta.fitsintspShow the spectrummeta.ref.urlcharFileNameName of FITS file, in subdirectory sp2meta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharFileName2Original file namemeta.id;meta.filecharTelTelescope namemeta.id;instr.telcharSlit? Slitarcsecmeta.notefloatnullableExpTime? Exposure timestime.duration;obs.exposureintnullableAirmass? Airmassobs.airMassfloatnullableJ/MNRAS/491/655/listimgList of EROS fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainscaleScale of the imagearcsec/pixinstr.scalefloatNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory imgmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar