J/ApJ/920/127ivo://CDS.VizieR/J/ApJ/920/127doi:10.26093/cds/vizier.19200127CDSJencson J.E.Andrews J.E.Bond H.E.Karambelkar V.Sand D.J.,van Dyk S.D.Blagorodnova N.Boyer M.L.Kasliwal M.M.Lau R.M.,Mohamed S.Williams R.Whitelock P.A.Amaro R.C.Bostroem K.A.,Dong Y.Lundquist M.J.Valenti S.Wyatt S.D.Burke J.De K.,Jha S.W.Johansson J.Rojas-Bravo C.Coulter D.A.Foley R.J.,Gehrz R.D.Haislip J.Hiramatsu D.Howell D.A.Kilpatrick C.D.,Masci F.J.McCully C.Ngeow C.-C.Pan Y.-C.Pellegrino C.Piro A.L.,Kouprianov V.Reichart D.E.Rest A.Rest S.Smith N.2025-02-13T20:11:25Z2024-03-13T10:26:54ZCDS support team

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

cds-question@unistra.frnovaeinfrared-photometryvisible-astronomybroad-band-photometryultraviolet-photometryspectroscopyinfrared-astronomyNova eruptions, thermonuclear explosions on the surfaces of white dwarfs (WDs), are now recognized to be among the most common shock-powered astrophysical transients. We present the early discovery and rapid ultraviolet (UV), optical, and infrared (IR) temporal development of AT 2019qyl, a recent nova in the nearby Sculptor Group galaxy NGC 300. The light curve shows a rapid rise lasting <~1day, reaching a peak absolute magnitude of MV=-9.2mag and a very fast decline, fading by 2mag over 3.5days. A steep dropoff in the light curves after 71days and the rapid decline timescale suggest a low-mass ejection from a massive WD with M_WD_>~1.2M{sun}. We present an unprecedented view of the early spectroscopic evolution of such an event. Three spectra prior to the peak reveal a complex, multicomponent outflow giving rise to internal collisions and shocks in the ejecta of an He/N-class nova. We identify a coincident IR-variable counterpart in the extensive preeruption coverage of the transient location and infer the presence of a symbiotic progenitor system with an O-rich asymptotic-giant-branch donor star, as well as evidence for an earlier UV-bright outburst in 2014. We suggest that AT 2019qyl is analogous to the subset of Galactic recurrent novae with red-giant companions such as RS Oph and other embedded nova systems like V407 Cyg. Our observations provide new evidence that internal shocks between multiple, distinct outflow components likely contribute to the generation of the shock-powered emission from such systems.2021ApJ...920..127Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/920/127CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)J/A+A/442/281 : Late-type giants BVRIJHKL and Teff calib (Kucinskas+, 2005)J/ApJ/636/1002 : Z And UBV photometry & equivalent widths (Sokoloski+, 2006)J/A+A/506/1277 : Modelling of Magellanic Cloud C/O stars (Groenewegen+, 2009)J/AJ/137/4810 : LMC-SAGE AGB star candidates (Srinivasan+, 2009)J/MNRAS/394/795 : AGB stars Fornax dwarf spheroidal galaxy (Whitelock+, 2009)J/ApJS/187/275 : Photometric histories of recurrent novae (Schaefer, 2010)J/AJ/140/34 : Classification of nova light curves (Strope+, 2010)J/A+A/533/A52 : X-ray monitoring of M31 novae (Henze+, 2011)J/ApJS/197/31 : Swift X-ray obs of classical novae. II. (Schwarz+, 2011)J/A+A/532/A54 : GRAMS carbon-star model grid (Srinivasan+, 2011)J/MNRAS/438/L101 : First month on SN 2013ej (Valenti+, 2014)J/ApJ/800/51 : DUSTiNGS II. Metal-poor dusty AGB stars (Boyer+, 2015)J/AJ/151/88 : LMC NIR Synoptic Survey. II (Bhardwaj+, 2016)J/ApJ/833/149 : Opt/NIR obs. of M31N 2008-12a 2015 eruption (Darnley+, 2016)J/MNRAS/459/3939 : Type II supernova light curves (Valenti+, 2016)J/ApJ/839/88 : 14 IR transients with Spitzer (SPRITEs) (Kasliwal+, 2017)J/ApJS/228/5 : Spitzer photo ~1million stars in M31 & 15 gal. (Khan, 2017)J/ApJ/834/196 : Galactic novae with m<=10 from 1900 to 2015 (Shafter, 2017)J/ApJ/852/108 : Multiwave obs. of gamma-ray NOVA Sco 2012 (Finzell+, 2018)J/ApJ/853/62 : Optical & NIR spectra & LCs of SN2016ija (Tartaglia+, 2018)J/ApJ/886/40 : Luminous SPIRITS IR transient follow-up obs (Jencson+, 2019)J/ApJ/877/110 : SPIRITS cat of IR long period variables (Karambelkar+, 2019)J/ApJ/895/31 : Photo observations of Type II SN 2018ivc (Bostroem+, 2020)J/ApJ/912/19 : Follow-up phot. & sp. of 12 PGIR novae (De+, 2021)J/ApJ/910/134 : Swift-XRT light curves of 13 Galactic novae (Gordon+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/920/127https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/920/127http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/920/127https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/920/127https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/920/127http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/920/127GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.9193497546148093e-20 6.185923063528282e-20UVOpticalInfrareddefaultJ/ApJ/920/127/table1Photometry from follow-up observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58752.2/58879.1] Modified Julian date (JD-2400000.5)dtime.epochdoublePhase[0.09/127] Time since MJD 58752.12dtime.phasefloatTelTelescope and instrument used (1)meta.id;instr.telcharBandPhotometric bandinstr.bandpasscharl_mag5-sigma limit flag on mag for a non-detectionmeta.code.errorcharmag[16.07/22.52] Apparent magnitude in Band (2)magphot.magfloate_mag[0.01/0.6]? 1-sigma uncertainty on magmagstat.error;phot.magfloatnullableJ/ApJ/920/127/table2Log of spectroscopic observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[2019] Year of observation (UT)stime.epochMJD[58752.25/58821.3] Modified Julian Datedtime.epochdoublePhase[0.17/69.13] Phasedtime.phasefloatTelTelescope/instrument as in Figure 3 (G1)meta.id;instr.telcharRangeWavelength range in Angstroms0.1nmem.wlcharResResolution ({lambda}/{delta}{lambda})pos.angResolutioncharHaRes[210/900]? H{alpha} resolutionkm/spos.angResolution;spect.line;em.line.HalphaintnullablespInteractive spectrum plotmeta.ref.urlcharJ/ApJ/920/127/table5Pre-eruption NIR photometry from Baade/FourStarrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[55813.38/57015.1] Modified Julian date (JD-2400000.5)dtime.epochdoublePhase[-2939/-1737] Time since MJD 58752.12dtime.phasedoubleBand[ HJKs] Photometric band (2MASS system)instr.bandpasscharmag[18.6/20.2] Apparent Vega magnitude in Bandmagphot.mag;em.IR.NIRfloate_mag[0.06/0.1] 1-sigma uncertainty on magmagstat.error;phot.magfloatJ/ApJ/920/127/table6Pre-eruption IR photometry from Spitzer/IRAC4.5Fnu[3.5/13.7]? Total Flux in IRAC 4.5um (1)mJyphot.flux;em.IR.4-8umfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[52964.06/58593.6] Modified Julian date (JD-2400000.5)dtime.epochdoublePhase[-5789/-158] Time since MJD 58752.12dtime.phasedoublee_3.6Fnu[1.3/5] Uncertainty in 3.6FnumJystat.error;phot.mag;em.IR.3-4umfloat3.6mag[18/19] IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloate_3.6mag[0.09/0.4] Uncertainty in 3.6magmagstat.error;phot.mag;em.IR.3-4umfloatd4.5Fnu[-4.8/5.4]? Flux in IRAC 4.5um difference imagesmJyphot.flux;em.IR.4-8um;arith.difffloatnullablee_d4.5Fnu[0.9/5.7]? Uncertainty in d4.5FnumJystat.error;phot.flux;em.IR.4-8umfloatnullablee_4.5Fnu[1/5.7]? Uncertainty in 4.5FnumJystat.error;phot.mag;em.IR.4-8umfloatnullable4.5mag[17.8/19.1]? IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag[0.1/1.1]? Uncertainty in 4.5magmagstat.error;phot.mag;em.IR.4-8umfloatnullabled3.6Fnu[-1.5/8.3] Flux in IRAC 3.6um difference imagesmJyphot.flux;em.IR.3-4um;arith.difffloate_d3.6Fnu[1.1/5] Uncertainty in d3.6FnumJystat.error;phot.flux;em.IR.3-4umfloat3.6Fnu[7.3/17.1] Total Flux in IRAC 3.6um (1)mJyphot.flux;em.IR.3-4umfloatJ/ApJ/920/127/fig3Optical and late-time NIR spectroscopic sequence of AT2019qylMJD[58752.29/58821.25] Modified Julian Date (JD-2400000.5)dtime.epochdoubleindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTelTelescope and instrument (G1)meta.id;instr.telcharlambda[3499.7/24669.2] Observed Wavelength (1)0.1nmem.wldoubleFlambda[-2.5e-14/4.2e-13]? Observed flux density in erg/s/cm^2^/{AA} (1)cW.m**-2.nm**-1phot.flux.densitydoublenullable