J/AJ/149/95ivo://CDS.VizieR/J/AJ/149/95doi:10.26093/cds/vizier.51490095CDSSchwarz G.J.Shore S.N.Page K.L.Osborne J.P.Beardmore A.P.,Walter F.M.Bode M.F.Drake J.J.Ness J.-U.Starrfield S.,Van Rossum D.R.Woodward C.E.2017-06-19T07:57:49Z2015-03-23T08:18:16ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsnovaeinfrared-photometryvisible-astronomybroad-band-photometryWe present the results of an intensive multiwavelength campaign on nova LMC 2012. This nova evolved very rapidly in all observed wavelengths. The time to fall two magnitudes in the V band was only 2days. In X-rays the super soft phase began 13+/-5days after discovery and ended around day 50 after discovery. During the super soft phase, the Swift/XRT and Chandra spectra were consistent with the underlying white dwarf (WD) being very hot, ~1MK, and luminous, ~10^38^erg/s. The UV, optical, and near-IR photometry showed a periodic variation after the initial and rapid fading had ended. Timing analysis revealed a consistent 19.24+/-0.03hr period in all UV, optical, and near-IR bands with amplitudes of ~0.3mag which we associate with the orbital period of the central binary. No periods were detected in the corresponding X-ray data sets. A moderately high inclination system, i=60+/-10{deg}, was inferred from the early optical emission lines. The HST/STIS UV spectra were highly unusual with only the N v (1240{AA}) line present and superposed on a blue continuum. The lack of emission lines and the observed UV and optical continua from four epochs can be fit with a low mass ejection event, ~10^-6^M_{sun}_, from a hot and massive WD near the Chandrasekhar limit. The WD, in turn, significantly illuminated its subgiant companion which provided the bulk of the observed UV/optical continuum emission at the later dates. The inferred extreme WD characteristics and low mass ejection event favor nova LMC 2012 being a recurrent nova of the U Sco subclass.2015AJ....149...95Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/95CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/288 : IRSF Magellanic Clouds Point Source Catalog (Kato+ 2007)I/305 : The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006)I/284 : The USNO-B1.0 Catalog (Monet+ 2003)J/ApJS/197/31 : Swift X-ray observations of novae. II. (Schwarz+, 2011)J/AJ/128/1606 : Magellanic Clouds Photometric Survey: the LMC (Zaritsky+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/95https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/149/95http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/149/95https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/149/95https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/149/95http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/149/95GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/149/95/table3Swift/XRT 0.3-10keV count rate and hardness ratiorecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDt1[0.5/672] Time since discovery (G1)dtime.epoch;obsfloatMJD1Modified Julian Date corresponding to Dt1dtime.epoch;obsdoublel_CR[<] Upper limit flag on CRmeta.code.errorcharCR[0.003/5.89] Count Ratect/sphot.count;em.X-rayfloatE_CR? Positive uncertainty in CRct/sstat.error;stat.maxfloatnullablee_CR? Negative uncertainty in CRct/sstat.errorfloatnullableDt2? Time since discovery for HR result (G1)dtime.epoch;obsfloatnullableMJD2? Modified Julian Date corresponding to Dt2dtime.epoch;obsdoublenullableHR[0.2/2.19]? Hardness ratio (1)phot.flux;arith.ratiofloatnullableE_HR? Positive uncertainty in HRstat.error;stat.maxfloatnullablee_HR? Negative uncertainty in HRstat.errorfloatnullableJ/AJ/149/95/table2UV, optical, and IR photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFltFilter used in the observation (BVRI, JHK, m2, w1, w2) (1)instr.setup;obscharDt[0.5/672] Time since discovery (G1)dtime.epoch;obsfloatMJD[56012/56684] Modified Julian Date of observationdtime.epoch;obsdoublemag[9.369/19.94] Observed magnitude in Filtermagphot.magfloate_magUncertainty in magmagstat.error;phot.magfloatSourceFacility used to obtain the photometry (2)instr.setup;obschar