2 SN 2008es Miller et al., 2008, arXiv:0808.2193v1 2008/8/18 THE EXCEPTIONALLY LUMINOUS TYPE II-L SN 2008es Gezari et al., 2008, arXiv:0808.2812v1 (2008/8/21) DISCOVERY OF THE ULTRA-BRIGHT TYPE II-L SUPERNOVA 2008es

Miller et al. 2008Gezari et al. 2008IInIInIIn/IIa?II-LII-L-22z=0.

SN 2008es Texas Supernova Surch (TSS) ROSTE-III 0.45m 2008426(UT) luminous transient z=1.02? Type II Type II-L z=0.213Mv=-22.5 SN 2005ap (progenitor)mass-lossMiller et al., 2008, arXiv:0808.2193v1 2008/8/18 THE EXCEPTIONALLY LUMINOUS TYPE II-L SN 2008es 1. Introduction

2 . OBSERVATIONSSwift: UV, Optical, X-ray 2008.5.148.3 (11) PEARITEL: J,H,Ks 2008.5.16KAIT, 1-m Nickel telescope (Lick) : Optical 2008.5.30 3-m Shane telescope (Lick) : Optical 2008.6.2 & 8.5 X 1.5x1042erg/sPhotometry

SpectroscopyKast 3m-shane (Lick) Keck 10m Kitt Peak 4m (Director Discretionary Times)Kitt Peak 2P Cyg Hz=0.2Type II

SNID Blodin & Tonry (2007) Type II-L SNe 1979C, 1980K Z=0.213 +/- 0.006 ()B 2008.5.19 (19)

Photomeric ResultsSED26.6 day 65.4 day SED UVW2UVMFe line-blanketing (Type II-P 2006bp) BB BB

Bolometric light curve 0.042 mag day-1V (Rest B)-band light curve 0.036 day-1Decline rateSN 1979C (0.046 mag day-1) (SN 1980K 0.055 mag day-1)Bolometric luminosity 0.9 x 10 51 erg (day 15 83)

SpectroscopyFeatureless blue continuum (Gezari et al. 20085650)SN 2005ap W-shape CIII,NIII,OIII, 20000 km/s+21d+3+13dayHeIHHSN1979CSN 2008esH97C9700km/s08es 6000 km/s

2SN feature top-lighting effect CSMSN ejecta+68dayP CygH (Type II-P TypeII-L)H FWHM 9500 km/s (79C 10600 km/s , 80K 8200 km/s)

H line velocity increasing ?H8000km/sHeI5876/NaID800km/s Line velocity SN2005bf(HeI 3)EjectaNiHe I(2008esHHeI 4686

5. Discussion5.1. The Physical Nature of SN 2008esCSM2005apII-L4556Ni mass 10Mfast rise and decaydecay time 0.042 mag day-1 56Co decayShock energyshell23x1015 cm initial enevelope radii2030

5.2 The Host of SN 2008es -17.4 (SMC -16.9) SN 2006tf SN 2005ap5.3 Rate of Extremely Luminous SN 2008es-like EventsTSS (3) 05ap, 06gy, 06tf, 08es4(Type II-L) 30 SNe Ia at z0.1 08es z~0.3 2330/2 x 23 = 350KAIT Ssupernova Survey 10,000 II160

6.Conclusion2SN 2008esCSMLight curve0.042mag / day 56Co E > 1051 erg SN1979CHLate phase Peak radioactive decayCSM SN 2006tf SN 2006gy1979C30CSMX,Opt,radio 2006gy light echo ( 0.3 pc ) SN 2008espeakradioactivedepsositeH-rich

Gezari et al., 2008, arXiv:0808.2812v1 (2008/8/21) DISCOVERY OF THE ULTRA-BRIGHT TYPE II-L SUPERNOVA 2008es 2. ObservationsROTSE-IIIb 45cm 2008.4.26 50Palomar 60-inch 2008.5.2 1001.3m MDM 2008.5.24 452.1 PhotometryROTSE2008.5.16Miller et al.3

2.2. SpectroscopyHobberly Eberly Telescope 2008.5.1 5.8 Palomar 200-inch 2008.5.2Quasar z=1.02(featureless blue continuum) Palomar 20088.1z=0.21HeII4686z=0.205 +/- 0.001 (Miller et al. z=0.213)H-7400 km/s NaID -7100 km/s

2.3. Host Galaxy Miller et al. SDSS 8.3 z=0.20540kpc (SNhost)

2.3. Swift Observations 100(Miller et al. 80)SEDUVWUVMMiller et al. T=14000K3x1015cm( 10 )

3Result31.Comparison with Type II SNe 9 0.029 mag / day Type II-P 530.035 mag / day Type II-L Type II-P II-L Swift 101d Tbb=5x103 ,Rbb=2x1015, L=1.42x1043 e td/111 56Ni mass M 0.2 MColor Type II-L Integrated curve E=5.6x1051 erg(Miller et al)

Type II-P SneLuminostiy 2005cs502006bp52008es 14000KType II-P 6000 K 08es53.2 Interaction with CSMX upper limit < 2.4 x 1042 erg / s (0.3 -10keV) Xmass loss 5x104 M/ yr CSMpeak5

3.3.Comaprison with ModelsModel Bilinnikov & Bartunov (1993) 6000R-2 M M -M / yr ) SN 1979C (Mv -19.6 mag)UVMB-mag : 10-3 M / yrSwift

Model Young et al. (2005)ProgenitorH envelope GRBjetH envelopeshockBBModel Smith & McCray(2007), Woosely+ 2007Dence CSM shockradiationnarrow Hfast rising & broad symmetric HModel 56Co dacay thermalizationPeakM Swift 56Coradioactive decay

KANATA/TRISPECSN 2006gy Mv=-22, Type IIn SN 2008fz