J/ApJ/731/120 Intrinsic SN Ia light curves (Mandel+, 2011)
Type Ia supernova light curve inference: hierarchical models in the optical and near-infrared. Mandel K.S., Narayan G., Kirshner R.P. <Astrophys. J., 731, 120 (2011)> =2011ApJ...731..120M
ADC_Keywords: Supernovae ; Photometry ; Redshifts ; Models ; Extinction Keywords: distance scale - methods: statistical - supernovae: general Abstract: We have constructed a comprehensive statistical model for Type Ia supernova (SN Ia) light curves spanning optical through near-infrared (NIR) data. A hierarchical framework coherently models multiple random and uncertain effects, including intrinsic supernova (SN) light curve covariances, dust extinction and reddening, and distances. An improved BayeSN Markov Chain Monte Carlo code computes probabilistic inferences for the hierarchical model by sampling the global probability density of parameters describing individual SNe and the population. We have applied this hierarchical model to optical and NIR data of 127 SNe Ia from PAIRITEL, CfA3, Carnegie Supernova Project, and the literature. We find an apparent population correlation between the host galaxy extinction AV and the ratio of total-to-selective dust absorption RV. For SNe with low dust extinction, AV≲0.4, we find RV∼2.5-2.9, while at high extinctions, AV≳1, low values of RV<2 are favored. The NIR luminosities are excellent standard candles and are less sensitive to dust extinction. They exhibit low correlation with optical peak luminosities, and thus provide independent information on distances. The combination of NIR and optical data constrains the dust extinction and improves the predictive precision of individual SN Ia distances by about 60%. Using cross-validation, we estimate an rms distance modulus prediction error of 0.11mag for SNe with optical and NIR data versus 0.15mag for SNe with optical data alone. Continued study of SNe Ia in the NIR is important for improving their utility as precise and accurate cosmological distance indicators. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 115 110 Apparent light curve and dust estimates for individual SN Ia table5.dat 55 110 Distance modulus predictions for SN Ia
See also: B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-) J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012) J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010) J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010) J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009) J/ApJ/700/1097 : Light curve parameters of SN Ia (Hicken+, 2009) J/MNRAS/384/107 : VRIJHK photometry of SN 2002cv (Elias-Rosa+, 2008) J/ApJ/689/377 : SNe Ia as NIR standard candles from PAIRITEL (Wood-Vasey+, 2008) J/AJ/136/2306 : SDSS-II Supernova survey, 2005 (Holtzman+, 2008) J/MNRAS/376/1301 : UBVRI light-curves of SN 2005cf (Pastorello+, 2007) J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007) J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006) J/MNRAS/369/1880 : Photometry of SN 2003cg (Elias-Rosa+, 2006) J/A+A/437/789 : Restframe I-band light curves of SN Ia (Nobili+, 2005) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [SN] 3- 8 A6 --- SN SN name (YYYYaa) 10- 14 F5.2 mag B0mag ?=99.99 Rest-frame B band maximum magnitude (1) 16- 19 F4.2 mag e_B0mag ?=9.99 Uncertainty in B0mag 21- 24 F4.2 mag Dm15 ?=9.99 B band decline rate Δm15(B) from peak to 15 day past maximum. 26- 29 F4.2 mag e_Dm15 ?=9.99 Uncertainty in Dm15 31- 35 F5.2 mag V0mag ?=99.99 Rest-frame V band magnitude (2) 37- 40 F4.2 mag e_V0mag ?=9.99 Uncertainty in V0mag 42- 46 F5.2 mag R0mag ?=99.99 Rest-frame R band magnitude (2) 48- 51 F4.2 mag e_R0mag ?=9.99 Uncertainty in R0mag 53- 57 F5.2 mag I0mag ?=99.99 Rest-frame I band magnitude (2) 59- 62 F4.2 mag e_I0mag ?=9.99 Uncertainty in I0mag 64- 68 F5.2 mag J0mag ?=99.99 Rest-frame J band magnitude (2) 70- 73 F4.2 mag e_J0mag ?=9.99 Uncertainty in J0mag 75- 79 F5.2 mag H0mag ?=99.99 Rest-frame H band magnitude (2) 81- 84 F4.2 mag e_H0mag Uncertainty in H0mag 86- 89 F4.2 mag AV Marginal posterior mode of V band extinction 91- 94 F4.2 mag e_AV Lower 68% interval in AV 96- 99 F4.2 mag E_AV Upper 68% interval in AV 101-103 F3.1 --- Rv Marginal posterior mean ratio of total-to-selective dust absorption (RV=AV/(AB-AV)) 105-107 F3.1 --- e_Rv Standard Deviation uncertainty in Rv 109-115 A7 --- Ref Reference code (3)
Note (1): Corrected for Milky Way extinction and K-corrections. Estimates only listed if SN was observed in the filter. Note (2): At time of maximum in B, corrected for Milky Way extinction and K-corrections. Note (3): Reference as follows: CfA3 = Hicken et al. (2009, Cat. J/ApJ/700/331); WV08 = Wood-Vasey et al. (PAIRITEL; 2008, Cat. J/ApJ/689/377); WC3 = WV08+CfA3; J99 = Jha et al. (1999ApJS..125...73J); H00 = Hernandez et al. (2000MNRAS.319..223H); K00 = Krisciunas et al. (2000ApJ...539..658K); K01 = Krisciunas et al. (2001AJ....122.1616K); DP02 = Di Paola et al. (2002A&A...393L..21D); V03 = Valentini et al. (2003ApJ...595..779V); K03 = Krisciunas et al. (2003AJ....125..166K); K04b = Krisciunas et al. (2004AJ....127.1664K); K04c = Krisciunas et al. (2004AJ....128.3034K); K07 = Krisciunas et al. (2007AJ....133...58K); ER06 = Elias-Rosa et al. (2006, Cat. J/MNRAS/369/1880); ER07 = Elias-Rosa et al. (2008, Cat. J/MNRAS/384/107); Pa07 = Pastorello et al. (2007, Cat. J/MNRAS/376/1301); St07 = Stanishev et al. (2007A&A...469..645S); P08 = Pignata et al. (2008MNRAS.388..971P).
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [SN] 3- 8 A6 --- SN SN name (YYYYaa) 10- 17 F8.2 km/s cz Redshift 19- 23 F5.2 mag muz Distance modulus expected from redshift (4) 25- 28 F4.2 mag e_muz Distance modulus standard deviation (5) 30- 34 F5.2 mag mu1 Distance modulus estimated from resubstitution 36- 40 F5.2 mag mu2 Mean predicted distance modulus over bootstrap 42- 45 F4.2 mag e_mu2 Standard deviation of mu2 (6) 47- 50 F4.2 mag sig2 Average standard deviation of uncertainty in mu2 52- 55 F4.2 mag AVm Marginal posterior mode V band extinction (7)
Note (4): Assuming h=0.72, ΩM=0.27, ΩΛ=0.73, w=-1. Note (5): Assuming peculiar velocity dispersion σpec=150km/s. Note (6): Zero values are less than 0.005mag. Note (7): Averaged over the prediction sets for each SN.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 24-Oct-2012
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