Timescale stretch parameterization of Type Ia supernova B-band light curves

  title={Timescale stretch parameterization of Type Ia supernova B-band light curves},
  author={Gerson. Goldhaber and Donald E. Groom and Alex G Kim and Greg Aldering and Pierre Astier and Alex Conley and Susana E. Deustua and Richard S. Ellis and S{\'e}bastien Fabbro and A. S. Fruchter and Ariel Goobar and Isobel M. Hook and Michael J. Irwin and M. Y. Kim and R. Knop and Christopher E. Lidman and Richard McMahon and Peter E. Nugent and R. Pain and Nino Panagia and Carlton R. Pennypacker and Saul Perlmutter and Pilar Ruiz-Lapuente and Bradley E. Schaefer and Nancy A. Walton and T. York and The Supernova Cosmology Project},
  journal={The Astrophysical Journal},
R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Cosmology Project (SCP) are fitted in brightness to templates allowing a free parameter the time-axis width factor w identically equal to s times (1+z). The data points are then individually aligned in the time-axis, normalized and K-corrected back to the rest frame, after which the nearly 1300 normalized intensity measurements are found to lie on a well-determined common rest-frame B-band curve which we… 
SALT : a spectral adaptive light curve template for type Ia supernovae
We present a new method to parameterize type Ia Supernovae (SN Ia) multi-color light curves. The method was developed in order to analyze the large number of SN Ia multi-color light curves measured
Light‐curve studies of nearby Type Ia supernovae with a Multiband Stretch method
We create new U-, B-, V-, R- and I-band light-curve templates of Type Ia supernovae (SNe Ia) and re-analyse 122 nearby (redshift < 0.11) SNe Ia using a new ‘Multiband Stretch method’, which is a
Direct analysis of spectra of the peculiar type Ia supernova 2000cx
The Type Ia supernova (SN) 2000cx exhibited multiple peculiarities, including a lopsided B-band light-curve peak that does not conform to current methods for using shapes of light curves to
Light curves of five type Ia supernovae at intermediate redshift
Aims. We present multi-band light curves and distances for five type Ia supernovae at intermediate redshifts, 0.18 < z < 0.27. Methods. Three telescopes on the Canary Island of La Palma, INT, NOT,
Improving the calibration of Type Ia supernovae using late-time light curves
The use of Type la supernovae (SNe Ia) as cosmological standard candles is a key to solving the mystery of dark energy. Improving the calibration of SNe Ia increases their power as cosmological
Light Curves of Type Ia Supernovae from Near the Time of Explosion
We present a set of 11 Type Ia supernova (SN Ia) light curves with dense, premaximum sampling. These supernovae (SNe), in galaxies behind the Large Magellanic Cloud (LMC), were discovered by the
Nonlinear Decline-Rate Dependence and Intrinsic Variation of Type Ia Supernova Luminosities
Published B and V fluxes from nearby Type Ia supernovae (SNe) are fitted to light-curve templates with four to six adjustable parameters. Separately, B magnitudes from the same sample are fitted to a
Multi-color light curves of type Ia supernovae on the color-magnitude diagram: A novel step toward more precise distance and extinction estimates
We show empirically that fits to the color-magnitude relation of Type Ia supernovae after optical maximum can provide accurate relative extragalactic distances. We report the discovery of an
SiFTO: An empirical method for fitting SN Ia light curves
We present SiFTO, a new empirical method for modeling Type Ia supernova (SN Ia) light curves by manipulating a spectral template. We make use of high-redshift SN data when training the model,
The rise-time distribution of nearby Type Ia supernovae
We present an analysis of the B- and V-band rise-time distributions of nearby Type Ia supernovae (SNe Ia). Drawing mostly from the recently published Lick Observatory Supernova Search sample of SNe


Time Dilation in the Light Curve of the Distant Type Ia Supernova SN 1995K
The light curve of a distant Type Ia supernova acts like a clock that can be used to test the expansion of the universe. SN 1995K, at a spectroscopic redshift of z = 0.479, provides one of the first
Optical Light Curve of the Type Ia Supernova 1998bu in M96 and the Supernova Calibration of the Hubble Constant
We present the UBV(RI)KC light curves of the Type Ia supernova SN 1998bu, which appeared in the nearby galaxy M96 (NGC 3368). M96 is a spiral galaxy in the Leo I group that has a Cepheid-based
The Absolute Magnitudes of Type IA Supernovae
Absolute magnitudes in the B, V, and I bands are derived for nine well-observed Type Ia supernovae, using host galaxy distances estimated via the surface brightness fluctuations or Tully-Fisher
The Rise Times of High- and Low-Redshift Type Ia Supernovae Are Consistent
We present a self-consistent comparison of the rise times for low- and high-redshift Type Ia supernovae. Following previous studies, the early light curve is modeled using a t2 law, which is then
Time Dilation from Spectral Feature Age Measurements of Type Ia Supernovae
We have developed a quantitative, empirical method for estimating the age of Type Ia supernovae (SNe Ia) from a single spectral epoch. The technique examines the goodness of fit of spectral features
A Generalized K correction for type Ia supernovae: Comparing R band photometry beyond z = 0.2 with B, V, and R band nearby photometry
Photometric measurements show that, as a group, nearby Type Ia supernovae follow similar light curves and reach similar peak magnitudes (Branch & Tammann 1992). Thus, these supernovae may serve as
The Physics of Type Ia Supernova Light Curves. I. Analytic Results and Time Dependence
We develop an analytic solution of the radiation transport problem for Type Ia supernovae (SNe Ia) and show that it reproduces bolometric light curves produced by more detailed calculations under the
The Absolute Luminosities of the Calan/Tololo Type Ia Supernovae
We examine the absolute luminosities of 29 SNe Ia in the Calan/Tololo survey. We confirm a relation between the peak luminosity of the SNe and the decline rate as measured by the light curve, as
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 " z " 0.62. The luminosity distances of these objects are determined by methods that
Explosion Models for Type IA Supernovae: A Comparison with Observed Light Curves, Distances, H 0, and Q 0
Theoretical monochromatic light curves and photospheric expansion velocities are compared with observations of 27 Type Ia supernovae (SNe Ia). A set of 37 models has been considered which encompasses