Search for Correlations in Supernova Light Curves Beyond the Standard Two-Parameter Model

Using supernovae from the SDSS-SN Survey we fit the shape parameter to individual SDSS passbands (g, r, i) as well as simultaneously to all passbands using SALT2. Through checking the normalized residuals, the passbands seem consistent when compared band to band. The i passband appears to deviate from the shape as measured in all passbands. There are hints of an effect for shape versus color in the r and i passbands that are possibly interesting. For the i passband, an adjustment in the i passband SALT2 model shape would need to occur. The correlations in the color parameter are not currently built into the SALT2 model, and would require a revised SN light curve model. However, the error calculations for slope calculations were oversimplified and the statistical significance of the effect is in doubt. 1) Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL 32901 2) Center for Particle Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510