# SALT spectral time series

(or templates/surfaces)

Please use the complete installation scripts that you can find here if you are not familiar with the package organization and want to reproduce published results.

## Data

- salt2_model_data-2-4.tar.gz, from Betoule et al. (2014), Joint SDSS/SNLS Lightcurve Analysis (1)
- salt2_model_data-2-0.tar.gz, from Guy et al. (2010), SNLS 3 year cosmology analysis (SNLS3) (2)
- salt2_model_data-1-0.tar.gz, from Guy et al. (2007), first release of SALT2 (with salt2_spec_dispersion_scaling.dat fixed)
- salt_model_data-1-0.tar.gz, from Guy et al. (2005), SALT1 model data

(1) Extracted from salt2-4_data.tgz (md5:af829c7f177c6037adcbe0a89360464a) that can also be found in the SDSS-II/SNLS3 Joint Light-curve Analysis data release page.

(2) Data set should be used with code version 2.2.0 or higher. The same applies to more recent versions.

## Description

The archive file contains all the data that define the model.

**SALT2**

`salt2_template_0.dat`

Average spectral sequence`salt2_template_1.dat`

Spectral sequence of 1st variability component`salt2_color_correction.dat`

Model of color variation law`salt2_color_dispersion.dat`

Model of color errors (~ k-correction errors)`salt2_lc_relative_variance_0.dat`

Variance of average spectral sequence (error on mean), for lightcurves`salt2_lc_relative_variance_1.dat`

Variance of first component (error on mean), for lightcurves`salt2_lc_relative_covariance_01.dat`

Covariance of of components 0 and 1, for lightcurves`salt2_lc_dispersion_scaling.dat`

Error scaling to account for the residual dispersion, for lightcurves`salt2_spec_variance_0.dat`

Variance of average spectral sequence (error on mean), for spectra (only in Guy 2007 version)`salt2_spec_variance_1.dat`

Variance of first component (error on mean), for spectra (only in Guy 2007 version)`salt2_spec_covariance_01.dat`

Covariance of of components 0 and 1, for spectra (only in Guy 2007 version)

**SALT1**

`salt_template.dat`

Average spectral sequence (modified version of P. Nugent template)`corrections_stretch`

Polynomial corrections as a function of stretch, phase, wavelength`corrections_color`

Polynomial corrections as a function of color and wavelength