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Observational analysis demonstrates refined cosmological constraints using 740 type Ia supernovae, highlighting improved precision in measuring cosmic expansion across multiple redshifts.
Aims. We present cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations. The dataset includes several low-redshift samples (z< 0.1), all three seasons from the SDSS-II (0.05 <z< 0.4), and three years from SNLS (0.2 <z< 1), and it totals 740 spectroscopically confirmed type Ia supernovae with high-quality light curves.
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Betoule et al. (2014) studied this question.
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