Bibcode
                                    
                            Vinkó, J.; Sárneczky, K.; Takáts, K.; Marion, G. H.; Hegedüs, T.; Bíró, I. B.; Borkovits, T.; Szegedi-Elek, E.; Farkas, A.; Klagyivik, P.; Kiss, L. L.; Kovács, T.; Pál, A.; Szakáts, R.; Szalai, N.; Szalai, T.; Szatmáry, K.; Szing, A.; Vida, K.; Wheeler, J. C.
    Referencia bibliográfica
                                    Astronomy and Astrophysics, Volume 546, id.A12, 8 pp.
Fecha de publicación:
    
                        10
            
                        2012
            
  Revista
                                    
                            Número de citas
                                    46
                            Número de citas referidas
                                    44
                            Descripción
                                    Aims: The nearby, bright, almost completely unreddened Type Ia
supernova 2011fe in M101 provides a unique opportunity to test both the
precision and the accuracy of the extragalactic distances derived from
SNe Ia light curve fitters.  Methods: We applied the current,
public versions of the independent light curve fitting codes MLCS2k2 and
SALT2 to compute the distance modulus of SN 2011fe from high-precision,
multi-color (BVRI) light curves.  Results: The results from the
two fitting codes confirm that 2011fe is a "normal" (not peculiar) and
only slightly reddened SN Ia. New unreddened distance moduli are derived
as 29.21 ± 0.07 mag (D ~ 6.95 ± 0.23 Mpc, MLCS2k2), and
29.05 ± 0.07 mag (6.46 ± 0.21 Mpc).  Conclusions:
Despite the very good fitting quality achieved with both light curve
fitters, the resulting distance moduli are inconsistent by 2σ.
Both are marginally consistent (at ~1σ) with the Hubble Space
Telescope key project distance modulus for M101. The SALT2 distance is
in good agreement with the recently revised Cepheid- and TRGB-distance
to M101. Averaging all SN- and Cepheid-based estimates, the absolute
distance to M101 is ~6.6 ± 0.5 Mpc.