A supernova flashed in the galaxy, which at its maximum had an apparent magnitude of + 6m. Determine the distance to this galaxy

A supernova flashed in the galaxy, which at its maximum had an apparent magnitude of + 6m. Determine the distance to this galaxy if it was a type 1a flash. On average, the absolute stellar magnitude of type 1a supernovae is -17.5m

Absolute stellar magnitude M = m + 5 – 5log R -17.5 = +6 4- 5 – 51g R, log R = 5.7, E = 500 kpc

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