Time delay determination for the first gravitational lens Q0957+561 A,B

Abstract

• 1. We proposed a new special method for the estimation of the time delay. On the basis of the new analysis of the optical data carried out by us we can assume that the true delay is τ = 530 ± 15 days. The confidence level of this result is better than 99%.

• 2. The value of the time delay found by us leads to a essentially smaller value of the constant H than in the case with τ ≈ 415 days. On the base of the model by Falco et al.(1985) in conformity with the value of τ ₀ found by us, H ₀ < 68kms ⁻¹ Mpc ⁻¹.