SIMBAD references

New measurements of the longitudinal magnetic field of the Ap star gamma Equ obtained with the MSS spectrograph of the 6-m telescope of the SAO RAS in 2002-2018 are present. Analyzing our results together with all the available literature data sources of < B z > (441 measurements) we found the rotation period P = 89.1 ± 4.2 years (32 521 days). Fitting all the measurements with double sine-wave function resulted in two periods equal to 95.5 and 17.4 years (with the errors of 3.5 and 2 years correspondingly). According to our new estimate, the transition to positive values of < B z >, probably, will occur later than previously assumed, literally in 2031.