Table 2: rms scatter of the PMT magnitude differences (mmag) between comparison stars. N is the number of differential measurements.
Compared pair N y b v u

NGC 3293-20, HD 92072 (C1,C2) 668 6 6 6 7

NGC 3293-20, HD 91477 (C1,C3) 368 6 6 6 7

HD 92072, HD 91477 (C2,C3) 1068 6 6 7 9

**Table 2:** rms scatter of the PMT magnitude differences (mmag) between comparison stars. N is the number of differential measurements.
Compared pair	N	y	b	v	u
NGC 3293-20, HD 92072 (C1,C2)	668	6	6	6	7
NGC 3293-20, HD 91477 (C1,C3)	368	6	6	6	7
HD 92072, HD 91477 (C2,C3)	1068	6	6	7	9

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and reduction
	3 Ephemeris and period analysis
	4 Spectroscopic analysis
	5 Photometric analysis
	6 Absolute dimensions and evolutionary status
	7 Conclusions
	References