Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
3C 454.3	2010-07-12	07:54:36	2455389.82958	4	2.034	0.006	15.85	0.02
BL Lac	2010-07-12	08:20:56	2455389.84787	B	1.984	0.002	14.93	0.01
3C 454.3	2010-07-12	11:05:32	2455389.96218	4	2.076	0.006	15.90	0.02