Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
Mrk 421	2011-04-07	08:14:33	2455658.84344	1	-1.785	0.008	12.57	0.02
S4 1030+61	2011-04-07	08:26:56	2455658.85204	A	4.236	0.017
3C 273	2011-04-07	09:24:34	2455658.89206	C	0.882	0.002	12.75	0.04
3C 279	2011-04-07	10:02:23	2455658.91832	1	3.643	0.009	16.04	0.01
BL Lac	2011-04-07	11:41:33	2455658.98719	B	1.945	0.003	14.89	0.01