Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
OJ 287	2013-04-12	04:45:38	2456394.69836	4	0.992	0.023	15.18	0.02
Mrk 421	2013-04-12	05:50:39	2456394.74351	1	-2.181	0.003	12.18	0.02
Mrk 421	2013-04-12	10:18:49	2456394.92973	1	-2.178	0.015	12.18	0.02
BL Lac	2013-04-12	11:52:15	2456394.99462	B	2.454	0.012	15.39	0.02