Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
3C 273	2012-06-13	03:42:29	2456091.65450	C	0.926	0.015	12.80	0.04
Mrk 421	2012-06-13	05:02:01	2456091.70973	1	-1.970	0.019	12.39	0.02
3C 279	2012-06-13	05:37:59	2456091.73470	1	3.584	0.010	15.98	0.01
Ton 599	2012-06-13	06:14:41	2456091.76019	13	0.993	0.014	16.35	0.04
BL Lac	2012-06-13	09:42:54	2456091.90479	B	1.740	0.005	14.68	0.01