Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
Mrk 501	2015-07-20	03:22:04	2457223.64032	A	1.236	0.011	13.85	0.02
Mrk 421	2015-07-20	03:39:14	2457223.65225	1	-1.926	0.003	12.43	0.02
3C 273	2015-07-20	04:04:08	2457223.66954	C	1.197	0.002	13.07	0.04
PKS1222+216	2015-07-20	04:43:11	2457223.69666	1	0.942	0.025	15.13	0.05
BL Lac	2015-07-20	05:49:03	2457223.74240	B	1.210	0.006	14.15	0.01