Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
3C 279	2017-04-28	04:47:58	2457871.69998	1	3.658	0.017	16.06	0.02
OJ 287	2017-04-28	04:56:04	2457871.70560	4	0.739	0.008	14.93	0.01
Mrk 421	2017-04-28	05:13:47	2457871.71791	1	-0.811	0.013	13.55	0.02
Mrk 501	2017-04-28	05:22:08	2457871.72370	A	1.396	0.026	14.01	0.03
Mrk 501	2017-04-28	08:14:03	2457871.84309	A	1.341	0.013	13.95	0.02
PKS1510-08	2017-04-28	08:21:15	2457871.84809	1	4.565	0.031	16.16	0.04