Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
Mrk 421	2017-05-21	03:27:33	2457894.64413	1	-0.799	0.005	13.56	0.02
OJ 287	2017-05-21	03:52:39	2457894.66156	4	0.372	0.007	14.56	0.01
S4 1030+61	2017-05-21	04:45:33	2457894.69830	A	4.081	0.020
3C 279	2017-05-21	05:12:17	2457894.71686	1	2.897	0.007	15.30	0.01
Ton 599	2017-05-21	06:00:29	2457894.75034	13	2.116	0.018	17.48	0.04
W Com	2017-05-21	06:25:47	2457894.76791	A	3.751	0.010	15.83	0.04
PKS1222+216	2017-05-21	06:48:10	2457894.78345	1	1.239	0.009	15.43	0.04
S3 1227+25	2017-05-21	07:09:30	2457894.79826	A	0.838	0.008
PKS1510-08	2017-05-21	07:41:28	2457894.82046	1	4.725	0.013	16.32	0.03
PG1553+113	2017-05-21	07:58:20	2457894.83218	A	0.113	0.005
Mrk 501	2017-05-21	08:17:41	2457894.84561	A	1.332	0.003	13.94	0.01
BL Lac	2017-05-21	10:07:32	2457894.92190	B	1.328	0.003	14.27	0.01
CTA102	2017-05-21	10:29:09	2457894.93691	2	0.973	0.014	15.85	0.03
3C 454.3	2017-05-21	10:57:41	2457894.95672	4	2.347	0.013	16.18	0.03
PKS2155-304	2017-05-21	11:30:38	2457894.97961	2	1.453	0.032	13.49	0.03