Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
OJ 287	2012-04-28	03:27:29	2456045.64409	4	0.493	0.006	14.68	0.01
BZU J0742+5444	2012-04-28	04:58:22	2456045.70720	A	4.219	0.040
Mrk 421	2012-04-28	06:04:18	2456045.75299	1	-1.510	0.003	12.85	0.02
3C 273	2012-04-28	06:19:33	2456045.76358	C	0.852	0.002	12.72	0.04
PKS1244-255	2012-04-28	07:00:00	2456045.79167	A	2.531	0.012
3C 279	2012-04-28	07:36:42	2456045.81715	1	3.232	0.005	15.63	0.01
Ton 599	2012-04-28	08:50:36	2456045.86847	13	1.048	0.010	16.41	0.04
PKS1222+216	2012-04-28	09:30:42	2456045.89632	1	1.698	0.007	15.89	0.04
PKS1510-08	2012-04-28	10:03:50	2456045.91933	1	4.868	0.009	16.47	0.03
PG1553+113	2012-04-28	10:21:45	2456045.93177	A	-0.021	0.003
Mrk 501	2012-04-28	10:37:23	2456045.94263	A	1.310	0.002	13.92	0.01
B2 1846+32A	2012-04-28	11:05:28	2456045.96213	A	3.230	0.007
BL Lac	2012-04-28	11:24:00	2456045.97499	B	1.654	0.006	14.59	0.01
3C 454.3	2012-04-28	11:41:42	2456045.98729	4	2.758	0.021	16.59	0.04