Object	UT Date	UT	JD	Comp Star	ΔV	σ(ΔV)	V	σ(V)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
Mrk 421	2009-10-21	11:56:01	2455125.99723	1	-0.876	0.002	13.48	0.02
Mrk 421	2009-10-22	12:18:09	2455127.01260	1	-0.923	0.002	13.44	0.02
Mrk 421	2009-10-23	12:12:18	2455128.00854	1	-0.959	0.003	13.40	0.02
Mrk 421	2009-10-26	12:16:09	2455131.01122	1	-1.032	0.002	13.33	0.02
Mrk 421	2009-11-15	11:28:41	2455150.97825	1	-1.119	0.003	13.24	0.02
Mrk 421	2009-11-16	11:42:03	2455151.98753	1	-1.144	0.003	13.22	0.02
Mrk 421	2009-11-17	11:28:27	2455152.97809	1	-1.139	0.002	13.22	0.02
Mrk 421	2009-11-18	11:00:00	2455153.95833	1	-1.137	0.002	13.22	0.02
Mrk 421	2009-11-19	11:48:22	2455154.99192	1	-1.133	0.003	13.23	0.02
Mrk 421	2009-12-15	10:34:16	2455180.94046	1	-1.369	0.001	12.99	0.02
Mrk 421	2009-12-17	12:28:07	2455183.01953	1	-1.513	0.001	12.85	0.01
Mrk 421	2009-12-18	09:47:23	2455183.90790	1	-1.413	0.001	12.94	0.01
Mrk 421	2009-12-19	09:56:16	2455184.91407	1	-1.486	0.001	12.87	0.02
Mrk 421	2009-12-20	10:12:12	2455185.92514	1	-1.493	0.001	12.87	0.02
Mrk 421	2010-01-14	08:39:38	2455210.86086	1	-1.538	0.002	12.82	0.02
Mrk 421	2010-01-15	08:35:22	2455211.85789	1	-1.502	0.001	12.86	0.02
Mrk 421	2010-02-13	08:01:33	2455240.83441	1	-1.305	0.002	13.06	0.02
Mrk 421	2010-02-14	07:40:37	2455241.81987	1	-1.235	0.002	13.13	0.02
Mrk 421	2010-02-15	07:49:13	2455242.82584	1	-1.301	0.001	13.06	0.02
Mrk 421	2010-02-16	07:34:08	2455243.81537	1	-1.317	0.001	13.04	0.02
Mrk 421	2010-02-17	07:29:26	2455244.81211	1	-1.292	0.001	13.07	0.02
Mrk 421	2010-02-19	10:07:38	2455246.92197	1	-1.178	0.001	13.18	0.01
Mrk 421	2010-03-15	06:57:03	2455270.78962	1	-1.272	0.002	13.09	0.02
Mrk 421	2010-03-16	05:47:17	2455271.74117	1	-1.212	0.002	13.15	0.02
Mrk 421	2010-03-17	06:25:14	2455272.76752	1	-1.199	0.050	13.16	0.05
Mrk 421	2010-03-18	07:13:40	2455273.80116	1	-1.178	0.002	13.18	0.02
Mrk 421	2010-03-19	05:53:17	2455274.74534	1	-1.239	0.002	13.12	0.02
Mrk 421	2010-03-20	06:33:06	2455275.77299	1	-1.288	0.002	13.07	0.02
Mrk 421	2010-03-21	07:03:22	2455276.79400	1	-1.248	0.002	13.11	0.02
Mrk 421	2010-04-05	05:57:06	2455291.74799	1	-0.872	0.002	13.49	0.02
Mrk 421	2010-04-06	03:43:04	2455292.65491	1	-0.911	0.002	13.45	0.02
Mrk 421	2010-04-07	04:56:04	2455293.70560	1	-0.923	0.002	13.44	0.02
Mrk 421	2010-04-08	05:39:22	2455294.73567	1	-0.943	0.002	13.42	0.02
Mrk 421	2010-04-09	05:45:49	2455295.74015	1	-0.928	0.002	13.43	0.02
Mrk 421	2010-04-10	06:19:45	2455296.76372	1	-0.897	0.002	13.46	0.02
Mrk 421	2010-04-11	06:13:40	2455297.75949	1	-0.902	0.002	13.46	0.02
Mrk 421	2010-05-14	06:50:10	2455330.78484	1	-1.205	0.001	13.15	0.01
Mrk 421	2010-05-16	06:00:32	2455332.75037	1	-1.157	0.002	13.20	0.02
Mrk 421	2010-05-17	04:59:36	2455333.70806	1	-1.211	0.002	13.15	0.02
Mrk 421	2010-05-19	05:03:10	2455335.71053	1	-1.207	0.089	13.15	0.09
Mrk 421	2010-05-20	04:58:29	2455336.70728	1	-1.206	0.002	13.15	0.02
Mrk 421	2010-06-10	06:00:14	2455357.75016	1	-1.084	0.003	13.27	0.01
Mrk 421	2010-06-11	05:11:51	2455358.71656	1	-1.178	0.003	13.18	0.02
Mrk 421	2010-06-12	05:26:03	2455359.72642	1	-1.129	0.004	13.23	0.02
Mrk 421	2010-06-13	05:31:33	2455360.73024	1	-1.057	0.004	13.30	0.02
Mrk 421	2010-06-14	05:05:05	2455361.71186	1	-1.149	0.004	13.21	0.02
Mrk 421	2010-06-15	05:22:49	2455362.72418	1	-1.081	0.004	13.28	0.02
Mrk 421	2010-06-16	05:20:23	2455363.72249	1	-1.067	0.004	13.29	0.02
Mrk 421	2010-07-06	03:44:32	2455383.65593	1	-1.064	0.004	13.30	0.02
Mrk 421	2010-07-07	05:11:35	2455384.71637	1	-1.090	0.003	13.27	0.01