**Table 1:** Parameters of the BATC filters and statistics of observations for M 31.
No.	Name	cw(Å)^a	Exp. (h)	N.img^b	rms^c
1	BATC03	4210	01:00	03	0.015
2	BATC04	4546	05:30	17	0.009
3	BATC05	4872	03:30	11	0.015
4	BATC06	5250	02:20	12	0.006
5	BATC07	5785	02:15	07	0.003
6	BATC08	6075	01:40	05	0.003
7	BATC09	6710	00:45	03	0.003
8	BATC10	7010	03:00	12	0.008
9	BATC11	7530	02:00	06	0.004
10	BATC12	8000	04:00	12	0.003
11	BATC13	8510	01:30	05	0.004
12	BATC14	9170	05:50	18	0.003
13	BATC15	9720	04:00	12	0.009

^a Central wavelength for each BATC filter.
^b Image numbers for each BATC filter.
^c Calibration error, in magnitude, for each filter as obtained from the standard stars.

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