2. The sample

In Table 1 (click here) we give a complete list of the presently known members and possible members of the M 81 group, including also some galaxies in the near background which had been classified as dwarf members before a velocity became available. This list was prepared by Binggeli (Van Driel et al. 1998) based on Börngen et al. (1982, 1984) and Karachentseva et al. (1985). A map showing the distribution of these objects on the sky can be found in Van Driel et al. (1998). The observational status of the dwarfs with respect to the photometry of both the present Paper I and the upcoming Paper II is given in the Cols. 11-14 of Table 1 (click here). A gallery of our best images, in terms of depth, seeing, and morphological detail, is given in Fig. 1 (click here). As the images from Paper II are usually superior due to a longer exposure time, we show them here instead of the somewhat less deep images from the first observing campaign. Deep R exposures of the objects suspected to be galactic cirrus clouds are presented in Figs. A1 (click here), A2 (click here) and A3 (click here).

The present photometry is based on the images of 32 objects which were taken on three nights in December 1992 and seven nights in March 1993 on the telescope of the OHP by P. Prugniel. They are 40 minute Cousins B and 20 minute Cousins R exposures. The camera used was the Tektronix CCD. One pixel corresponds to , giving a frame size of . Due to non-optimal weather conditions or contamination by nearby bright stars (the 1.2 m has a peculiar point spread function showing six "branches'' due to the hexagonal tube, added to an electronics problem causing cross-column streaks to one side of bright objects), we had to reject some of the images, so only about 20 galaxies could finally be successfully measured. Galaxies with less certain photometry are indicated in the last column of Table 1 (click here) with a colon. Table 1 (click here) lists the total sample imaged during the runs.

Figure 1: Best images of the M 81 group dwarf members listed in Table 1 (click here), in the same order. Where available, a 40 min. V image from Paper II is shown, except for BK 5N (B, 80 min) and UGC 5423 (V, 20 min), otherwise a 40 min. B image from the present photometry. The scale is the same for all pictures and is given by the size of one image side . North is up and east to the left

**Table 1:** Members and possible members (P) of the M 81 group, and near background galaxies (BG) in the same area

		Ident.	Ident.	R.A.	Dec.	Type	D₂₅			photometry/colours				Qual.
				(h m s)	( )			(mag)	(km/s)	B	V	R	I


	1.	UGC04305	HoII	08 13 53.5	70 52 13	Im	7.9¹	10.92¹	157
	2.	PGC139073	Kar 52	08 18 43.0	71 11 25	Im	1.8¹	18.8¹	114					:
	3.	UGC04459	DDO 53	08 29 33.3	66 21 08	Im	1.2	14.62	19
	4.	UGC04483	UGC 4483	08 32 07.0	69 57 16	Im	1.1	15.12	156					:
BG	5.	UGC04945	Kar 54	09 17 01.0	75 58 49	Im	0.8	15.75	659
BG	6.	UGC04998	UGC 4998	09 20 52.9	68 35 53	dS0:	1.15	14.47	632					:
	7.	UGC05139	HoI	09 36 00.9	71 24 55	Im	2.14	13.69	136					:
BG	8.	PGC027949	BK 1N	09 41 00.0	69 37 00	Im	-	17.41	570
	9.	NGC2976	NGC 2976	09 43 11.5	68 08 45	Sd	4.47	10.94	3					:
	10.	PGC028163	BK 2N	09 43 42.0	69 30 00	dE?	0.18	18.14
	11.	PGC028411	Kar 59	09 46 40.0	72 17 41	Im	0.3	17.1²
	12.	PGC028529	BK 3N	09 49 42.0	69 12 00	Im	-	18.89	-40
	13.	NGC3031	M 81	09 51 27.3	69 18 08	Sb	26.9¹	7.39¹	-34
	14.	NGC3034	M 82	09 51 43.6	69 55 00	Amorph	11.2¹	8.86¹	203
	15.	PGC028759	A952+69	09 53 27.0	69 31 18	Im		14.3³
	16.	PGC028731	Kar 61	09 53 01.0	68 49 48	dE,N	0.4	15.17
	17.	UGC05336	Ho IX	09 53 28.0	69 16 53	Im	2.5¹	14.07¹	46
	18.	NGC3077	NGC 3077	09 59 21.9	68 58 33	Amorph	5.4¹	10.32¹	14
	19.	PGC029167	Garland	09 59 54.0	68 55 30	Im			50
	20.	PGC029231	BK 5N	10 00 42.0	68 30 00	dE:	-	17.46
	21.	UGC05428	DDO 71	10 01 18.0	66 47 53	dE,N	0.4	15.95
P	22.	UGC05423	UGC 5423	10 01 25.3	70 36 27	BCD	0.9¹	14.86¹	349
	23.	UGC05442	Kar 64	10 03 07.2	68 04 20	dE,N	0.56	15.46
	24.	PGC030664	DDO 78	10 22 48.0	67 54 40	dE	2.0	14.3²
BG	25.	UGC05658	UGC 5658	10 23 52.6	71 29 34	Im	1.0	15.0²	1159
	26.	IC2574	IC 2574	10 24 41.3	68 40 18	Sm	13.2¹	10.33¹	47
	27.	UGC05692	DDO 82	10 26 48.0	70 52 33	Sm/BCD:	1.85	13.52	40
	28.	PGC031286	BK 6N	10 31 00.0	66 16 00	dE		16.0 ²
P	29.		BKK 1	10 45 43.4	65 02 43	?		17.4²
P	30.	PGC032385	UGCA 220	10 46 06.5	64 59 11	Im:	-	16.77
P	31.	UGC05918	DDO 87	10 46 17.5	65 47 43	Im:	0.7	15.17	338
P	32.		BKK 4	10 46 59.0	65 03 52	?		16.3²
P	33.	PGC032467	BK 7N	10 47 06.0	65 22 00	?		16.2²
P	34.		BKK 6	10 47 13.2	65 00 34	?		16.5²
P	35.		BKK 7	10 47 22.1	65 05 46	?		16.5²
	36.	PGC032667	Kar 73	10 49 30.0	69 48 55	Im	0.2	17.20	115
P	37.	PGC032710	BKK 8	10 50 30.0	65 31 20	?		15.5²
P	38.		BKK 9	10 50 54.0	65 17 00	?		16.1²
P	39.	PGC032757	BK 8N	10 51 07.4	65 28 09	?	-	16.50						:
P	40.	PGC032769	BKK 11	10 51 20.0	65 32 50	?		15.8²
	41.	PGC033305	Kar 74	10 59 05.2	70 32 01	dE/Im:	0.2	17.93						:

Notes: Column 4: BKK refers to Börngen et al. (1984). Columns 5 and 6: 1950 epoch coordinates taken from the NED.
Column 7: Dwarf type reckoned by B.B. on the system of Sandage & Binggeli (1984),"?'' = galactic cirrus? (see Appendix A).
Columns 8 and 9: Diameter at and total apparent blue magnitude from the present photometry, from
Schmidt & Boller (1992) (¹), Börngen et al. (1984) (²) and from other sources compiled by one of us (B.B.) (³).
A "-'' means the galaxy is nowhere above . Column 10: heliocentric velocity from Van Driel et al. (1998).
Columns 11-14 indicate the inclusion in the OHP observing programme: circle = present Paper ( image only, with photometry),
= Paper II. The last column indicates galaxies with less certain photometry with a colon.

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