Table 4: Spectral analysis. The error in the redshift is $\approx$ $\pm$ 0.002. The codes for the last two columns are: 0-absorption emission line galaxy; 1-narrow emission line galaxy; 2-star; 3-contamination by the filament; 4-spectra very noisy.
Slit Pos. Object Spectral features (> $3\sigma$ ) Redshift Type Notes

1, 3 NGC 7603B CaH&K, MgI, NaI, etc. 0.056 0

1 #1 OII, H $\beta$ , OIII, OI, H $\alpha$ 0.394 1

1 #2 OII, NeIII, H $\beta$ , OIII, H $\alpha$ 0.245 1

1 Filament H $\beta$ , MgI, NaI 0.030 Abs. 4, Paper I

2 #17 H $\alpha$ , H $\beta$ 0 2 3

2 3.6 $^{\prime\prime}$ -WNW of #17 - - - 4

2 #19 - - - 4

2, 3 #21 OIII₅₀₀₇, H $\alpha$ , NII, SII 0.117 1

2, 3 #22 OII, H $\beta$ , H $\alpha$ 0.401 1

3 #23 H $\alpha$ 0.246 1

**Table 4:** Spectral analysis. The error in the redshift is $\approx$ $\pm$ 0.002. The codes for the last two columns are: 0-absorption emission line galaxy; 1-narrow emission line galaxy; 2-star; 3-contamination by the filament; 4-spectra very noisy.
Slit Pos.	Object	Spectral features (> $3\sigma$ )	Redshift	Type	Notes
1, 3	NGC 7603B	CaH&K, MgI, NaI, etc.	0.056	0
1	#1	OII, H $\beta$ , OIII, OI, H $\alpha$	0.394	1
1	#2	OII, NeIII, H $\beta$ , OIII, H $\alpha$	0.245	1
1	Filament	H $\beta$ , MgI, NaI	0.030	Abs.	4, Paper I
2	#17	H $\alpha$ , H $\beta$	0	2	3
2	3.6 $^{\prime\prime}$ -WNW of #17	-	-	-	4
2	#19	-	-	-	4
2, 3	#21	OIII₅₀₀₇, H $\alpha$ , NII, SII	0.117	1
2, 3	#22	OII, H $\beta$ , H $\alpha$	0.401	1
3	#23	H $\alpha$	0.246	1

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