Table 4: Spectroscopic properties of the FIRBACK identified sources. The quoted uncertainty for velocities is the internal (1 $\sigma$ ) error, and does not include the systematics (see text). Emission (or absorption) lines shown in brackets are seen, but not used for the velocity determination because of poor S/N. The H $\alpha$ flux is given, when conditions were photometric, in units of 10^-16 erg/cm²/s. For source FN1-040, z = 0.45, see Chapman et al. (2002).
ID Coordinates^a cz (km s^-1) r' Mag. Emission (H $\alpha$ flux) Absorption Comments

FN1-000 160552.8+540651 43 604 $\pm$ 87 17.94 H $\alpha$ (183), [NII], [OI], [NI], H $\beta$ , [OIII] Na Liner

H $\gamma$ , [OII], (HeI)

FN1-001 160736.6+535730 9004 $\pm$ 51 16.67 H $\alpha$ (93.9), [NII], [SII], H $\beta$ , [OIII], HeI Na, Ca, (Mg), G, H, K

FN1-002 161005.8+541029 19 119 $\pm$ 119 17.73 H $\alpha$ (13.9), [NII], [SII], H $\beta$ , [OII] Na, Mg, G, H, K

FN1-003 161254.1+545526 19 481 $\pm$ 90 17.13 H $\alpha$ (21.7), [NII], [SII], [OII] Na, (H $\beta$ ), Mg, Ca, G, H, K Em. with small EW

FN1-004N 161109.5+535807 19 107 $\pm$ 85 16.84 H $\alpha$ (9.5), [NII], [SII], [OIII] Na, H $\beta$ , G, Mg Sey2, [NII]/H $\alpha$ > 1

FN1-004S 161107.2+535711 19 208 $\pm$ 88 19.03 H $\alpha$ (5.5), [NII], [SII] Na, G

FN1-005 160443.4+543331 86 400^b 19.22

FN1-006 160433.9+544432 22 608 $\pm$ 63 17.26 H $\alpha$ (34.8), [NII], [SII], [OII] Na, Mg, H $\beta$ , G, H $\delta$ , H, K

FN1-007 161331.2+541630 18 435 $\pm$ 41 17.18 H $\alpha$ (59.1), [NII], [SII], [OII] Na, G, H, K

FN1-009 160803.7+545302 15 746 $\pm$ 865 16.58 H $\alpha$ (17.0), [NII], [SII] Na, Mg, Ca, H $\beta$ , H $\gamma$ , H $\delta$ Liner

[OI], [OIII], [OII] G, H, K

FN1-011 160808.6+535242 19 326 $\pm$ 48 17.84 H $\alpha$ , [NII], [SII], H $\beta$ Na, Ca, G, (H), K

FN1-012 161214.0+540833 19 770 $\pm$ 73 17.88 H $\alpha$ (32.7), [NII], [SII], H $\beta$ , [OIII], [OII] Na, Mg, Ca, H, K

FN1-014 161551.4+541536 21 000^c 19.20

FN1-015 160724.7+541212 70 183 $\pm$ 58 18.89 H $\beta$ , [OII] H, K

FN1-016 16-738.0+544602 27 579 $\pm$ 85 17.09 H $\alpha$ (48.7), [NII], [OII] Na, (H $\beta$ ), (H $\gamma$ ), H $\delta$ , H, K

FN1-018 161407.1+541920 25 598 $\pm$ 105 18.92 H $\alpha$ (7.9), [NII], ([OIII]), [OII] Na AGN ([NII]/H $\alpha$ $\sim$ 1)

FN1-020 160812.3+545526 3000^c 19.72

FN1-021 161308.0+545142 19 349 $\pm$ 39 18.18 H $\alpha$ , [NII], [SII], H $\beta$ Na

FN1-021B 161319.2+545138 19 983 $\pm$ 18 18.04 H $\alpha$ , [NII], [SII], H $\beta$ , [OIII]

FN1-023 160835.4+535020 18 780 $\pm$ 26 18.94 H $\alpha$ (26.1), [NII], [SII], H $\beta$ , [OIII], [OII] Na

FN1-024 160937.5+541259 25 770 $\pm$ 60 18.36 H $\alpha$ (20.1), [NII], H $\beta$ , ([OII]) Na

FN1-026 161436.9+541635 23 835 $\pm$ 12 19.10 H $\alpha$ (4.8), [NII] (Na), (H $\delta$ )

FN1-031 161103.7+544322 18 840 $\pm$ 78 17.69 H $\alpha$ (8.6), [NII], [SII], ([OIII]) H, K

FN1-033 161301.1+541003 41 173 $\pm$ 65 18.47 H $\beta$ , [OII] Na, G, H, (K)

FN1-035 161527.7+543414 40 820 $\pm$ 72 18.11 H $\alpha$ , [NII], [OII] Na, Mg, (H $\beta$ ), H, K

FN1-038 160747.3+534836 32 192 $\pm$ 20 19.26 H $\alpha$ (10.1), [NII], [SII], H $\beta$ , [OIII]

FN1-039 160848.9+545151 80 700^b 20.18

FN1-041 160814.2+542836 35 995 $\pm$ 46 18.89 H $\alpha$ , [NII], H $\beta$ , [OIII], H $\gamma$

FN1-043 160553.4+542226 63 470 $\pm$ 53 18.69 H $\alpha$ , [NII], [OII] (G), H

^a J2000 position of the optical counterpart.
^b Chapman (private communication).
^c Photometric estimate (Babbedge et al. 2004).

**Table 4:** Spectroscopic properties of the FIRBACK identified sources. The quoted uncertainty for velocities is the internal (1 $\sigma$ ) error, and does not include the systematics (see text). Emission (or absorption) lines shown in brackets are seen, but not used for the velocity determination because of poor S/N. The H $\alpha$ flux is given, when conditions were photometric, in units of 10^-16 erg/cm²/s. For source FN1-040, z = 0.45, see Chapman et al. (2002).
ID	Coordinates^a	cz (km s^-1)	r' Mag.	Emission (H $\alpha$ flux)	Absorption	Comments
FN1-000	160552.8+540651	43 604 $\pm$ 87	17.94	H $\alpha$ (183), [NII], [OI], [NI], H $\beta$ , [OIII]	Na	Liner
				H $\gamma$ , [OII], (HeI)
FN1-001	160736.6+535730	9004 $\pm$ 51	16.67	H $\alpha$ (93.9), [NII], [SII], H $\beta$ , [OIII], HeI	Na, Ca, (Mg), G, H, K
FN1-002	161005.8+541029	19 119 $\pm$ 119	17.73	H $\alpha$ (13.9), [NII], [SII], H $\beta$ , [OII]	Na, Mg, G, H, K
FN1-003	161254.1+545526	19 481 $\pm$ 90	17.13	H $\alpha$ (21.7), [NII], [SII], [OII]	Na, (H $\beta$ ), Mg, Ca, G, H, K	Em. with small EW
FN1-004N	161109.5+535807	19 107 $\pm$ 85	16.84	H $\alpha$ (9.5), [NII], [SII], [OIII]	Na, H $\beta$ , G, Mg	Sey2, [NII]/H $\alpha$ > 1
FN1-004S	161107.2+535711	19 208 $\pm$ 88	19.03	H $\alpha$ (5.5), [NII], [SII]	Na, G
FN1-005	160443.4+543331	86 400^b	19.22
FN1-006	160433.9+544432	22 608 $\pm$ 63	17.26	H $\alpha$ (34.8), [NII], [SII], [OII]	Na, Mg, H $\beta$ , G, H $\delta$ , H, K
FN1-007	161331.2+541630	18 435 $\pm$ 41	17.18	H $\alpha$ (59.1), [NII], [SII], [OII]	Na, G, H, K
FN1-009	160803.7+545302	15 746 $\pm$ 865	16.58	H $\alpha$ (17.0), [NII], [SII]	Na, Mg, Ca, H $\beta$ , H $\gamma$ , H $\delta$	Liner
				[OI], [OIII], [OII]	G, H, K
FN1-011	160808.6+535242	19 326 $\pm$ 48	17.84	H $\alpha$ , [NII], [SII], H $\beta$	Na, Ca, G, (H), K
FN1-012	161214.0+540833	19 770 $\pm$ 73	17.88	H $\alpha$ (32.7), [NII], [SII], H $\beta$ , [OIII], [OII]	Na, Mg, Ca, H, K
FN1-014	161551.4+541536	21 000^c	19.20
FN1-015	160724.7+541212	70 183 $\pm$ 58	18.89	H $\beta$ , [OII]	H, K
FN1-016	16-738.0+544602	27 579 $\pm$ 85	17.09	H $\alpha$ (48.7), [NII], [OII]	Na, (H $\beta$ ), (H $\gamma$ ), H $\delta$ , H, K
FN1-018	161407.1+541920	25 598 $\pm$ 105	18.92	H $\alpha$ (7.9), [NII], ([OIII]), [OII]	Na	AGN ([NII]/H $\alpha$ $\sim$ 1)
FN1-020	160812.3+545526	3000^c	19.72
FN1-021	161308.0+545142	19 349 $\pm$ 39	18.18	H $\alpha$ , [NII], [SII], H $\beta$	Na
FN1-021B	161319.2+545138	19 983 $\pm$ 18	18.04	H $\alpha$ , [NII], [SII], H $\beta$ , [OIII]
FN1-023	160835.4+535020	18 780 $\pm$ 26	18.94	H $\alpha$ (26.1), [NII], [SII], H $\beta$ , [OIII], [OII]	Na
FN1-024	160937.5+541259	25 770 $\pm$ 60	18.36	H $\alpha$ (20.1), [NII], H $\beta$ , ([OII])	Na
FN1-026	161436.9+541635	23 835 $\pm$ 12	19.10	H $\alpha$ (4.8), [NII]	(Na), (H $\delta$ )
FN1-031	161103.7+544322	18 840 $\pm$ 78	17.69	H $\alpha$ (8.6), [NII], [SII], ([OIII])	H, K
FN1-033	161301.1+541003	41 173 $\pm$ 65	18.47	H $\beta$ , [OII]	Na, G, H, (K)
FN1-035	161527.7+543414	40 820 $\pm$ 72	18.11	H $\alpha$ , [NII], [OII]	Na, Mg, (H $\beta$ ), H, K
FN1-038	160747.3+534836	32 192 $\pm$ 20	19.26	H $\alpha$ (10.1), [NII], [SII], H $\beta$ , [OIII]
FN1-039	160848.9+545151	80 700^b	20.18
FN1-041	160814.2+542836	35 995 $\pm$ 46	18.89	H $\alpha$ , [NII], H $\beta$ , [OIII], H $\gamma$
FN1-043	160553.4+542226	63 470 $\pm$ 53	18.69	H $\alpha$ , [NII], [OII]	(G), H

Source LaTeX | All tables | In the text

	1 Introduction
	2 Complementary observations
	3 Identifications: method and results
	4 Optical properties of identified sources
	5 Mid and far-IR properties
	6 The radio-FIR relation
	7 Star formation rates
	8 Discussion and conclusions
	References
	Online Material