Table 1: Atomic data for H and He I/II line formation in the visual and NIR.
$\lambda~$ (Å) Transition $\log gf$ Acc. Src. Broad. Comment

H I:

3797.90 2-10 -1.511 AA GRC SH

3835.38 2-9 -1.362 AA GRC SH

3889.05 2-8 -1.192 AA GRC SH

3970.07 2-7 -0.993 AA GRC SH blend with interstellar Ca II H

4101.73 2-6 -0.753 AA GRC SH

4340.46 2-5 -0.447 AA GRC SH

4861.32 2-4 -0.020 AA GRC SH

6562.80 2-3 0.710 AA GRC SH

8413.32 3-19 -1.823 AA GRC SH

8437.96 3-18 -1.748 AA GRC SH

8467.26 3-17 -1.670 AA GRC SH

8502.49 3-16 -1.586 AA GRC SH

8545.39 3-15 -1.495 AA GRC SH

8598.39 3-14 -1.398 AA GRC SH

8665.02 3-13 -1.292 AA GRC SH

8750.47 3-12 -1.175 AA GRC SH

He II:

3796.34 4-20 -1.487 AA GRC G60, G67 blend with H $\vartheta$

3813.50 4-19 -1.414 AA GRC G60, G67

3833.81 4-18 -1.337 AA GRC G60, G67 blend with H $\eta$

3858.08 4-17 -1.255 AA GRC G60, G67

3887.45 4-16 -1.166 AA GRC G60, G67 blend with H $\zeta$

3923.49 4-15 -1.071 AA GRC SB^a blend with He I

3968.44 4-14 -0.967 AA GRC SB^a blend with H $\epsilon$

4025.61 4-13 -0.852 AA GRC SB^a blend with He I

4100.05 4-12 -0.725 AA GRC SB blend with H $\delta$

4199.84 4-11 -0.582 AA GRC SB blend with N III

4338.67 4-10 -0.417 AA GRC SB blend with H $\gamma$

4541.59 4-9 -0.223 AA GRC SB

4685.70 3-4 1.181 AA GRC SB

4859.32 4-8 0.014 AA GRC SB blend with H $\beta$

5411.52 4-7 0.321 AA GRC SB

6560.09 4-6 0.759 AA GRC SB blend with H $\alpha$

He I:

3819.60 2p ³P $^{\rm o}$ -6d ³D -0.931 A FTS DSB broadening data to be improved, forbidden components missing

3819.61 2p ³P $^{\rm o}$ -6d ³D -1.153 A FTS DSB ...

3819.76 2p ³P $^{\rm o}$ -6d ³D -1.630 A FTS DSB ...

3867.47 2p ³P $^{\rm o}$ -6s ³S -2.037 A FTS DSB

3867.48 2p ³P $^{\rm o}$ -6s ³S -2.260 A FTS DSB

3867.63 2p ³P $^{\rm o}$ -6s ³S -2.737 A FTS DSB

3888.60 2s ³S-3p ³P $^{\rm o}$ -1.668 AA SPA G64 near core of H $\zeta$

3888.65 2s ³S-3p ³P $^{\rm o}$ -0.765 AA SPA G64 ...

3926.54 2p ¹P $^{\rm o}$ -8d ¹D -1.652 A FTS DSB broadening data to be improved, blends by Si III & S II/III

3935.95 2p ¹P $^{\rm o}$ -8s ¹S -2.772 A FTS DSB

3964.73 2s ¹S-4p ¹P $^{\rm o}$ -1.290 A FTS G64 in wing of H $\epsilon$

4009.26 2p ¹P $^{\rm o}$ -7d ¹D -1.449 A FTS DSB

4023.98 2p ¹P $^{\rm o}$ -7s ¹S -2.572 A FTS DSB

4026.18 2p ³P $^{\rm o}$ -5d ³D -2.600 A FTS S

4026.19 2p ³P $^{\rm o}$ -5d ³D -0.633 A FTS S

4026.20 2p ³P $^{\rm o}$ -5d ³D -0.851 A FTS S

4026.36 2p ³P $^{\rm o}$ -5d ³D -1.328 A FTS S

4120.81 2p ³P $^{\rm o}$ -5s ³S -1.722 A FTS GBKO blends with O II, C III, & Fe III

4120.82 2p ³P $^{\rm o}$ -5s ³S -1.945 A FTS GBKO ...

4120.99 2p ³P $^{\rm o}$ -5s ³S -2.422 A FTS GBKO ...

4143.76 2p ¹P $^{\rm o}$ -6d ¹D -1.203 A FTS DSB numerous blends with O II & N II

4168.97 2p ¹P $^{\rm o}$ -6s ¹S -2.332 A FTS DSB strong blend with O II

4387.93 2p ¹P $^{\rm o}$ -5d ¹D -0.886 A FTS S

4437.55 2p ¹P $^{\rm o}$ -5s ¹S -2.026 A FTS GBKO continuum may be affected by diffuse interstellar band

4471.47 2p ³P $^{\rm o}$ -4d ³D -0.210 A FTS BCS69

4471.49 2p ³P $^{\rm o}$ -4d ³D -0.432 A FTS BCS69

4471.68 2p ³P $^{\rm o}$ -4d ³D -0.909 A FTS BCS69

4713.14 2p ³P $^{\rm o}$ -4s ³S -1.276 A FTS G64

4713.16 2p ³P $^{\rm o}$ -4s ³S -1.498 A FTS G64

4713.38 2p ³P $^{\rm o}$ -4s ³S -1.976 A FTS G64

4921.93 2p ¹P $^{\rm o}$ -4d ¹D -0.442 A FTS BCS69 treatment of forbidden component to be improved

5015.68 2s ¹S-3p ¹P $^{\rm o}$ -0.820 AA SPA G64

5047.74 2p ¹P $^{\rm o}$ -4s ¹S -1.600 A FTS GBKO

5875.60 2p ³P $^{\rm o}$ -3d ³D -1.511 A FTS G64

5875.61 2p ³P $^{\rm o}$ -3d ³D 0.480 A FTS G64

5875.63 2p ³P $^{\rm o}$ -3d ³D -0.338 A FTS G64

5875.64 2p ³P $^{\rm o}$ -3d ³D 0.138 A FTS G64

5875.97 2p ³P $^{\rm o}$ -3d ³D -0.214 A FTS G64

6678.15 2p ¹P $^{\rm o}$ -3d ¹D 0.328 A FTS G64

7065.18 2p ³P $^{\rm o}$ -3s ³S -0.458 A FTS GBKO weak telluric line contamination

7065.22 2p ³P $^{\rm o}$ -3s ³S -0.680 A FTS GBKO ...

7065.71 2p ³P $^{\rm o}$ -3s ³S -1.157 A FTS GBKO ...

7281.35 2p ¹P $^{\rm o}$ -3s ¹S -0.854 A FTS GBKO strong telluric line contamination

10829.09 2s ³S-2p ³P $^{\rm o}$ -0.745 AA SPA G64

10830.25 2s ³S-2p ³P $^{\rm o}$ -0.268 AA SPA G64

10830.34 2s ³S-2p ³P $^{\rm o}$ -0.046 AA SPA G64

20586.92^b 2s ¹S-2p ¹P $^{\rm o}$ -0.424 AA SPA DSB strong telluric line contamination

21125.79^b 3p ³P $^{\rm o}$ -4s ³S -0.138 A FTS DSB

21125.89^b 3p ³P $^{\rm o}$ -4s ³S -0.360 A FTS DSB

21127.09^b 3p ³P $^{\rm o}$ -4s ³S -0.837 A FTS DSB

21137.80^b 3p ¹P $^{\rm o}$ -4s ¹S -0.527 A FTS DSB

^a Unpublished, priv. comm.; ^b Vacuum wavelengths.
Accuracy indicators - uncertainties within: AA: 1%; A: 3%.
Sources of gf-values: FTS: Fernley et al. (1987); GRC: Green et al. (1957); SPA: Schiff et al. (1971) sources for Stark broadening parameters: BCS69: Barnard et al. (1969); C: Cowley (1971); DSB: Dimitrijevic & Sahal-Bréchot (1990); G60: Griem (1960); G64: Griem (1964); G67: Griem (1967); GBKO: Griem et al. (1962); S: Shamey (1969); SB: Schöning & Butler (1989); SH: Stehlé & Hutcheon (1999).

**Table 1:** Atomic data for H and He I/II line formation in the visual and NIR.
$\lambda~$ (Å)	Transition	$\log gf$	Acc.	Src.	Broad.	Comment
H I:
3797.90	2-10	-1.511	AA	GRC	SH
3835.38	2-9	-1.362	AA	GRC	SH
3889.05	2-8	-1.192	AA	GRC	SH
3970.07	2-7	-0.993	AA	GRC	SH	blend with interstellar Ca II H
4101.73	2-6	-0.753	AA	GRC	SH
4340.46	2-5	-0.447	AA	GRC	SH
4861.32	2-4	-0.020	AA	GRC	SH
6562.80	2-3	0.710	AA	GRC	SH
8413.32	3-19	-1.823	AA	GRC	SH
8437.96	3-18	-1.748	AA	GRC	SH
8467.26	3-17	-1.670	AA	GRC	SH
8502.49	3-16	-1.586	AA	GRC	SH
8545.39	3-15	-1.495	AA	GRC	SH
8598.39	3-14	-1.398	AA	GRC	SH
8665.02	3-13	-1.292	AA	GRC	SH
8750.47	3-12	-1.175	AA	GRC	SH
He II:
3796.34	4-20	-1.487	AA	GRC	G60, G67	blend with H $\vartheta$
3813.50	4-19	-1.414	AA	GRC	G60, G67
3833.81	4-18	-1.337	AA	GRC	G60, G67	blend with H $\eta$
3858.08	4-17	-1.255	AA	GRC	G60, G67
3887.45	4-16	-1.166	AA	GRC	G60, G67	blend with H $\zeta$
3923.49	4-15	-1.071	AA	GRC	SB^a	blend with He I
3968.44	4-14	-0.967	AA	GRC	SB^a	blend with H $\epsilon$
4025.61	4-13	-0.852	AA	GRC	SB^a	blend with He I
4100.05	4-12	-0.725	AA	GRC	SB	blend with H $\delta$
4199.84	4-11	-0.582	AA	GRC	SB	blend with N III
4338.67	4-10	-0.417	AA	GRC	SB	blend with H $\gamma$
4541.59	4-9	-0.223	AA	GRC	SB
4685.70	3-4	1.181	AA	GRC	SB
4859.32	4-8	0.014	AA	GRC	SB	blend with H $\beta$
5411.52	4-7	0.321	AA	GRC	SB
6560.09	4-6	0.759	AA	GRC	SB	blend with H $\alpha$
He I:
3819.60	2p ³P $^{\rm o}$ -6d ³D	-0.931	A	FTS	DSB	broadening data to be improved, forbidden components missing
3819.61	2p ³P $^{\rm o}$ -6d ³D	-1.153	A	FTS	DSB	...
3819.76	2p ³P $^{\rm o}$ -6d ³D	-1.630	A	FTS	DSB	...
3867.47	2p ³P $^{\rm o}$ -6s ³S	-2.037	A	FTS	DSB
3867.48	2p ³P $^{\rm o}$ -6s ³S	-2.260	A	FTS	DSB
3867.63	2p ³P $^{\rm o}$ -6s ³S	-2.737	A	FTS	DSB
3888.60	2s ³S-3p ³P $^{\rm o}$	-1.668	AA	SPA	G64	near core of H $\zeta$
3888.65	2s ³S-3p ³P $^{\rm o}$	-0.765	AA	SPA	G64	...
3926.54	2p ¹P $^{\rm o}$ -8d ¹D	-1.652	A	FTS	DSB	broadening data to be improved, blends by Si III & S II/III
3935.95	2p ¹P $^{\rm o}$ -8s ¹S	-2.772	A	FTS	DSB
3964.73	2s ¹S-4p ¹P $^{\rm o}$	-1.290	A	FTS	G64	in wing of H $\epsilon$
4009.26	2p ¹P $^{\rm o}$ -7d ¹D	-1.449	A	FTS	DSB
4023.98	2p ¹P $^{\rm o}$ -7s ¹S	-2.572	A	FTS	DSB
4026.18	2p ³P $^{\rm o}$ -5d ³D	-2.600	A	FTS	S
4026.19	2p ³P $^{\rm o}$ -5d ³D	-0.633	A	FTS	S
4026.20	2p ³P $^{\rm o}$ -5d ³D	-0.851	A	FTS	S
4026.36	2p ³P $^{\rm o}$ -5d ³D	-1.328	A	FTS	S
4120.81	2p ³P $^{\rm o}$ -5s ³S	-1.722	A	FTS	GBKO	blends with O II, C III, & Fe III
4120.82	2p ³P $^{\rm o}$ -5s ³S	-1.945	A	FTS	GBKO	...
4120.99	2p ³P $^{\rm o}$ -5s ³S	-2.422	A	FTS	GBKO	...
4143.76	2p ¹P $^{\rm o}$ -6d ¹D	-1.203	A	FTS	DSB	numerous blends with O II & N II
4168.97	2p ¹P $^{\rm o}$ -6s ¹S	-2.332	A	FTS	DSB	strong blend with O II
4387.93	2p ¹P $^{\rm o}$ -5d ¹D	-0.886	A	FTS	S
4437.55	2p ¹P $^{\rm o}$ -5s ¹S	-2.026	A	FTS	GBKO	continuum may be affected by diffuse interstellar band
4471.47	2p ³P $^{\rm o}$ -4d ³D	-0.210	A	FTS	BCS69
4471.49	2p ³P $^{\rm o}$ -4d ³D	-0.432	A	FTS	BCS69
4471.68	2p ³P $^{\rm o}$ -4d ³D	-0.909	A	FTS	BCS69
4713.14	2p ³P $^{\rm o}$ -4s ³S	-1.276	A	FTS	G64
4713.16	2p ³P $^{\rm o}$ -4s ³S	-1.498	A	FTS	G64
4713.38	2p ³P $^{\rm o}$ -4s ³S	-1.976	A	FTS	G64
4921.93	2p ¹P $^{\rm o}$ -4d ¹D	-0.442	A	FTS	BCS69	treatment of forbidden component to be improved
5015.68	2s ¹S-3p ¹P $^{\rm o}$	-0.820	AA	SPA	G64
5047.74	2p ¹P $^{\rm o}$ -4s ¹S	-1.600	A	FTS	GBKO
5875.60	2p ³P $^{\rm o}$ -3d ³D	-1.511	A	FTS	G64
5875.61	2p ³P $^{\rm o}$ -3d ³D	0.480	A	FTS	G64
5875.63	2p ³P $^{\rm o}$ -3d ³D	-0.338	A	FTS	G64
5875.64	2p ³P $^{\rm o}$ -3d ³D	0.138	A	FTS	G64
5875.97	2p ³P $^{\rm o}$ -3d ³D	-0.214	A	FTS	G64
6678.15	2p ¹P $^{\rm o}$ -3d ¹D	0.328	A	FTS	G64
7065.18	2p ³P $^{\rm o}$ -3s ³S	-0.458	A	FTS	GBKO	weak telluric line contamination
7065.22	2p ³P $^{\rm o}$ -3s ³S	-0.680	A	FTS	GBKO	...
7065.71	2p ³P $^{\rm o}$ -3s ³S	-1.157	A	FTS	GBKO	...
7281.35	2p ¹P $^{\rm o}$ -3s ¹S	-0.854	A	FTS	GBKO	strong telluric line contamination
10829.09	2s ³S-2p ³P $^{\rm o}$	-0.745	AA	SPA	G64
10830.25	2s ³S-2p ³P $^{\rm o}$	-0.268	AA	SPA	G64
10830.34	2s ³S-2p ³P $^{\rm o}$	-0.046	AA	SPA	G64
20586.92^b	2s ¹S-2p ¹P $^{\rm o}$	-0.424	AA	SPA	DSB	strong telluric line contamination
21125.79^b	3p ³P $^{\rm o}$ -4s ³S	-0.138	A	FTS	DSB
21125.89^b	3p ³P $^{\rm o}$ -4s ³S	-0.360	A	FTS	DSB
21127.09^b	3p ³P $^{\rm o}$ -4s ³S	-0.837	A	FTS	DSB
21137.80^b	3p ¹P $^{\rm o}$ -4s ¹S	-0.527	A	FTS	DSB

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