ESO 501-57

Observation

Spectrum ID	90657290_sp1
Alt name	g1037498-240952
z	0.0345
RA, Dec	159.4575, -24.1645
MJD	60783.42
SNR/Å B/R	10.7/27.7
Obs Airmass	1.03
SMSS ID	90657290
Closest SMSS	14.26'', 2148589766
SMSS Mean r_6"ap	16.1 ± 0.0
2MASS K_ext	11.9 ± 0.1

AGN Properties

Spectrum Type	Sy 1.5+
Quality Flag	good
AGN reference	6dFGS
MW E(B−V)	0.058
Power law α_ν	0.05 ± 0.13
log L_5100,AGN	42.51 ± 0.03
log Hβ_Br/[O III]	<-0.07
log M_L5100/M_☉	—
log M_Hα/M_☉	6.17 ± 0.10
log M_Hβ/M_☉	—
log M_{[O III]}/M_☉	—

Spatial extraction & sky subtraction region

Spaxel scale: 1 arcsec² — Flux units: erg s⁻¹ cm⁻² Å⁻¹
Apertures: object (solid), background (dashed)

Spectrum decomposition

Emission line measurements

Line	log L (erg s⁻¹)	FWHM (km s⁻¹)	σ (km s⁻¹)	EW (Å)
Hγ Narrow	—	—	—	—
Hγ Broad	—	—	—	—
[O III] 4364	—	—	—	—
He II Narrow	—	—	—	—
He II Broad	39.76 ± 0.25	2246 ± 62	954 ± 25	7.60 ± 2.53
Hβ Narrow	—	—	—	—
Hβ Broad	<40.15	—	—	—
[O III] 5007	40.22 ± 0.06	260 ± 63	361 ± 60	25.20 ± 2.12
He I Narrow	—	—	—	—
He I Broad	—	—	—	—
[O I] 6300	—	—	—	—
Hα Narrow	39.56 ± 0.07	243 ± 62	102 ± 25	9.45 ± 0.70
Hα Broad	40.23 ± 0.05	2362 ± 186	917 ± 31	43.99 ± 2.35
[N II] 6585	39.85 ± 0.03	243 ± 62	102 ± 25	18.78 ± 0.72
[S II] 6718	39.46 ± 0.07	243 ± 62	102 ± 25	7.82 ± 0.79
[S II] 6732	39.26 ± 0.11	243 ± 62	102 ± 25	5.05 ± 0.71

All narrow line widths are tied to narrow [O III] 5007Å. [O III] 5007Å and narrow Hβ include a second narrow component not tied to other narrow lines.

Emission summary

Hα Broad SNR	1.02
Hβ Broad SNR	0.61
Hγ Broad SNR	0.00
AGN frac	0.20
Host frac	0.80
log L_5100,Host	43.11
Fe II/Hβ	—
Fe II/[O III]	1.55

Quality flags

`spurious_hab/hbb`	0.0/0
`l5100`	1
`balmer`	2
`balmer_snr`	2
`hb_width`	2
`balmer_width`	2

Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.