ESO 337-8
Observation
| Spectrum ID | 211838425_sp1 |
|---|---|
| Alt name | g1902376-375847 |
| z | 0.0315 |
| RA, Dec | 285.6567, -37.9797 |
| MJD | 60524.5 |
| SNR/Å B/R | 16.3/29.2 |
| Obs Airmass | 1.01 |
| SMSS ID | 211838425 |
| Closest SMSS | 8.61'', 2309480833 |
| SMSS Mean r6"ap | 16.2 ± 0.1 |
| 2MASS Kext | 11.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.0 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.214 |
| Power law αν | 0.33 ± 0.14 |
| log L5100,AGN | 42.68 ± 0.03 |
| log HβBr/[O III] | 0.79 ± 0.06 |
| log ML5100/M☉ | 7.26 ± 0.06 |
| log MHα/M☉ | 6.94 ± 0.04 |
| log MHβ/M☉ | 7.23 ± 0.07 |
| log M[O III]/M☉ | 6.97 ± 0.08 |
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 | 39.19 ± 0.39 | 366 ± 64 | 183 ± 36 | 1.09 ± 0.69 |
| Hγ Broad | 40.18 ± 0.10 | — | 845 ± 34 | 11.12 ± 1.03 |
| [O III] 4364 | — | — | — | — |
| He II Narrow | 39.32 ± 0.20 | 359 ± 63 | 151 ± 25 | 1.84 ± 0.50 |
| He II Broad | 40.88 ± 0.04 | 17660 ± 62 | 7500 ± 25 | 66.02 ± 3.58 |
| Hβ Narrow | 39.71 ± 0.10 | 366 ± 64 | 183 ± 36 | 4.69 ± 0.95 |
| Hβ Broad | 40.84 ± 0.04 | 2895 ± 163 | 2837 ± 120 | 66.23 ± 2.94 |
| [O III] 5007 | 40.04 ± 0.04 | 366 ± 64 | 183 ± 36 | 11.10 ± 0.76 |
| He I Narrow | — | — | — | — |
| He I Broad | 40.21 ± 0.06 | 3631 ± 64 | 1542 ± 26 | 23.68 ± 1.74 |
| [O I] 6300 | — | — | — | — |
| Hα Narrow | 40.23 ± 0.02 | 359 ± 63 | 151 ± 25 | 32.72 ± 0.76 |
| Hα Broad | 41.21 ± 0.01 | 2886 ± 73 | 1207 ± 39 | 309.22 ± 2.90 |
| [N II] 6585 | 39.94 ± 0.04 | 359 ± 63 | 151 ± 25 | 16.76 ± 0.73 |
| [S II] 6718 | 39.31 ± 0.13 | 359 ± 63 | 151 ± 25 | 4.18 ± 0.75 |
| [S II] 6732 | 38.87 ± 0.31 | 359 ± 63 | 151 ± 25 | 1.51 ± 0.73 |
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 | 9.46 |
|---|---|
| Hβ Broad SNR | 3.54 |
| Hγ Broad SNR | 2.20 |
| AGN frac | 0.28 |
| Host frac | 0.72 |
| log L5100,Host | 43.08 |
| Fe II/Hβ | 0.51 |
| Fe II/[O III] | 3.21 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 0 |
balmer_snr | 1 |
hb_width | 2 |
balmer_width | 0 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.