LEDA 194438
Observation
| Spectrum ID | 2492905_sp1 |
|---|---|
| Alt name | g2255519-294415 |
| z | 0.0822 |
| RA, Dec | 343.9662, -29.7376 |
| MJD | 60254.43 |
| SNR/Å B/R | 10.4/12.0 |
| Obs Airmass | 1.00 |
| SMSS ID | 2492905 |
| Closest SMSS | 6.62'', 2004499154 |
| SMSS Mean r6"ap | 15.6 ± 0.1 |
| 2MASS Kext | 11.8 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.018 |
| Power law αν | 0.46 ± 0.04 |
| log L5100,AGN | 44.27 ± 0.01 |
| log HβBr/[O III] | 0.69 ± 0.05 |
| log ML5100/M☉ | 8.63 ± 0.14 |
| log MHα/M☉ | 8.45 ± 0.07 |
| log MHβ/M☉ | 8.63 ± 0.14 |
| log M[O III]/M☉ | 8.47 ± 0.14 |
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 | 40.61 ± 0.24 | — | 166 ± 31 | 0.80 ± 0.24 |
| Hγ Broad | 41.59 ± 0.10 | 3331 ± 355 | 1255 ± 203 | 6.95 ± 0.86 |
| [O III] 4364 | 40.45 ± 0.30 | 234 ± 95 | 98 ± 40 | 0.60 ± 0.21 |
| He II Narrow | 40.33 ± 0.37 | 234 ± 95 | 98 ± 40 | 0.55 ± 0.22 |
| He II Broad | 40.99 ± 0.20 | 1287 ± 232 | 546 ± 98 | 1.90 ± 0.50 |
| Hβ Narrow | 40.78 ± 0.21 | — | 166 ± 31 | 1.55 ± 0.29 |
| Hβ Broad | 42.40 ± 0.02 | 6421 ± 1062 | 2668 ± 91 | 60.16 ± 1.38 |
| [O III] 5007 | 41.70 ± 0.04 | — | 166 ± 31 | 14.10 ± 0.32 |
| He I Narrow | 40.13 ± 0.37 | 234 ± 95 | 98 ± 40 | 0.61 ± 0.26 |
| He I Broad | 40.89 ± 0.18 | 1510 ± 305 | 641 ± 129 | 2.90 ± 0.67 |
| [O I] 6300 | 40.28 ± 0.20 | 234 ± 95 | 98 ± 40 | 0.99 ± 0.26 |
| Hα Narrow | 41.28 ± 0.15 | 234 ± 95 | 98 ± 40 | 9.64 ± 0.42 |
| Hα Broad | 42.88 ± 0.02 | 5071 ± 375 | 2356 ± 127 | 390.55 ± 2.03 |
| [N II] 6585 | 41.12 ± 0.12 | 234 ± 95 | 98 ± 40 | 7.62 ± 0.41 |
| [S II] 6718 | 40.61 ± 0.17 | 234 ± 95 | 98 ± 40 | 2.55 ± 0.45 |
| [S II] 6732 | 40.82 ± 0.19 | 234 ± 95 | 98 ± 40 | 3.70 ± 0.48 |
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 | 12.12 |
|---|---|
| Hβ Broad SNR | 4.57 |
| Hγ Broad SNR | 1.49 |
| AGN frac | 0.92 |
| Host frac | 0.08 |
| log L5100,Host | 43.19 |
| Fe II/Hβ | 0.54 |
| Fe II/[O III] | 2.48 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 0 |
balmer_snr | 1 |
hb_width | 0 |
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.