MCG-04-09-052
Observation
| Spectrum ID | 20851826_sp1 |
|---|---|
| Alt name | g0342037-211440 |
| z | 0.0142 |
| RA, Dec | 55.5156, -21.2446 |
| MJD | 60260.53 |
| SNR/Å B/R | 30.5/48.7 |
| Obs Airmass | 1.10 |
| SMSS ID | 20851826 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 13.8 ± 0.1 |
| 2MASS Kext | 8.6 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.8 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.027 |
| Power law αν | -0.17 ± 0.11 |
| log L5100,AGN | 42.62 ± 0.03 |
| log HβBr/[O III] | -0.80 ± 0.14 |
| log ML5100/M☉ | 6.46 ± 0.04 |
| log MHα/M☉ | 6.60 ± 0.06 |
| log MHβ/M☉ | 5.85 ± 0.11 |
| log M[O III]/M☉ | 6.32 ± 0.06 |
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 | 38.95 ± 0.26 | 274 ± 62 | 116 ± 25 | 0.81 ± 0.30 |
| He II Narrow | 38.65 ± 0.37 | 274 ± 62 | 116 ± 25 | 0.47 ± 0.28 |
| He II Broad | 38.82 ± 0.47 | 1178 ± 62 | 500 ± 25 | 0.68 ± 0.58 |
| Hβ Narrow | 39.13 ± 0.19 | 326 ± 63 | 151 ± 25 | 1.51 ± 0.34 |
| Hβ Broad | 39.50 ± 0.14 | 1184 ± 25 | 315 ± 25 | 3.00 ± 0.63 |
| [O III] 5007 | 40.30 ± 0.01 | 326 ± 63 | 151 ± 25 | 23.48 ± 0.40 |
| He I Narrow | — | — | — | — |
| He I Broad | — | — | — | — |
| [O I] 6300 | 39.20 ± 0.10 | 274 ± 62 | 116 ± 25 | 2.86 ± 0.40 |
| Hα Narrow | 39.72 ± 0.04 | 274 ± 62 | 116 ± 25 | 10.12 ± 0.41 |
| Hα Broad | 40.71 ± 0.01 | 2765 ± 64 | 1006 ± 25 | 98.34 ± 1.30 |
| [N II] 6585 | 40.19 ± 0.01 | 274 ± 62 | 116 ± 25 | 30.10 ± 0.44 |
| [S II] 6718 | 39.62 ± 0.04 | 274 ± 62 | 116 ± 25 | 8.40 ± 0.40 |
| [S II] 6732 | 39.58 ± 0.04 | 274 ± 62 | 116 ± 25 | 7.74 ± 0.44 |
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 | 5.78 |
|---|---|
| Hβ Broad SNR | 1.13 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.21 |
| Host frac | 0.79 |
| log L5100,Host | 43.20 |
| Fe II/Hβ | 4.70 |
| Fe II/[O III] | 0.64 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 1 |
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.