6dFGS gJ190300.3-492201
Observation
| Spectrum ID | 476880179_sp1 |
|---|---|
| Alt name | g1903003-492201 |
| z | 0.0503 |
| RA, Dec | 285.7512, -49.3669 |
| MJD | 60080.73 |
| SNR/Å B/R | 15.1/21.3 |
| Obs Airmass | 1.05 |
| SMSS ID | 476880179 |
| Closest SMSS | 10.86'', 476880177 |
| SMSS Mean r6"ap | 16.0 ± 0.1 |
| 2MASS Kext | nan ± nan |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.047 |
| Power law αν | -0.63 ± 0.11 |
| log L5100,AGN | 43.47 ± 0.02 |
| log HβBr/[O III] | -0.38 ± 0.02 |
| log ML5100/M☉ | 7.82 ± 0.03 |
| log MHα/M☉ | 7.25 ± 0.02 |
| log MHβ/M☉ | 7.67 ± 0.05 |
| log M[O III]/M☉ | 7.99 ± 0.03 |
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 | 40.71 ± 0.02 | 235 ± 62 | 172 ± 26 | 7.08 ± 0.32 |
| Hγ Broad | 40.88 ± 0.06 | 3834 ± 322 | 1503 ± 55 | 10.20 ± 0.75 |
| [O III] 4364 | 40.13 ± 0.07 | 227 ± 62 | 93 ± 25 | 1.87 ± 0.17 |
| He II Narrow | 40.08 ± 0.07 | 227 ± 62 | 93 ± 25 | 1.85 ± 0.17 |
| He II Broad | 40.83 ± 0.06 | 5113 ± 195 | 2171 ± 82 | 10.57 ± 0.80 |
| Hβ Narrow | 41.08 ± 0.01 | 235 ± 62 | 172 ± 26 | 19.36 ± 0.33 |
| Hβ Broad | 41.31 ± 0.02 | 3744 ± 136 | 1400 ± 43 | 31.88 ± 0.74 |
| [O III] 5007 | 41.68 ± 0.01 | 235 ± 62 | 172 ± 26 | 80.66 ± 0.37 |
| He I Narrow | 39.90 ± 0.08 | 227 ± 62 | 93 ± 25 | 1.67 ± 0.16 |
| He I Broad | 40.69 ± 0.04 | 2841 ± 143 | 1206 ± 60 | 10.53 ± 0.59 |
| [O I] 6300 | 40.35 ± 0.02 | 227 ± 62 | 93 ± 25 | 5.08 ± 0.23 |
| Hα Narrow | 41.56 ± 0.01 | 227 ± 62 | 93 ± 25 | 87.45 ± 0.32 |
| Hα Broad | 41.89 ± 0.01 | 2553 ± 67 | 1160 ± 41 | 189.82 ± 1.27 |
| [N II] 6585 | 41.02 ± 0.01 | 227 ± 62 | 93 ± 25 | 25.63 ± 0.26 |
| [S II] 6718 | 40.84 ± 0.01 | 227 ± 62 | 93 ± 25 | 17.16 ± 0.21 |
| [S II] 6732 | 40.73 ± 0.01 | 227 ± 62 | 93 ± 25 | 13.59 ± 0.20 |
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 | 18.74 |
|---|---|
| Hβ Broad SNR | 5.03 |
| Hγ Broad SNR | 2.08 |
| AGN frac | 0.71 |
| Host frac | 0.29 |
| log L5100,Host | 43.09 |
| Fe II/Hβ | 0.26 |
| Fe II/[O III] | 0.11 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
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.