NVSS J205558-152931
Observation
| Spectrum ID | 298390513_sp1 |
|---|---|
| Alt name | g2055580-152929 |
| z | 0.0799 |
| RA, Dec | 313.9914, -15.4915 |
| MJD | 59079.5 |
| SNR/Å B/R | 18.6/32.7 |
| Obs Airmass | 1.08 |
| SMSS ID | 298390513 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.3 ± 0.0 |
| 2MASS Kext | 12.7 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.051 |
| Power law αν | -1.11 ± 0.13 |
| log L5100,AGN | 43.51 ± 0.02 |
| log HβBr/[O III] | -0.36 ± 0.03 |
| log ML5100/M☉ | 8.55 ± 0.03 |
| log MHα/M☉ | 7.81 ± 0.03 |
| log MHβ/M☉ | 8.42 ± 0.04 |
| log M[O III]/M☉ | 8.75 ± 0.02 |
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 | 40.27 ± 0.12 | 375 ± 63 | 376 ± 26 | 2.55 ± 0.54 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 40.02 ± 0.17 | 348 ± 62 | 147 ± 25 | 1.42 ± 0.32 |
| He II Narrow | 39.67 ± 0.32 | 348 ± 62 | 147 ± 25 | 0.68 ± 0.27 |
| He II Broad | 40.12 ± 0.24 | 1178 ± 62 | 500 ± 25 | 1.90 ± 0.49 |
| Hβ Narrow | 40.92 ± 0.02 | 375 ± 63 | 376 ± 26 | 12.54 ± 0.53 |
| Hβ Broad | 41.40 ± 0.03 | 8511 ± 213 | 3203 ± 30 | 38.05 ± 1.49 |
| [O III] 5007 | 41.76 ± 0.01 | 375 ± 63 | 376 ± 26 | 88.81 ± 0.61 |
| He I Narrow | 39.83 ± 0.13 | 348 ± 62 | 147 ± 25 | 1.20 ± 0.19 |
| He I Broad | 40.78 ± 0.07 | 7529 ± 79 | 3197 ± 32 | 10.73 ± 0.94 |
| [O I] 6300 | 40.47 ± 0.03 | 348 ± 62 | 147 ± 25 | 5.54 ± 0.22 |
| Hα Narrow | 41.40 ± 0.01 | 348 ± 62 | 147 ± 25 | 49.06 ± 0.27 |
| Hα Broad | 42.11 ± 0.01 | 4152 ± 149 | 2061 ± 25 | 249.55 ± 1.11 |
| [N II] 6585 | 41.36 ± 0.01 | 348 ± 62 | 147 ± 25 | 44.99 ± 0.26 |
| [S II] 6718 | 40.84 ± 0.01 | 348 ± 62 | 147 ± 25 | 13.74 ± 0.29 |
| [S II] 6732 | 40.77 ± 0.02 | 348 ± 62 | 147 ± 25 | 11.79 ± 0.31 |
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 | 14.68 |
|---|---|
| Hβ Broad SNR | 2.22 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.47 |
| Host frac | 0.53 |
| log L5100,Host | 43.57 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 0 |
balmer_width | 1 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.