Z 4-40
Observation
| Spectrum ID | 75772478_sp1 |
|---|---|
| Alt name | g0830144-025250 |
| z | 0.0406 |
| RA, Dec | 127.5601, -2.8804 |
| MJD | 60344.6 |
| SNR/Å B/R | 9.9/16.9 |
| Obs Airmass | 1.15 |
| SMSS ID | 75772478 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 15.9 ± 0.0 |
| 2MASS Kext | 11.9 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.8+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.025 |
| Power law αν | -1.99 ± 0.02 |
| log L5100,AGN | 42.62 ± 0.04 |
| log HβBr/[O III] | <-1.42 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 6.62 ± 0.04 |
| log MHβ/M☉ | — |
| log M[O III]/M☉ | — |
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 | 39.53 ± 0.35 | 707 ± 63 | 463 ± 25 | 4.12 ± 1.71 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 38.99 ± 0.41 | 334 ± 62 | 140 ± 25 | 1.18 ± 0.88 |
| He II Narrow | 39.35 ± 0.25 | 334 ± 62 | 140 ± 25 | 2.71 ± 0.79 |
| He II Broad | 40.15 ± 0.12 | 2501 ± 62 | 1062 ± 25 | 17.20 ± 2.24 |
| Hβ Narrow | 40.50 ± 0.04 | 707 ± 63 | 463 ± 25 | 38.77 ± 1.48 |
| Hβ Broad | <40.07 | — | — | — |
| [O III] 5007 | 41.49 ± 0.01 | 707 ± 63 | 463 ± 25 | 377.73 ± 1.75 |
| He I Narrow | 39.53 ± 0.12 | 334 ± 62 | 140 ± 25 | 4.10 ± 0.58 |
| He I Broad | 38.98 ± 0.51 | 1205 ± 62 | 512 ± 25 | 1.15 ± 1.04 |
| [O I] 6300 | 39.80 ± 0.06 | 334 ± 62 | 140 ± 25 | 7.72 ± 0.62 |
| Hα Narrow | 41.04 ± 0.01 | 334 ± 62 | 140 ± 25 | 135.07 ± 0.80 |
| Hα Broad | 41.19 ± 0.01 | 2033 ± 66 | 751 ± 25 | 186.08 ± 1.76 |
| [N II] 6585 | 41.01 ± 0.01 | 334 ± 62 | 140 ± 25 | 124.40 ± 0.80 |
| [S II] 6718 | 40.37 ± 0.02 | 334 ± 62 | 140 ± 25 | 28.70 ± 0.66 |
| [S II] 6732 | 40.34 ± 0.02 | 334 ± 62 | 140 ± 25 | 26.47 ± 0.66 |
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 | 10.57 |
|---|---|
| Hβ Broad SNR | 0.35 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.29 |
| Host frac | 0.71 |
| log L5100,Host | 43.01 |
| Fe II/Hβ | — |
| Fe II/[O III] | 0.04 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 2 |
balmer_snr | 2 |
hb_width | 2 |
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.