6dFGS gJ155625.3-202829
Observation
| Spectrum ID | 167632502_sp2 |
|---|---|
| Alt name | g1556253-202829 |
| z | 0.0613 |
| RA, Dec | 239.1054, -20.4746 |
| MJD | 59725.59 |
| SNR/Å B/R | 10.6/22.1 |
| Obs Airmass | 1.02 |
| SMSS ID | 167632502 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.6 ± 0.1 |
| 2MASS Kext | 12.7 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.214 |
| Power law αν | -0.33 ± 0.40 |
| log L5100,AGN | 42.67 ± 0.08 |
| log HβBr/[O III] | 0.64 ± 0.10 |
| log ML5100/M☉ | 7.21 ± 0.54 |
| log MHα/M☉ | 7.17 ± 0.04 |
| log MHβ/M☉ | 7.41 ± 0.54 |
| log M[O III]/M☉ | 7.24 ± 0.54 |
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 | 39.58 ± 0.44 | 301 ± 63 | 128 ± 25 | 3.22 ± 2.66 |
| He II Narrow | 39.43 ± 0.45 | 301 ± 63 | 128 ± 25 | 2.55 ± 2.54 |
| He II Broad | 41.18 ± 0.08 | 10038 ± 64 | 4263 ± 26 | 141.16 ± 15.55 |
| Hβ Narrow | 39.80 ± 0.38 | 342 ± 68 | 438 ± 64 | 6.25 ± 5.56 |
| Hβ Broad | 41.34 ± 0.06 | 2739 ± 1768 | 3626 ± 98 | 220.17 ± 17.21 |
| [O III] 5007 | 40.70 ± 0.08 | 342 ± 68 | 439 ± 64 | 52.86 ± 6.07 |
| He I Narrow | 39.78 ± 0.22 | 301 ± 63 | 128 ± 25 | 8.25 ± 1.97 |
| He I Broad | 39.98 ± 0.27 | 1369 ± 63 | 581 ± 25 | 13.10 ± 4.14 |
| [O I] 6300 | — | — | — | — |
| Hα Narrow | 40.50 ± 0.05 | 301 ± 63 | 128 ± 25 | 51.90 ± 2.81 |
| Hα Broad | 41.50 ± 0.02 | 3066 ± 129 | 1382 ± 71 | 517.26 ± 11.25 |
| [N II] 6585 | 40.38 ± 0.05 | 301 ± 63 | 128 ± 25 | 40.14 ± 2.56 |
| [S II] 6718 | 40.05 ± 0.09 | 301 ± 63 | 128 ± 25 | 19.31 ± 2.47 |
| [S II] 6732 | 40.06 ± 0.09 | 301 ± 63 | 128 ± 25 | 19.77 ± 2.59 |
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 | 3.30 |
|---|---|
| Hβ Broad SNR | 1.75 |
| Hγ Broad SNR | 0.44 |
| AGN frac | 0.08 |
| Host frac | 0.92 |
| log L5100,Host | 43.75 |
| Fe II/Hβ | 0.61 |
| Fe II/[O III] | 2.64 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 2 |
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.