2MASS J18564937-5442298
Observation
| Spectrum ID | 478650251_sp1 |
|---|---|
| Alt name | g1856494-544230 |
| z | 0.0563 |
| RA, Dec | 284.2057, -54.7083 |
| MJD | 60080.72 |
| SNR/Å B/R | 12.9/19.5 |
| Obs Airmass | 1.09 |
| SMSS ID | 478650251 |
| Closest SMSS | 6.54'', 1581614978 |
| SMSS Mean r6"ap | 16.0 ± 0.0 |
| 2MASS Kext | 12.6 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.083 |
| Power law αν | -0.58 ± 0.12 |
| log L5100,AGN | 43.54 ± 0.02 |
| log HβBr/[O III] | 0.04 ± 0.18 |
| log ML5100/M☉ | 7.77 ± 0.02 |
| log MHα/M☉ | 7.64 ± 0.03 |
| log MHβ/M☉ | 7.74 ± 0.09 |
| log M[O III]/M☉ | 7.88 ± 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 | 40.11 ± 0.14 | 276 ± 63 | 192 ± 27 | 1.50 ± 0.37 |
| Hγ Broad | 41.36 ± 0.03 | 2940 ± 439 | 1337 ± 53 | 27.22 ± 0.84 |
| [O III] 4364 | 40.20 ± 0.08 | 265 ± 63 | 112 ± 25 | 1.89 ± 0.21 |
| He II Narrow | 39.84 ± 0.19 | 265 ± 63 | 112 ± 25 | 0.91 ± 0.20 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.65 ± 0.03 | 276 ± 63 | 192 ± 27 | 6.22 ± 0.39 |
| Hβ Broad | 41.66 +0.35−0.01 | 3396 ± 65 | 1258 ± 31 | 62.83 ± 0.82 |
| [O III] 5007 | 41.62 ± 0.01 | 276 ± 63 | 192 ± 27 | 59.62 ± 0.43 |
| He I Narrow | 39.53 ± 0.24 | 265 ± 63 | 112 ± 25 | 0.61 ± 0.24 |
| He I Broad | 41.27 ± 0.03 | 7647 ± 122 | 3247 ± 51 | 33.84 ± 1.96 |
| [O I] 6300 | 40.19 ± 0.04 | 265 ± 63 | 112 ± 25 | 3.09 ± 0.22 |
| Hα Narrow | 41.10 ± 0.01 | 265 ± 63 | 112 ± 25 | 26.51 ± 0.42 |
| Hα Broad | 42.51 ± 0.01 | 2589 ± 66 | 1322 ± 25 | 683.13 ± 1.31 |
| [N II] 6585 | 40.34 ± 0.05 | 265 ± 63 | 112 ± 25 | 4.70 ± 0.36 |
| [S II] 6718 | 40.37 ± 0.03 | 265 ± 63 | 112 ± 25 | 5.12 ± 0.25 |
| [S II] 6732 | 40.28 ± 0.04 | 265 ± 63 | 112 ± 25 | 4.13 ± 0.25 |
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 | 51.67 |
|---|---|
| Hβ Broad SNR | 9.06 |
| Hγ Broad SNR | 5.51 |
| AGN frac | 0.77 |
| Host frac | 0.23 |
| log L5100,Host | 43.01 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
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.