2MASS J05542641-3453402
Observation
| Spectrum ID | 19969626_sp1 |
|---|---|
| Alt name | g0554264-345341 |
| z | 0.0817 |
| RA, Dec | 88.6100, -34.8946 |
| MJD | 60341.46 |
| SNR/Å B/R | 17.0/17.6 |
| Obs Airmass | 1.00 |
| SMSS ID | 19969626 |
| Closest SMSS | 13.04'', 2041780666 |
| SMSS Mean r6"ap | 16.5 ± 0.0 |
| 2MASS Kext | nan ± nan |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.035 |
| Power law αν | 0.14 ± 0.08 |
| log L5100,AGN | 43.81 ± 0.01 |
| log HβBr/[O III] | 0.52 ± 0.01 |
| log ML5100/M☉ | 7.32 ± 0.03 |
| log MHα/M☉ | 7.06 ± 0.04 |
| log MHβ/M☉ | 7.36 ± 0.03 |
| log M[O III]/M☉ | 7.28 ± 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 | 40.26 ± 0.21 | 315 ± 63 | 344 ± 35 | 1.00 ± 0.30 |
| Hγ Broad | 41.63 ± 0.02 | 1709 ± 132 | 717 ± 38 | 23.63 ± 0.45 |
| [O III] 4364 | 39.89 ± 0.24 | 299 ± 63 | 126 ± 25 | 0.44 ± 0.15 |
| He II Narrow | 40.26 ± 0.09 | 299 ± 63 | 126 ± 25 | 1.18 ± 0.18 |
| He II Broad | 41.59 ± 0.03 | 8903 ± 333 | 3781 ± 141 | 25.36 ± 0.92 |
| Hβ Narrow | 41.01 ± 0.04 | 315 ± 63 | 344 ± 35 | 7.23 ± 0.37 |
| Hβ Broad | 42.08 ± 0.01 | 1762 ± 55 | 1002 ± 42 | 85.92 ± 0.74 |
| [O III] 5007 | 41.57 ± 0.01 | 315 ± 63 | 344 ± 35 | 27.82 ± 0.40 |
| He I Narrow | 39.94 ± 0.16 | 299 ± 63 | 126 ± 25 | 0.92 ± 0.22 |
| He I Broad | 41.11 ± 0.04 | 3189 ± 183 | 1354 ± 77 | 13.64 ± 0.69 |
| [O I] 6300 | 40.04 ± 0.10 | 299 ± 63 | 126 ± 25 | 1.36 ± 0.22 |
| Hα Narrow | 41.34 ± 0.02 | 299 ± 63 | 126 ± 25 | 29.55 ± 0.40 |
| Hα Broad | 42.48 ± 0.01 | 1351 ± 63 | 709 ± 25 | 400.28 ± 1.15 |
| [N II] 6585 | 40.98 ± 0.02 | 299 ± 63 | 126 ± 25 | 12.84 ± 0.33 |
| [S II] 6718 | 40.67 ± 0.03 | 299 ± 63 | 126 ± 25 | 6.58 ± 0.42 |
| [S II] 6732 | 40.54 ± 0.05 | 299 ± 63 | 126 ± 25 | 4.88 ± 0.44 |
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 | 64.89 |
|---|---|
| Hβ Broad SNR | 25.98 |
| Hγ Broad SNR | 12.39 |
| AGN frac | 0.84 |
| Host frac | 0.16 |
| log L5100,Host | 43.10 |
| Fe II/Hβ | 0.68 |
| Fe II/[O III] | 2.24 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 1 |
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.