LAMOST J124059.02-060753.4
Observation
| Spectrum ID | 106849647_sp1 |
|---|---|
| Alt name | g1240590-060753 |
| z | 0.0498 |
| RA, Dec | 190.2458, -6.1315 |
| MJD | 59016.4 |
| SNR/Å B/R | 22.3/34.2 |
| Obs Airmass | 1.11 |
| SMSS ID | 106849647 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.2 ± 0.0 |
| 2MASS Kext | 12.6 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.8 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.021 |
| Power law αν | 0.12 ± 0.10 |
| log L5100,AGN | 43.22 ± 0.02 |
| log HβBr/[O III] | -0.73 ± 0.08 |
| log ML5100/M☉ | 7.74 ± 0.19 |
| log MHα/M☉ | 6.52 ± 0.05 |
| log MHβ/M☉ | 7.30 ± 0.20 |
| log M[O III]/M☉ | 7.77 ± 0.19 |
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 | 40.06 ± 0.06 | 209 ± 63 | 196 ± 25 | 2.50 ± 0.24 |
| Hγ Broad | 40.25 ± 0.09 | 1204 ± 66 | 713 ± 187 | 3.80 ± 0.47 |
| [O III] 4364 | 38.90 ± 0.40 | 189 ± 62 | 77 ± 25 | 0.18 ± 0.13 |
| He II Narrow | 39.59 ± 0.10 | 189 ± 62 | 77 ± 25 | 0.99 ± 0.13 |
| He II Broad | 40.21 ± 0.10 | 2840 ± 167 | 1206 ± 70 | 4.31 ± 0.55 |
| Hβ Narrow | 40.49 ± 0.02 | 209 ± 63 | 196 ± 25 | 8.55 ± 0.27 |
| Hβ Broad | 40.44 ± 0.08 | 3850 ± 835 | 1672 ± 96 | 7.33 ± 0.74 |
| [O III] 5007 | 41.17 ± 0.01 | 209 ± 63 | 196 ± 25 | 43.63 ± 0.30 |
| He I Narrow | 39.09 ± 0.20 | 189 ± 62 | 77 ± 25 | 0.51 ± 0.14 |
| He I Broad | 40.08 ± 0.09 | 3123 ± 113 | 1326 ± 47 | 4.86 ± 0.56 |
| [O I] 6300 | 39.50 ± 0.07 | 189 ± 62 | 77 ± 25 | 1.51 ± 0.15 |
| Hα Narrow | 40.84 ± 0.01 | 189 ± 62 | 77 ± 25 | 36.07 ± 0.25 |
| Hα Broad | 41.33 ± 0.01 | 1630 ± 71 | 1345 ± 28 | 110.24 ± 1.09 |
| [N II] 6585 | 40.53 ± 0.01 | 189 ± 62 | 77 ± 25 | 17.92 ± 0.22 |
| [S II] 6718 | 40.15 ± 0.02 | 189 ± 62 | 77 ± 25 | 7.78 ± 0.22 |
| [S II] 6732 | 40.07 ± 0.02 | 189 ± 62 | 77 ± 25 | 6.42 ± 0.19 |
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 | 10.98 |
|---|---|
| Hβ Broad SNR | 1.23 |
| Hγ Broad SNR | 2.56 |
| AGN frac | 0.49 |
| Host frac | 0.51 |
| log L5100,Host | 43.24 |
| Fe II/Hβ | 0.85 |
| Fe II/[O III] | 0.15 |
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.