2MASS J03075714-2242225
Observation
| Spectrum ID | 17743338_sp1 |
|---|---|
| Alt name | g0307572-224223 |
| z | 0.0666 |
| RA, Dec | 46.9881, -22.7062 |
| MJD | 60223.64 |
| SNR/Å B/R | 21.2/29.9 |
| Obs Airmass | 1.03 |
| SMSS ID | 17743338 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.3 ± 0.1 |
| 2MASS Kext | 13.2 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.016 |
| Power law αν | 0.38 ± 0.09 |
| log L5100,AGN | 43.49 ± 0.01 |
| log HβBr/[O III] | 0.35 ± 0.14 |
| log ML5100/M☉ | 8.08 ± 0.02 |
| log MHα/M☉ | 7.79 ± 0.02 |
| log MHβ/M☉ | 8.06 ± 0.07 |
| log M[O III]/M☉ | 8.05 ± 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 | 39.41 ± 0.36 | 360 ± 63 | 168 ± 25 | 0.29 ± 0.18 |
| Hγ Broad | 41.17 ± 0.03 | 4414 ± 208 | 1624 ± 49 | 16.71 ± 0.62 |
| [O III] 4364 | 39.98 ± 0.10 | 290 ± 63 | 122 ± 25 | 1.08 ± 0.16 |
| He II Narrow | 39.89 ± 0.13 | 290 ± 63 | 122 ± 25 | 1.03 ± 0.16 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.21 ± 0.07 | 360 ± 63 | 168 ± 25 | 2.37 ± 0.24 |
| Hβ Broad | 41.64 +0.26−0.02 | 4968 ± 78 | 1849 ± 35 | 63.56 ± 0.78 |
| [O III] 5007 | 41.29 ± 0.01 | 360 ± 63 | 168 ± 25 | 30.64 ± 0.27 |
| He I Narrow | 39.35 ± 0.23 | 290 ± 63 | 122 ± 25 | 0.51 ± 0.18 |
| He I Broad | 40.98 ± 0.03 | 5962 ± 111 | 2532 ± 46 | 21.81 ± 0.88 |
| [O I] 6300 | 38.96 ± 0.38 | 290 ± 63 | 122 ± 25 | 0.25 ± 0.19 |
| Hα Narrow | 40.71 ± 0.02 | 290 ± 63 | 122 ± 25 | 15.28 ± 0.32 |
| Hα Broad | 42.19 ± 0.01 | 3823 ± 70 | 1608 ± 25 | 461.47 ± 1.22 |
| [N II] 6585 | 40.58 ± 0.02 | 290 ± 63 | 122 ± 25 | 11.41 ± 0.31 |
| [S II] 6718 | 40.23 ± 0.03 | 290 ± 63 | 122 ± 25 | 5.31 ± 0.26 |
| [S II] 6732 | 40.11 ± 0.04 | 290 ± 63 | 122 ± 25 | 4.06 ± 0.27 |
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 | 27.64 |
|---|---|
| Hβ Broad SNR | 8.70 |
| Hγ Broad SNR | 3.76 |
| AGN frac | 0.63 |
| Host frac | 0.37 |
| log L5100,Host | 43.27 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
l5100 | 2 |
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.