SDSS J024545.49-030449.6
Observation
| Spectrum ID | 15638721_sp2 |
|---|---|
| Alt name | g0245455-030450 |
| z | 0.0745 |
| RA, Dec | 41.4396, -3.0805 |
| MJD | 60203.68 |
| SNR/Å B/R | 17.2/23.7 |
| Obs Airmass | 1.16 |
| SMSS ID | 15638721 |
| Closest SMSS | 12.33'', 15638445 |
| SMSS Mean r6"ap | 16.8 ± 0.1 |
| 2MASS Kext | 13.6 ± 0.2 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.028 |
| Power law αν | 0.13 ± 0.11 |
| log L5100,AGN | 43.60 ± 0.02 |
| log HβBr/[O III] | 0.06 ± 0.01 |
| log ML5100/M☉ | 8.09 ± 0.02 |
| log MHα/M☉ | 7.87 ± 0.02 |
| log MHβ/M☉ | 8.13 ± 0.03 |
| log M[O III]/M☉ | 8.27 ± 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 | 40.40 ± 0.07 | 322 ± 62 | 203 ± 26 | 2.30 ± 0.27 |
| Hγ Broad | 41.31 ± 0.03 | 4220 ± 258 | 1615 ± 55 | 18.50 ± 0.65 |
| [O III] 4364 | 40.19 ± 0.09 | 302 ± 63 | 128 ± 25 | 1.43 ± 0.17 |
| He II Narrow | 40.29 ± 0.06 | 302 ± 63 | 128 ± 25 | 2.08 ± 0.17 |
| He II Broad | 41.14 ± 0.04 | 5825 ± 193 | 2474 ± 81 | 15.01 ± 0.79 |
| Hβ Narrow | 40.90 ± 0.02 | 322 ± 62 | 204 ± 26 | 9.33 ± 0.33 |
| Hβ Broad | 41.87 ± 0.01 | 4796 ± 115 | 2278 ± 75 | 86.67 ± 1.22 |
| [O III] 5007 | 41.81 ± 0.01 | 322 ± 62 | 204 ± 26 | 79.30 ± 0.39 |
| He I Narrow | 39.71 ± 0.15 | 302 ± 63 | 128 ± 25 | 0.89 ± 0.25 |
| He I Broad | 41.22 ± 0.02 | 5096 ± 195 | 2164 ± 82 | 28.90 ± 0.83 |
| [O I] 6300 | 40.43 ± 0.02 | 302 ± 63 | 128 ± 25 | 5.53 ± 0.21 |
| Hα Narrow | 41.44 ± 0.01 | 302 ± 63 | 128 ± 25 | 60.47 ± 0.36 |
| Hα Broad | 42.29 ± 0.01 | 3924 ± 66 | 1654 ± 41 | 428.14 ± 1.57 |
| [N II] 6585 | 40.95 ± 0.01 | 302 ± 63 | 128 ± 25 | 19.77 ± 0.36 |
| [S II] 6718 | 40.66 ± 0.02 | 302 ± 63 | 128 ± 25 | 10.74 ± 0.26 |
| [S II] 6732 | 40.65 ± 0.02 | 302 ± 63 | 128 ± 25 | 10.49 ± 0.33 |
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 | 25.56 |
|---|---|
| Hβ Broad SNR | 10.06 |
| Hγ Broad SNR | 4.11 |
| AGN frac | 0.72 |
| Host frac | 0.28 |
| log L5100,Host | 43.19 |
| Fe II/Hβ | 0.29 |
| Fe II/[O III] | 0.33 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
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.