SDSS J024545.49-030449.6
Observation
| Spectrum ID | 15638721_sp1 |
|---|---|
| Alt name | g0245455-030450 |
| z | 0.0745 |
| RA, Dec | 41.4396, -3.0805 |
| MJD | 59501.71 |
| SNR/Å B/R | 9.0/16.6 |
| Obs Airmass | 1.26 |
| 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 | -0.09 ± 0.20 |
| log L5100,AGN | 43.12 ± 0.03 |
| log HβBr/[O III] | -0.02 ± 0.01 |
| log ML5100/M☉ | 7.97 ± 0.04 |
| log MHα/M☉ | 7.69 ± 0.02 |
| log MHβ/M☉ | 8.06 ± 0.04 |
| log M[O III]/M☉ | 8.22 ± 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 | 40.25 ± 0.08 | 322 ± 63 | 306 ± 27 | 5.01 ± 0.80 |
| Hγ Broad | 41.07 ± 0.05 | 5049 ± 403 | 1919 ± 68 | 32.20 ± 1.67 |
| [O III] 4364 | 39.93 ± 0.12 | 307 ± 63 | 130 ± 25 | 2.43 ± 0.39 |
| He II Narrow | 39.83 ± 0.12 | 307 ± 63 | 130 ± 25 | 2.20 ± 0.40 |
| He II Broad | 41.16 ± 0.04 | 11167 ± 193 | 4742 ± 81 | 46.80 ± 2.52 |
| Hβ Narrow | 40.61 ± 0.03 | 322 ± 63 | 306 ± 27 | 14.29 ± 0.89 |
| Hβ Broad | 41.54 ± 0.01 | 5248 ± 170 | 1972 ± 43 | 119.31 ± 1.90 |
| [O III] 5007 | 41.56 ± 0.01 | 322 ± 63 | 306 ± 27 | 133.63 ± 1.05 |
| He I Narrow | — | — | — | — |
| He I Broad | 40.67 ± 0.04 | 3685 ± 120 | 1565 ± 50 | 23.06 ± 1.00 |
| [O I] 6300 | 40.00 ± 0.04 | 307 ± 63 | 130 ± 25 | 5.79 ± 0.30 |
| Hα Narrow | 41.04 ± 0.01 | 307 ± 63 | 130 ± 25 | 67.87 ± 0.42 |
| Hα Broad | 41.88 ± 0.01 | 4267 ± 69 | 1840 ± 68 | 472.03 ± 2.95 |
| [N II] 6585 | 40.61 ± 0.01 | 307 ± 63 | 130 ± 25 | 25.37 ± 0.39 |
| [S II] 6718 | 40.31 ± 0.02 | 307 ± 63 | 130 ± 25 | 13.33 ± 0.38 |
| [S II] 6732 | 40.25 ± 0.02 | 307 ± 63 | 130 ± 25 | 11.59 ± 0.53 |
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 | 13.67 |
|---|---|
| Hβ Broad SNR | 7.44 |
| Hγ Broad SNR | 2.94 |
| AGN frac | 0.68 |
| Host frac | 0.32 |
| log L5100,Host | 42.81 |
| Fe II/Hβ | 0.22 |
| Fe II/[O III] | 0.20 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 1 |
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.