LEDA 835095
Observation
| Spectrum ID | 172750140_sp1 |
|---|---|
| Alt name | g1638309-205525 |
| z | 0.0270 |
| RA, Dec | 249.6288, -20.9235 |
| MJD | 60160.41 |
| SNR/Å B/R | 11.8/15.3 |
| Obs Airmass | 1.02 |
| SMSS ID | 172750140 |
| Closest SMSS | 2.67'', 2259513749 |
| SMSS Mean r6"ap | 15.4 ± 0.0 |
| 2MASS Kext | 11.0 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.429 |
| Power law αν | -0.88 ± 0.04 |
| log L5100,AGN | 43.60 ± 0.01 |
| log HβBr/[O III] | 0.16 ± 0.05 |
| log ML5100/M☉ | 7.39 ± 0.10 |
| log MHα/M☉ | 6.92 ± 0.04 |
| log MHβ/M☉ | 7.38 ± 0.11 |
| log M[O III]/M☉ | 7.46 ± 0.10 |
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 | 40.65 ± 0.12 | 446 ± 63 | 311 ± 29 | 4.73 ± 0.39 |
| Hγ Broad | 41.42 ± 0.03 | 2523 ± 463 | 1099 ± 190 | 27.80 ± 0.77 |
| [O III] 4364 | 39.75 ± 0.33 | 357 ± 66 | 150 ± 27 | 0.60 ± 0.24 |
| He II Narrow | 39.85 ± 0.21 | 357 ± 66 | 150 ± 27 | 0.83 ± 0.23 |
| He II Broad | 41.25 ± 0.08 | 3481 ± 602 | 1478 ± 255 | 20.57 ± 0.71 |
| Hβ Narrow | 40.98 ± 0.07 | 446 ± 63 | 311 ± 29 | 11.55 ± 0.38 |
| Hβ Broad | 41.75 ± 0.05 | 2132 ± 263 | 978 ± 197 | 68.18 ± 0.80 |
| [O III] 5007 | 41.59 ± 0.01 | 446 ± 63 | 311 ± 29 | 48.09 ± 0.39 |
| He I Narrow | 39.81 ± 0.20 | 357 ± 66 | 150 ± 27 | 0.96 ± 0.17 |
| He I Broad | 40.78 ± 0.09 | 1982 ± 566 | 841 ± 240 | 9.08 ± 0.43 |
| [O I] 6300 | 39.79 ± 0.15 | 357 ± 66 | 150 ± 27 | 1.01 ± 0.21 |
| Hα Narrow | 40.93 ± 0.05 | 357 ± 66 | 150 ± 27 | 14.22 ± 0.38 |
| Hα Broad | 42.19 ± 0.01 | 1408 ± 67 | 703 ± 32 | 265.50 ± 0.76 |
| [N II] 6585 | 40.92 ± 0.04 | 357 ± 66 | 150 ± 27 | 13.92 ± 0.32 |
| [S II] 6718 | 40.38 ± 0.04 | 357 ± 66 | 150 ± 27 | 4.19 ± 0.23 |
| [S II] 6732 | 40.35 ± 0.04 | 357 ± 66 | 150 ± 27 | 3.94 ± 0.23 |
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 | 48.54 |
|---|---|
| Hβ Broad SNR | 16.11 |
| Hγ Broad SNR | 7.53 |
| AGN frac | 0.99 |
| Host frac | 0.01 |
| log L5100,Host | 41.61 |
| Fe II/Hβ | 0.74 |
| Fe II/[O III] | 1.09 |
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.