LEDA 305493
Observation
| Spectrum ID | 499431245_sp1 |
|---|---|
| Alt name | g0242400-662047 |
| z | 0.0931 |
| RA, Dec | 40.6668, -66.3465 |
| MJD | 60164.77 |
| SNR/Å B/R | 13.4/21.0 |
| Obs Airmass | 1.25 |
| SMSS ID | 499431245 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.2 ± 0.1 |
| 2MASS Kext | 12.5 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.027 |
| Power law αν | -1.23 ± 0.20 |
| log L5100,AGN | 43.53 ± 0.03 |
| log HβBr/[O III] | <-0.08 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 7.81 ± 0.09 |
| log MHβ/M☉ | — |
| log M[O III]/M☉ | — |
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 | 40.16 ± 0.21 | 362 ± 63 | 158 ± 26 | 1.91 ± 0.64 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.78 ± 0.36 | 360 ± 62 | 152 ± 25 | 0.81 ± 0.51 |
| He II Narrow | 39.73 ± 0.39 | 360 ± 62 | 152 ± 25 | 0.76 ± 0.48 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.91 ± 0.04 | 362 ± 63 | 158 ± 26 | 11.64 ± 0.66 |
| Hβ Broad | <41.26 | — | — | — |
| [O III] 5007 | 41.35 ± 0.02 | 362 ± 63 | 158 ± 26 | 32.78 ± 0.76 |
| He I Narrow | 39.84 ± 0.31 | 360 ± 62 | 152 ± 25 | 1.15 ± 0.41 |
| He I Broad | 40.08 ± 0.32 | 1178 ± 62 | 500 ± 25 | 2.05 ± 0.78 |
| [O I] 6300 | 40.31 ± 0.10 | 360 ± 62 | 152 ± 25 | 3.64 ± 0.53 |
| Hα Narrow | 41.65 ± 0.01 | 360 ± 62 | 152 ± 25 | 82.55 ± 0.57 |
| Hα Broad | 41.68 ± 0.03 | 5655 ± 582 | 2595 ± 42 | 87.59 ± 2.50 |
| [N II] 6585 | 41.39 ± 0.01 | 360 ± 62 | 152 ± 25 | 45.37 ± 0.55 |
| [S II] 6718 | 41.00 ± 0.03 | 360 ± 62 | 152 ± 25 | 18.54 ± 0.65 |
| [S II] 6732 | 40.84 ± 0.03 | 360 ± 62 | 152 ± 25 | 13.10 ± 0.67 |
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 | 2.24 |
|---|---|
| Hβ Broad SNR | 0.00 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.36 |
| Host frac | 0.64 |
| log L5100,Host | 43.78 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 2 |
balmer_snr | 2 |
hb_width | 2 |
balmer_width | 2 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.