NGC 427
Observation
| Spectrum ID | 10032748_sp1 |
|---|---|
| Alt name | g0112192-320340 |
| z | 0.0341 |
| RA, Dec | 18.0803, -32.0611 |
| MJD | 60254.49 |
| SNR/Å B/R | 9.5/20.5 |
| Obs Airmass | 1.01 |
| SMSS ID | 10032748 |
| Closest SMSS | 11.69'', 2017162329 |
| SMSS Mean r6"ap | 15.5 ± 0.0 |
| 2MASS Kext | 11.2 ± 0.1 |
AGN Properties
| Spectrum Type | Bad |
|---|---|
| Quality Flag | bad_blue |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.024 |
| Power law αν | -1.92 ± 0.07 |
| log L5100,AGN | 40.80 ± 0.64 |
| log HβBr/[O III] | — |
| log ML5100/M☉ | — |
| log MHα/M☉ | — |
| 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 | — | — | — | — |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.19 ± 0.24 | 386 ± 62 | 163 ± 25 | 126.53 ± 65.25 |
| He II Narrow | — | — | — | — |
| He II Broad | — | — | — | — |
| Hβ Narrow | — | — | — | — |
| Hβ Broad | — | — | — | — |
| [O III] 5007 | 39.95 ± 0.05 | 394 ± 63 | 199 ± 40 | 734.49 ± 78.99 |
| He I Narrow | — | — | — | — |
| He I Broad | — | — | — | — |
| [O I] 6300 | — | — | — | — |
| Hα Narrow | 39.86 ± 0.03 | 386 ± 62 | 163 ± 25 | 609.66 ± 27.99 |
| Hα Broad | — | — | — | — |
| [N II] 6585 | 39.95 ± 0.03 | 386 ± 62 | 163 ± 25 | 756.87 ± 27.98 |
| [S II] 6718 | 39.64 ± 0.06 | 386 ± 62 | 163 ± 25 | 368.57 ± 30.30 |
| [S II] 6732 | 39.35 ± 0.10 | 386 ± 62 | 163 ± 25 | 186.74 ± 29.39 |
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 | 0.95 |
|---|---|
| Hβ Broad SNR | 0.00 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.01 |
| Host frac | 0.99 |
| log L5100,Host | 43.03 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
l5100 | 2 |
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.