NGC 863
Observation
| Spectrum ID | 15292183_sp1 |
|---|---|
| Alt name | g0214336-004600 |
| z | 0.0265 |
| RA, Dec | 33.6399, -0.7667 |
| MJD | 60563.6 |
| SNR/Å B/R | 31.9/58.5 |
| Obs Airmass | 1.49 |
| SMSS ID | 15292183 |
| Closest SMSS | 6.02'', 2027524088 |
| SMSS Mean r6"ap | 14.5 ± 0.1 |
| 2MASS Kext | 9.5 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.031 |
| Power law αν | 0.48 ± 0.01 |
| log L5100,AGN | 43.14 ± 0.01 |
| log HβBr/[O III] | 0.67 ± 0.01 |
| log ML5100/M☉ | 7.88 ± 0.04 |
| log MHα/M☉ | 7.32 ± 0.02 |
| log MHβ/M☉ | 7.94 ± 0.04 |
| log M[O III]/M☉ | 7.76 ± 0.05 |
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 | 38.99 ± 0.41 | 444 ± 63 | 207 ± 26 | 0.25 ± 0.20 |
| Hγ Broad | 40.63 ± 0.04 | 2988 ± 140 | 1001 ± 38 | 10.50 ± 0.50 |
| [O III] 4364 | 39.32 ± 0.23 | 363 ± 63 | 154 ± 25 | 0.52 ± 0.17 |
| He II Narrow | 39.23 ± 0.23 | 363 ± 63 | 154 ± 25 | 0.50 ± 0.17 |
| He II Broad | 40.41 ± 0.07 | 5559 ± 120 | 2361 ± 50 | 7.49 ± 0.67 |
| Hβ Narrow | 39.75 ± 0.09 | 444 ± 63 | 207 ± 26 | 1.88 ± 0.21 |
| Hβ Broad | 41.47 ± 0.01 | 4717 ± 194 | 3824 ± 64 | 95.93 ± 1.14 |
| [O III] 5007 | 40.80 ± 0.01 | 444 ± 63 | 207 ± 26 | 22.18 ± 0.26 |
| He I Narrow | 39.19 ± 0.16 | 363 ± 63 | 154 ± 25 | 0.81 ± 0.18 |
| He I Broad | 40.63 ± 0.03 | 5973 ± 120 | 2536 ± 50 | 22.41 ± 0.92 |
| [O I] 6300 | 39.83 ± 0.04 | 363 ± 63 | 154 ± 25 | 4.21 ± 0.23 |
| Hα Narrow | 40.17 ± 0.03 | 363 ± 63 | 154 ± 25 | 10.08 ± 0.32 |
| Hα Broad | 41.83 ± 0.01 | 2856 ± 75 | 1725 ± 25 | 470.49 ± 1.12 |
| [N II] 6585 | 40.61 ± 0.01 | 363 ± 63 | 154 ± 25 | 27.81 ± 0.33 |
| [S II] 6718 | 40.10 ± 0.02 | 363 ± 63 | 154 ± 25 | 9.12 ± 0.30 |
| [S II] 6732 | 40.03 ± 0.03 | 363 ± 63 | 154 ± 25 | 7.79 ± 0.29 |
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 | 31.63 |
|---|---|
| Hβ Broad SNR | 9.35 |
| Hγ Broad SNR | 3.81 |
| AGN frac | 0.39 |
| Host frac | 0.61 |
| log L5100,Host | 43.33 |
| Fe II/Hβ | 0.29 |
| Fe II/[O III] | 1.37 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 2 |
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.