NGC 2992
Observation
| Spectrum ID | 88875404_sp1 |
|---|---|
| Alt name | g0945420-141935 |
| z | 0.0079 |
| RA, Dec | 146.4247, -14.3269 |
| MJD | 60263.72 |
| SNR/Å B/R | 15.1/34.3 |
| Obs Airmass | 1.38 |
| SMSS ID | 88875404 |
| Closest SMSS | 1.75'', 2145877596 |
| SMSS Mean r6"ap | 14.3 ± 0.1 |
| 2MASS Kext | 8.6 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.8 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.052 |
| Power law αν | -1.98 ± 0.02 |
| log L5100,AGN | 41.96 ± 0.02 |
| log HβBr/[O III] | -1.38 ± 0.15 |
| log ML5100/M☉ | 6.32 ± 0.07 |
| log MHα/M☉ | 6.34 ± 0.06 |
| log MHβ/M☉ | 5.89 ± 0.12 |
| log M[O III]/M☉ | 6.63 ± 0.06 |
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 | 38.97 ± 0.21 | 372 ± 62 | 231 ± 25 | 5.28 ± 1.19 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 38.63 ± 0.28 | 346 ± 62 | 145 ± 25 | 2.37 ± 0.93 |
| He II Narrow | 38.68 ± 0.26 | 346 ± 62 | 145 ± 25 | 2.70 ± 0.68 |
| He II Broad | 39.15 ± 0.18 | 1292 ± 63 | 549 ± 25 | 7.94 ± 1.37 |
| Hβ Narrow | 39.67 ± 0.04 | 372 ± 62 | 232 ± 25 | 26.41 ± 0.87 |
| Hβ Broad | 39.26 ± 0.15 | 1396 ± 80 | 498 ± 31 | 8.73 ± 1.37 |
| [O III] 5007 | 40.64 ± 0.01 | 372 ± 62 | 232 ± 25 | 246.77 ± 1.09 |
| He I Narrow | — | — | — | — |
| He I Broad | — | — | — | — |
| [O I] 6300 | 39.58 ± 0.02 | 346 ± 62 | 145 ± 25 | 21.53 ± 0.51 |
| Hα Narrow | 40.30 ± 0.01 | 346 ± 62 | 145 ± 25 | 113.52 ± 0.72 |
| Hα Broad | 40.80 ± 0.01 | 1913 ± 65 | 755 ± 25 | 357.52 ± 1.41 |
| [N II] 6585 | 40.32 ± 0.01 | 346 ± 62 | 145 ± 25 | 116.60 ± 0.64 |
| [S II] 6718 | 40.01 ± 0.01 | 346 ± 62 | 145 ± 25 | 57.27 ± 0.54 |
| [S II] 6732 | 39.95 ± 0.01 | 346 ± 62 | 145 ± 25 | 50.59 ± 0.54 |
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 | 23.93 |
|---|---|
| Hβ Broad SNR | 1.31 |
| Hγ Broad SNR | 0.54 |
| AGN frac | 0.22 |
| Host frac | 0.78 |
| log L5100,Host | 42.50 |
| Fe II/Hβ | 2.32 |
| Fe II/[O III] | 0.08 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 0 |
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.