NAME MR 2251-178
Observation
| Spectrum ID | 6111939_sp1 |
|---|---|
| Alt name | MR 2251-178 |
| z | 0.0638 |
| RA, Dec | 343.5245, -17.5820 |
| MJD | 60176.61 |
| SNR/Å B/R | 7.4/12.9 |
| Obs Airmass | 1.04 |
| SMSS ID | 6111939 |
| Closest SMSS | 6.54'', 2010543874 |
| SMSS Mean r6"ap | 14.2 ± 0.1 |
| 2MASS Kext | 11.1 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.034 |
| Power law αν | -0.13 ± 0.13 |
| log L5100,AGN | 43.41 ± 0.02 |
| log HβBr/[O III] | -0.03 ± 0.01 |
| log ML5100/M☉ | 7.97 ± 0.11 |
| log MHα/M☉ | 7.89 ± 0.03 |
| log MHβ/M☉ | 8.13 ± 0.10 |
| log M[O III]/M☉ | 8.32 ± 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 | 40.39 ± 0.16 | 474 ± 63 | 415 ± 25 | 3.60 ± 0.81 |
| Hγ Broad | 41.52 ± 0.03 | 3320 ± 142 | 1189 ± 41 | 48.16 ± 1.30 |
| [O III] 4364 | 40.43 ± 0.09 | 414 ± 63 | 176 ± 25 | 3.99 ± 0.44 |
| He II Narrow | 40.08 ± 0.16 | 414 ± 63 | 176 ± 25 | 2.04 ± 0.44 |
| He II Broad | 40.98 ± 0.08 | 5183 ± 206 | 2201 ± 87 | 15.66 ± 1.64 |
| Hβ Narrow | 41.05 ± 0.04 | 474 ± 63 | 415 ± 25 | 20.22 ± 0.90 |
| Hβ Broad | 41.97 ± 0.01 | 4560 ± 540 | 2725 ± 60 | 167.69 ± 2.28 |
| [O III] 5007 | 42.00 ± 0.01 | 474 ± 63 | 415 ± 25 | 189.15 ± 1.02 |
| He I Narrow | 39.86 ± 0.15 | 414 ± 63 | 176 ± 25 | 1.85 ± 0.36 |
| He I Broad | 40.77 ± 0.06 | 3561 ± 180 | 1512 ± 76 | 15.34 ± 1.09 |
| [O I] 6300 | 40.55 ± 0.03 | 414 ± 63 | 176 ± 25 | 10.34 ± 0.41 |
| Hα Narrow | 41.23 ± 0.02 | 414 ± 63 | 176 ± 25 | 53.56 ± 0.78 |
| Hα Broad | 42.65 ± 0.01 | 3120 ± 70 | 1818 ± 25 | 1424.56 ± 2.17 |
| [N II] 6585 | 40.41 ± 0.06 | 414 ± 63 | 176 ± 25 | 8.16 ± 0.66 |
| [S II] 6718 | 40.52 ± 0.03 | 414 ± 63 | 176 ± 25 | 10.93 ± 0.49 |
| [S II] 6732 | 40.50 ± 0.03 | 414 ± 63 | 176 ± 25 | 10.53 ± 0.50 |
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 | 47.00 |
|---|---|
| Hβ Broad SNR | 9.08 |
| Hγ Broad SNR | 6.30 |
| AGN frac | 0.83 |
| Host frac | 0.17 |
| log L5100,Host | 42.71 |
| Fe II/Hβ | 0.29 |
| Fe II/[O III] | 0.27 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 1 |
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.