M 77
Observation
| Spectrum ID | 15617931_sp1 |
|---|---|
| Alt name | NGC 1068 |
| z | 0.0036 |
| RA, Dec | 40.6696, -0.0133 |
| MJD | 60915.78 |
| SNR/Å B/R | 8.8/13.0 |
| Obs Airmass | 1.18 |
| SMSS ID | 15617931 |
| Closest SMSS | 5.76'', 2027963543 |
| SMSS Mean r6"ap | 11.6 ± 0.2 |
| 2MASS Kext | 5.8 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 2 |
|---|---|
| Quality Flag | good |
| AGN reference | S+1994 |
| MW E(B−V) | 0.029 |
| Power law αν | -0.75 ± 0.45 |
| log L5100,AGN | 42.34 ± 0.09 |
| 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 | 39.84 ± 0.25 | 1335 ± 63 | 558 ± 26 | 13.20 ± 1.58 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.69 ± 0.13 | 1189 ± 73 | 505 ± 30 | 9.34 ± 1.53 |
| He II Narrow | 39.76 ± 0.19 | 1189 ± 73 | 505 ± 30 | 12.04 ± 1.42 |
| He II Broad | 39.99 ± 0.15 | 2486 ± 98 | 1056 ± 41 | 20.20 ± 2.00 |
| Hβ Narrow | 40.14 ± 0.23 | 1335 ± 63 | 558 ± 26 | 30.29 ± 1.67 |
| Hβ Broad | — | — | — | — |
| [O III] 5007 | 41.61 ± 0.01 | 1335 ± 63 | 559 ± 26 | 946.54 ± 2.23 |
| He I Narrow | 39.10 ± 0.37 | 1189 ± 73 | 505 ± 30 | 3.54 ± 1.60 |
| He I Broad | 39.11 ± 0.38 | 1353 ± 113 | 574 ± 47 | 3.49 ± 1.67 |
| [O I] 6300 | 40.23 ± 0.02 | 1189 ± 73 | 505 ± 30 | 51.58 ± 1.55 |
| Hα Narrow | 41.04 ± 0.07 | 1189 ± 73 | 505 ± 30 | 306.07 ± 3.25 |
| Hα Broad | — | — | — | — |
| [N II] 6585 | 41.40 ± 0.05 | 1189 ± 73 | 505 ± 30 | 714.90 ± 3.25 |
| [S II] 6718 | 40.28 ± 0.04 | 1189 ± 73 | 505 ± 30 | 63.57 ± 1.86 |
| [S II] 6732 | 40.51 ± 0.03 | 1189 ± 73 | 505 ± 30 | 107.36 ± 1.88 |
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 | 0.00 |
|---|---|
| Hβ Broad SNR | 0.00 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.33 |
| Host frac | 0.67 |
| log L5100,Host | 42.65 |
| Fe II/Hβ | — |
| Fe II/[O III] | 0.03 |
Quality flags
spurious_hab/hbb | 1.0/0 |
|---|---|
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.