NGC 985
Observation
| Spectrum ID | 15351439_sp1 |
|---|---|
| Alt name | g0234378-084716 |
| z | 0.0426 |
| RA, Dec | 38.6576, -8.7878 |
| MJD | 60179.77 |
| SNR/Å B/R | 12.8/19.8 |
| Obs Airmass | 1.08 |
| SMSS ID | 15351439 |
| Closest SMSS | 3.90'', 15351438 |
| SMSS Mean r6"ap | 14.3 ± 0.0 |
| 2MASS Kext | 10.5 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.028 |
| Power law αν | 0.34 ± 0.11 |
| log L5100,AGN | 43.65 ± 0.02 |
| log HβBr/[O III] | -0.10 ± 0.04 |
| log ML5100/M☉ | 8.01 ± 0.11 |
| log MHα/M☉ | 8.03 ± 0.03 |
| log MHβ/M☉ | 8.04 ± 0.11 |
| log M[O III]/M☉ | 8.26 ± 0.11 |
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 | 40.38 ± 0.19 | 401 ± 63 | 257 ± 34 | 1.88 ± 0.36 |
| Hγ Broad | 41.08 ± 0.09 | 1384 ± 171 | 484 ± 62 | 8.42 ± 0.43 |
| [O III] 4364 | 40.51 ± 0.08 | 375 ± 63 | 158 ± 25 | 2.58 ± 0.23 |
| He II Narrow | 40.13 ± 0.18 | 375 ± 63 | 158 ± 25 | 1.27 ± 0.23 |
| He II Broad | 40.56 ± 0.25 | 1352 ± 259 | 574 ± 110 | 2.98 ± 0.43 |
| Hβ Narrow | 40.89 ± 0.05 | 401 ± 63 | 257 ± 34 | 8.05 ± 0.43 |
| Hβ Broad | 41.90 ± 0.04 | 4257 ± 506 | 1603 ± 196 | 80.38 ± 0.90 |
| [O III] 5007 | 42.00 ± 0.01 | 401 ± 63 | 257 ± 34 | 109.72 ± 0.52 |
| He I Narrow | 39.65 ± 0.29 | 375 ± 63 | 158 ± 25 | 0.71 ± 0.22 |
| He I Broad | 40.70 ± 0.08 | 1332 ± 125 | 566 ± 52 | 7.63 ± 0.43 |
| [O I] 6300 | 40.52 ± 0.05 | 375 ± 63 | 158 ± 25 | 6.32 ± 0.28 |
| Hα Narrow | 41.39 ± 0.02 | 375 ± 63 | 158 ± 25 | 51.08 ± 0.57 |
| Hα Broad | 42.56 ± 0.01 | 3880 ± 97 | 1672 ± 31 | 763.04 ± 1.48 |
| [N II] 6585 | 41.24 ± 0.02 | 375 ± 63 | 158 ± 25 | 36.41 ± 0.58 |
| [S II] 6718 | 40.91 ± 0.02 | 375 ± 63 | 158 ± 25 | 17.74 ± 0.35 |
| [S II] 6732 | 40.87 ± 0.02 | 375 ± 63 | 158 ± 25 | 16.28 ± 0.35 |
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 | 36.71 |
|---|---|
| Hβ Broad SNR | 10.59 |
| Hγ Broad SNR | 5.08 |
| AGN frac | 0.80 |
| Host frac | 0.19 |
| log L5100,Host | 43.03 |
| Fe II/Hβ | 0.29 |
| Fe II/[O III] | 0.23 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 0 |
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.