NGC 617
Observation
| Spectrum ID | 13733498_sp1 |
|---|---|
| Alt name | g0134025-094627 |
| z | 0.0407 |
| RA, Dec | 23.5106, -9.7742 |
| MJD | 60904.76 |
| SNR/Å B/R | 16.0/28.0 |
| Obs Airmass | 1.08 |
| SMSS ID | 13733498 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 15.7 ± 0.0 |
| 2MASS Kext | 11.9 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.028 |
| Power law αν | -1.13 ± 0.05 |
| log L5100,AGN | 43.09 ± 0.01 |
| log HβBr/[O III] | <0.08 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 7.12 ± 0.06 |
| 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 | — | — | — | — |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | — | — | — | — |
| He II Narrow | — | — | — | — |
| He II Broad | 40.55 ± 0.08 | 3820 ± 62 | 1622 ± 25 | 13.57 ± 1.35 |
| Hβ Narrow | 39.70 ± 0.21 | — | 299 ± 25 | 2.02 ± 0.43 |
| Hβ Broad | <40.40 | — | — | — |
| [O III] 5007 | 40.32 ± 0.04 | — | 299 ± 25 | 8.61 ± 0.44 |
| He I Narrow | — | — | — | — |
| He I Broad | 39.13 ± 0.46 | 1269 ± 62 | 539 ± 25 | 0.63 ± 0.52 |
| [O I] 6300 | 39.52 ± 0.11 | 278 ± 62 | 117 ± 25 | 1.65 ± 0.28 |
| Hα Narrow | 40.55 ± 0.01 | 278 ± 62 | 117 ± 25 | 18.23 ± 0.33 |
| Hα Broad | 40.87 ± 0.03 | 4468 ± 131 | 1663 ± 25 | 38.22 ± 1.19 |
| [N II] 6585 | 40.39 ± 0.02 | 278 ± 62 | 117 ± 25 | 12.67 ± 0.32 |
| [S II] 6718 | 40.10 ± 0.03 | 278 ± 62 | 117 ± 25 | 6.63 ± 0.29 |
| [S II] 6732 | 40.01 ± 0.04 | 278 ± 62 | 117 ± 25 | 5.41 ± 0.28 |
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 | 1.69 |
|---|---|
| Hβ Broad SNR | 0.30 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.39 |
| Host frac | 0.61 |
| log L5100,Host | 43.28 |
| Fe II/Hβ | — |
| Fe II/[O III] | 2.24 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
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.