NGC 2617
Observation
| Spectrum ID | 75780515_sp1 |
|---|---|
| Alt name | g0835388-040518 |
| z | 0.0142 |
| RA, Dec | 128.9117, -4.0883 |
| MJD | 60344.59 |
| SNR/Å B/R | 19.0/32.1 |
| Obs Airmass | 1.13 |
| SMSS ID | 75780515 |
| Closest SMSS | 12.49'', 75780514 |
| SMSS Mean r6"ap | 14.5 ± 0.1 |
| 2MASS Kext | 10.1 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.029 |
| Power law αν | -1.97 ± 0.03 |
| log L5100,AGN | 41.94 ± 0.05 |
| log HβBr/[O III] | -0.20 ± 0.02 |
| log ML5100/M☉ | 7.52 ± 0.05 |
| log MHα/M☉ | 6.93 ± 0.05 |
| log MHβ/M☉ | 7.50 ± 0.07 |
| log M[O III]/M☉ | 7.70 ± 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 | 39.25 ± 0.07 | 335 ± 62 | 236 ± 26 | 10.30 ± 1.15 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 38.24 ± 0.39 | 316 ± 62 | 132 ± 25 | 1.02 ± 0.67 |
| He II Narrow | 38.52 ± 0.22 | 316 ± 62 | 132 ± 25 | 1.91 ± 0.55 |
| He II Broad | 39.11 ± 0.23 | 5036 ± 68 | 2139 ± 28 | 7.59 ± 2.16 |
| Hβ Narrow | 39.58 ± 0.03 | 335 ± 62 | 236 ± 26 | 22.11 ± 0.91 |
| Hβ Broad | 40.16 ± 0.02 | 5620 ± 140 | 2091 ± 29 | 84.15 ± 2.38 |
| [O III] 5007 | 40.37 ± 0.01 | 335 ± 62 | 236 ± 26 | 135.62 ± 0.93 |
| He I Narrow | — | — | — | — |
| He I Broad | — | — | — | — |
| [O I] 6300 | 39.48 ± 0.02 | 316 ± 62 | 132 ± 25 | 17.95 ± 0.43 |
| Hα Narrow | 40.02 ± 0.01 | 316 ± 62 | 132 ± 25 | 61.95 ± 0.49 |
| Hα Broad | 40.83 ± 0.01 | 3717 ± 92 | 1716 ± 25 | 401.36 ± 1.91 |
| [N II] 6585 | 40.09 ± 0.01 | 316 ± 62 | 132 ± 25 | 71.88 ± 0.49 |
| [S II] 6718 | 39.77 ± 0.01 | 316 ± 62 | 132 ± 25 | 34.42 ± 0.45 |
| [S II] 6732 | 39.70 ± 0.01 | 316 ± 62 | 132 ± 25 | 29.83 ± 0.47 |
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 | 14.95 |
|---|---|
| Hβ Broad SNR | 3.20 |
| Hγ Broad SNR | 0.87 |
| AGN frac | 0.21 |
| Host frac | 0.79 |
| log L5100,Host | 42.51 |
| Fe II/Hβ | 0.09 |
| Fe II/[O III] | 0.06 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 0 |
balmer_snr | 2 |
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.