ESO 552-39
Observation
| Spectrum ID | 22635196_sp1 |
|---|---|
| Alt name | g0458403-215931 |
| z | 0.0398 |
| RA, Dec | 74.6680, -21.9919 |
| MJD | 60262.49 |
| SNR/Å B/R | 6.9/16.9 |
| Obs Airmass | 1.61 |
| SMSS ID | 22635196 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.1 ± 0.0 |
| 2MASS Kext | 12.1 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.033 |
| Power law αν | 0.44 ± 0.06 |
| log L5100,AGN | 42.24 ± 0.10 |
| log HβBr/[O III] | 0.15 ± 0.04 |
| log ML5100/M☉ | 7.18 ± 0.10 |
| log MHα/M☉ | 7.09 ± 0.03 |
| log MHβ/M☉ | 7.35 ± 0.09 |
| log M[O III]/M☉ | 7.40 ± 0.09 |
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 | 39.98 ± 0.19 | 1277 ± 69 | 453 ± 25 | 15.09 ± 4.41 |
| [O III] 4364 | 38.96 ± 0.40 | 153 ± 63 | 63 ± 25 | 1.81 ± 1.44 |
| He II Narrow | 38.78 ± 0.45 | 153 ± 63 | 63 ± 25 | 1.45 ± 1.32 |
| He II Broad | 39.60 ± 0.32 | 1427 ± 63 | 606 ± 25 | 9.36 ± 4.22 |
| Hβ Narrow | 39.34 ± 0.35 | — | 219 ± 25 | 5.72 ± 2.09 |
| Hβ Broad | 40.86 ± 0.03 | 3269 ± 307 | 1296 ± 33 | 188.43 ± 7.09 |
| [O III] 5007 | 40.72 ± 0.02 | — | 219 ± 25 | 145.32 ± 2.56 |
| He I Narrow | — | — | — | — |
| He I Broad | 40.19 ± 0.07 | 3023 ± 63 | 1284 ± 25 | 63.25 ± 5.37 |
| [O I] 6300 | 39.25 ± 0.13 | 153 ± 63 | 63 ± 25 | 8.81 ± 1.39 |
| Hα Narrow | 39.78 ± 0.05 | 153 ± 63 | 63 ± 25 | 32.96 ± 1.82 |
| Hα Broad | 41.45 ± 0.01 | 2874 ± 86 | 1102 ± 25 | 1533.28 ± 7.87 |
| [N II] 6585 | 39.95 ± 0.03 | 153 ± 63 | 63 ± 25 | 48.49 ± 1.74 |
| [S II] 6718 | 39.48 ± 0.06 | 153 ± 63 | 63 ± 25 | 17.26 ± 1.65 |
| [S II] 6732 | 39.30 ± 0.13 | 153 ± 63 | 63 ± 25 | 11.66 ± 1.58 |
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 | 11.58 |
|---|---|
| Hβ Broad SNR | 3.51 |
| Hγ Broad SNR | 1.36 |
| AGN frac | 0.15 |
| Host frac | 0.86 |
| log L5100,Host | 43.01 |
| Fe II/Hβ | 0.24 |
| Fe II/[O III] | 0.34 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 0 |
balmer_snr | 1 |
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.