1RXS J175706.6-451556
Observation
| Spectrum ID | 362520214_sp1 |
|---|---|
| Alt name | 5954488134593658752 |
| z | 0.0696 |
| RA, Dec | 269.2794, -45.2652 |
| MJD | 60830.57 |
| SNR/Å B/R | 16.7/28.5 |
| Obs Airmass | 1.07 |
| SMSS ID | 362520214 |
| Closest SMSS | 10.93'', 362520222 |
| SMSS Mean r6"ap | 15.2 ± 0.0 |
| 2MASS Kext | nan ± nan |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | AllBRICQS2 |
| MW E(B−V) | 0.136 |
| Power law αν | -1.63 ± 0.04 |
| log L5100,AGN | 43.82 ± 0.02 |
| log HβBr/[O III] | -0.24 ± 0.09 |
| log ML5100/M☉ | 7.25 ± 0.31 |
| log MHα/M☉ | 7.68 ± 0.02 |
| log MHβ/M☉ | 6.91 ± 0.32 |
| log M[O III]/M☉ | 7.16 ± 0.31 |
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 | 40.07 ± 0.39 | 396 ± 65 | 390 ± 29 | 0.86 ± 0.75 |
| Hγ Broad | 41.51 ± 0.09 | 5880 ± 1291 | 2539 ± 248 | 23.95 ± 2.27 |
| [O III] 4364 | — | — | — | — |
| He II Narrow | 39.66 ± 0.45 | 317 ± 63 | 134 ± 25 | 0.35 ± 0.33 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.64 ± 0.23 | 396 ± 65 | 391 ± 29 | 3.31 ± 0.75 |
| Hβ Broad | 41.22 ± 0.09 | 1633 ± 796 | 922 ± 36 | 12.64 ± 0.94 |
| [O III] 5007 | 41.45 ± 0.02 | 396 ± 65 | 391 ± 29 | 21.95 ± 0.76 |
| He I Narrow | 39.81 ± 0.35 | 317 ± 63 | 134 ± 25 | 0.53 ± 0.25 |
| He I Broad | 40.48 ± 0.21 | 1685 ± 63 | 715 ± 25 | 2.44 ± 0.60 |
| [O I] 6300 | 40.12 ± 0.16 | 317 ± 63 | 134 ± 25 | 1.11 ± 0.26 |
| Hα Narrow | 40.95 ± 0.03 | 317 ± 63 | 134 ± 25 | 7.58 ± 0.30 |
| Hα Broad | 42.11 ± 0.02 | 3560 ± 82 | 2388 ± 69 | 109.85 ± 1.81 |
| [N II] 6585 | 40.74 ± 0.05 | 317 ± 63 | 134 ± 25 | 4.75 ± 0.30 |
| [S II] 6718 | 40.59 ± 0.07 | 317 ± 63 | 134 ± 25 | 3.36 ± 0.31 |
| [S II] 6732 | 40.42 ± 0.10 | 317 ± 63 | 134 ± 25 | 2.27 ± 0.30 |
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 | 5.30 |
|---|---|
| Hβ Broad SNR | 1.96 |
| Hγ Broad SNR | 1.54 |
| AGN frac | 0.38 |
| Host frac | 0.62 |
| log L5100,Host | 44.03 |
| Fe II/Hβ | 4.09 |
| Fe II/[O III] | 2.38 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 1 |
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.