J17289+3619sdO:
SDSSJ172854.34+361958.6 · 17:28:54.34 36:19:58.62 · Culpan knownhsd
outside the grid χ²/N = 0.95
Spectrum
shaded: the intervals the fit used · │ a cancelled pixeldrag on either panel to zoom · dbl-click or Esc to reset · arrows to pan
The whole reduced spectrum above, the region marked on it below. Shaded bands are the intervals the fit used; a tick under the axis marks a pixel the rejection mask cancelled.
Line-profile fit — Bamberg
Results and provenance
Fit — Bamberg
| Teff [K] | 59191 ± 635 |
| log g | 5.027 ± 0.148 |
| log n(He)/n(H) | 0.575 ± 0.119 |
| reduced χ² | 0.952 over 745 points |
| radial velocity | 367.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 15 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| settled | outside the grid |
| fitted | 04/09/2026 19:10:01 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | boss |
| date | 2011-06-27 |
| exposure | 3603 s in 8 |
| pipeline | v5_13_2 |
| cosmic rays | 7 pixels cancelled |
| S/N (classifier) | 42.8 |
| source file | spec-4995-55739-0968.fits |
Gaia astrometry
| Gaia DR3 source | 1336301562877544960 |
| parallax [mas] | -0.0459 ± 0.0581 |
| G | 17.146 |
| μα [mas/yr] | -2.143 |
| μδ [mas/yr] | -0.931 |
| l, b | 60.753, 31.521 |
Published (Culpan et al. 2022)
| class (Culpan) | O(He) |
| class (SIMBAD) | PG1159/O(He) |
| Teff [K] | 100000 ± 10000 |
| log g | 5.00 ± 0.20 |
| reference | 2014A&A...564A..53W |
Classifier
AGREES
fitted Teff 100000 logg 5.0 logY - 2014A&A...564A..53W
auto: He II/He I 9.6, EW 1.44, C 4650 0.93 (5 sigma), Mg I b suggests a companion but Ca II does not (0.5 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | 5.95 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | 5.31 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | 5.02 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | 4.86 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | 4.76 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | 4.70 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | 4.65 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | 4.62 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | 5.74 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | 6.62 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | 5.56 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | 5.14 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | 5.47 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | 4.93 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | 6.03 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |