J15351-0724sdO
PG1532-072 · 15:35:07.20 -07:24:33.98 · Culpan knownhsd
outside the grid χ²/N = 0.99
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] | 56654 ± 1144 |
| log g | 5.775 ± 0.119 |
| log n(He)/n(H) | -0.652 ± 0.097 |
| reduced χ² | 0.992 over 745 points |
| radial velocity | -53.0 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 19:09:27 |
Observation
| telescope | LCO Du Pont |
| survey / programme | MWM / mwm_cb |
| field · MJD | 105976 · 60434 |
| date | 2024-05-04 |
| catalogid | 63050395713720700 |
| exposure | 2700 s in 3 |
| airmass | 1.15 |
| seeing (50%) | 1.27″ |
| E(B−V) | 0.120 |
| pipeline | v6_2_1 |
| S/N (classifier) | 35.0 |
| source file | spec-105976-60434-63050395713720700.fits |
Gaia astrometry
| Gaia DR3 source | 4396992255548410752 |
| parallax [mas] | 0.3498 ± 0.0621 |
| G | 16.242 |
| BP − RP | -0.362 |
| Gabs | 3.982 |
| μα [mas/yr] | -3.813 |
| μδ [mas/yr] | -2.305 |
| l, b | 357.835, 37.450 |
Published (Culpan et al. 2022)
| class (Culpan) | sdOB |
| class (SIMBAD) | sdOB |
Classifier
DISPUTED
auto: He II/He I 14.4, EW 2.16, 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 | -0.86 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.77 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.73 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.70 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.69 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.68 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.67 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.67 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -0.83 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -0.96 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -0.80 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -0.74 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -0.79 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.71 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.87 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |