J23105+6500sdB
23:10:34.20 65:00:33.70 · Culpan hotsd
χ²/N = 0.97
Spectrum
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
Line-profile fit — uli
Results and provenance
Fit — Bamberg
| Teff [K] | 35462 ± 400 |
| log g | 5.753 ± 0.055 |
| log n(He)/n(H) | -1.610 ± 0.064 |
| reduced χ² | 0.970 over 639 points |
| radial velocity | 11.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 12 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 19:11:02 |
Fit — uli
| Teff [K] | 34566 ± 261 |
| log g | 5.641 ± 0.055 |
| log n(He)/n(H) | -1.527 ± 0.059 |
| reduced χ² | 0.977 over 639 points |
| radial velocity | 11.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 12 |
| grids | h667.grid h909.grid h97.grid h99.grid +1 more |
| fitted | 04/09/2026 18:37:36 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | MWM / mwm_cb |
| field · MJD | 101707 · 60578 |
| date | 2024-09-24 |
| catalogid | 63050395050225199 |
| exposure | 1460 s in 2 |
| airmass | 1.41 |
| seeing (50%) | 1.74″ |
| E(B−V) | 0.212 |
| pipeline | v6_2_1 |
| cosmic rays | 3 pixels cancelled |
| S/N (classifier) | 41.1 |
| source file | spec-101707-60578-63050395050225199.fits |
Gaia astrometry
| Gaia DR3 source | 2208678999172871424 |
| parallax [mas] | 1.3657 ± 0.0169 |
| G | 14.591 |
| BP − RP | 0.117 |
| Gabs | 5.268 |
| μα [mas/yr] | 11.519 |
| μδ [mas/yr] | -1.443 |
| RUWE | 0.983 |
| l, b | 112.535, 4.194 |
| selection | f_plx |
Classifier
NEW
auto: contrast -0.03, within the 0.24 a subdwarf reaches at 32 kK, Mg I b suggests a companion but Ca II does not (-0.2 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | 0.18 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | 0.16 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | 0.15 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | 0.15 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | 0.14 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | 0.14 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | 0.14 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | 0.14 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | 0.17 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | 0.16 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | 0.15 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | 0.18 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 35462 K · log g 5.753 · E(44−55) 0.422 · χ²r 1.61 over 40 bands
distance 732 pc · parallax 1.3700 ± 0.0200 mas (1%) · R 0.1697 +0.0036 −0.0035 R☉ · M 0.594 +0.078 −0.068 M☉ — above the 0.47 canonical mass · L 41.0 +2.0 −1.9 L☉
Photometry against the model, with the residual beneath it in units of the error. The horizontal bar on each point is the passband, not an error; a hollow point was not fitted and the tooltip says why. Drag a box to zoom, double-click or Esc to come back out.