J14143+2941sdB
PG1412+299 · 14:14:23.69 29:41:05.42 · Culpan knownhsd
χ²/N = 1.00
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] | 24764 ± 134 |
| log g | 5.724 ± 0.018 |
| log n(He)/n(H) | -3.993 ± 0.296 |
| reduced χ² | 0.996 over 659 points |
| radial velocity | -55.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 13 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 19:09:05 |
Fit — uli
| Teff [K] | 24728 ± 155 |
| log g | 5.627 ± 0.021 |
| log n(He)/n(H) | -3.306 ± 0.045 upper limit |
| reduced χ² | 1.001 over 659 points |
| radial velocity | -55.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 13 |
| grids | h909.grid h97.grid h99.grid h999.grid |
| settled | outside the grid |
| fitted | 04/09/2026 18:36:00 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | boss |
| date | 2013-02-06 |
| exposure | 6306 s in 14 |
| pipeline | v5_13_2 |
| cosmic rays | 3 pixels cancelled |
| S/N (classifier) | 72.6 |
| source file | spec-6497-56329-0278.fits |
Gaia astrometry
| Gaia DR3 source | 1260997037986811648 |
| parallax [mas] | 0.3991 ± 0.0658 |
| G | 16.637 |
| Gabs | 4.615 |
| μα [mas/yr] | -2.854 |
| μδ [mas/yr] | -6.711 |
| l, b | 45.799, 71.605 |
Published (Culpan et al. 2022)
| class (Culpan) | sdB |
| class (SIMBAD) | sdB |
| Teff [K] | 27449 ± 447 |
| log g | 5.81 ± 0.06 |
| log y | -4.01 ± 0.60 |
| reference | 2021ApJS..256...28L |
Classifier
AGREES
fitted Teff 27449 logg 5.81 logY -4.01 2021ApJS..256...28L
auto: contrast 0.13, within the 0.33 a subdwarf reaches at 26 kK
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -0.89 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.80 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.75 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.73 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.71 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.70 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.70 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.69 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| Hκ | 3750.15 | -0.69 | -10.0, 10.0 | 3.9 | -7.4, 8.7 |
| He II 4686 | 4685.70 | -0.86 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -0.82 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.74 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.90 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 24764 K · log g 5.724 · E(44−55) 0.022 · χ²r 0.82 over 35 bands
distance 2506 pc · parallax 0.4000 ± 0.0700 mas (18%) · R 0.1842 +0.0366 −0.0261 R☉ · M 0.657 +0.305 −0.185 M☉ — above the 0.47 canonical mass · L 11.5 +5.0 −3.1 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.