J02061+3738

FBS0203+374  ·  Culpan knownhsd

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

profile fit on the Bamberg grid
Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

Teff [K]26462 ± 240
log g5.453 ± 0.040
log n(He)/n(H)-2.955 ± 0.097
reduced χ²0.990 over 659 points
radial velocity-54.0 km s−1
resolution (FWHM)2.50 Å
lines fitted13
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:25:46

Fit — Lei (TLUSTY)

Teff [K]27630 ± 220
log g5.410 ± 0.030
log n(He)/n(H)-2.850 ± 0.120
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays6 pixels cancelled
source filespec-57760-HD021554N364614B01_sp14-015.fits.gz

Gaia astrometry

Gaia DR3 source330722897089067392
parallax [mas]1.0476 ± 0.0367
G14.154
Gabs4.301
μα [mas/yr]2.750
μδ [mas/yr]-4.878
l, b138.909, -22.895

Published (Culpan et al. 2022)

class (Culpan)sdB
class (SIMBAD)sdB
Teff [K]28744 ± 303
log g5.47 ± 0.04
log y-2.93 ± 0.07
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-0.88-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-0.78-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.74-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.72-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.70-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.69-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.68-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.68-13.0, 13.03.9-11.7, 11.6
Hκ3750.15-0.68-10.0, 10.03.9-7.4, 8.7
He II 46864685.70-0.84-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-0.81-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.73-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-0.89-15.0, 15.05.1-15.0, 15.0