J10428+0333sdO

SDSSJ104248.94+033355.3 · 10:42:48.94 03:33:55.33 · Culpan knownhsd

χ²/N = 1.00

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

Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

T_eff [K]	38412 ± 806
log g	5.322 ± 0.087
log n(He)/n(H)	-2.196 ± 0.154
reduced χ²	0.999 over 722 points
radial velocity	-495.0 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
fitted	04/09/2026 19:08:26

Observation

telescope	SDSS 2.5-M
survey / programme	boss
date	2011-03-29
exposure	6306 s in 14
pipeline	v5_13_2
S/N (classifier)	38.7
source file	spec-4733-55649-0548.fits

Gaia astrometry

Gaia DR3 source	3857558549446591872
parallax [mas]	-0.0643 ± 0.1335
G	17.527
μ_α [mas/yr]	-4.491
μ_δ [mas/yr]	-1.321
l, b	244.778, 51.294

Published (Culpan et al. 2022)

class (Culpan)	sdOB
class (SIMBAD)	DAO
T_eff [K]	41200 ± 3200
log g	4.83 ± 0.15
log y	-2.10 ± 0.40
reference	2015A&A...577A..26G

Classifier

DISPUTED

fitted Teff 41200 logg 4.83 logY -2.1 2015A&A...577A..26G

auto: He II/He I 1.9, EW 0.67

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-8.03	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-7.17	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-6.77	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-6.56	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-6.42	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-6.33	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-6.27	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-6.23	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-7.74	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	-8.94	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	-7.50	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	-6.93	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	-7.38	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-6.65	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-8.13	-15.0, 15.0	5.1	-15.0, 15.0