J13033+1031sdO

SDSSJ130318.39+103101.8 · 13:03:18.38 10:31:01.85 · Culpan knownhsd

outside the grid 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]	55427 ± 2537
log g	6.109 ± 0.149
log n(He)/n(H)	-1.290 ± 0.155
reduced χ²	1.004 over 745 points
radial velocity	-228.0 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 19:08:56

Observation

telescope	SDSS 2.5-M
survey / programme	boss
date	2012-02-23
exposure	5405 s in 12
pipeline	v5_13_2
cosmic rays	3 pixels cancelled
S/N (classifier)	24.3
source file	spec-5421-55980-0542.fits

Gaia astrometry

Gaia DR3 source	3736087768985356288
parallax [mas]	0.0644 ± 0.2272
G	18.751
μ_α [mas/yr]	-7.090
μ_δ [mas/yr]	-3.513
l, b	313.047, 73.155

Published (Culpan et al. 2022)

class (Culpan)	sdO
class (SIMBAD)	DAO
T_eff [K]	56774 ± 3677
log g	5.78 ± 0.18
log y	-0.75 ± 0.22
reference	2019MNRAS.486.2169K

Classifier

AGREES

fitted Teff 56774 logg 5.78 logY -0.75 2019MNRAS.486.2169K

auto: He II/He I 9.4, EW 1.40, red end too noisy for Ca II (S/N 5) -- a companion is neither seen nor excluded

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-3.70	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-3.30	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-3.12	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-3.02	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-2.96	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-2.92	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-2.89	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-2.87	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-3.56	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	-4.12	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	-3.45	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	-3.19	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	-3.40	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-3.06	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-3.74	-15.0, 15.0	5.1	-15.0, 15.0