J17416+0306sdO

PN-DeHt2 · 17:41:40.90 03:06:57.53 · Culpan knownhsd

outside the grid χ²/N = 0.96

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]	58946 ± 316
log g	6.122 ± 0.063
log n(He)/n(H)	-0.832 ± 0.052
reduced χ²	0.957 over 744 points
radial velocity	-145.0 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 19:10:04

Observation

telescope	SDSS 2.5-M
survey / programme	MWM / MWM_30min4
field · MJD	015344 · 59302
date	2021-03-29
catalogid	5177261809
exposure	3600 s in 4
airmass	1.27
seeing (50%)	1.45″
E(B−V)	0.215
pipeline	v6_2_1
S/N (classifier)	58.2
source file	spec-015344-59302-5177261809.fits

Gaia astrometry

Gaia DR3 source	4376331092036268032
parallax [mas]	0.5725 ± 0.0416
G	14.984
BP − RP	-0.330
G_abs	3.847
μ_α [mas/yr]	-4.896
μ_δ [mas/yr]	-8.948
l, b	27.650, 16.925

Published (Culpan et al. 2022)

class (Culpan)	O(H)
T_eff [K]	117000 ± 6300
log g	5.64 ± 0.22
log y	-0.79 ± 0.12
reference	1999A&A...350..101N

Classifier

AGREES

fitted Teff 117000 logg 5.64 logY -0.79 1999A&A...350..101N

auto: He II/He I 9.2, EW 1.38, Mg I b suggests a companion but Ca II does not (-0.8 sigma)

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-2.35	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-2.10	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-1.98	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-1.92	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-1.88	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-1.86	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-1.84	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-1.82	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-2.27	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	-2.62	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	-2.20	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	-2.03	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	-2.16	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-1.95	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-2.38	-15.0, 15.0	5.1	-15.0, 15.0