J13233+2616sdOB

PG1321+265  ·  13:23:23.57 26:16:32.30  ·  Culpan knownhsd

χ²/N = 0.97

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.

Line-profile fit — uli

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

Results and provenance

Fit — Bamberg

Teff [K]34798 ± 235
log g5.851 ± 0.030
log n(He)/n(H)-1.659 ± 0.052
reduced χ²0.971 over 641 points
radial velocity-29.0 km s−1
resolution (FWHM)2.00 Å
lines fitted12
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 19:08:58

Fit — uli

Teff [K]34107 ± 171
log g5.792 ± 0.033
log n(He)/n(H)-1.657 ± 0.053
reduced χ²0.973 over 641 points
radial velocity-29.0 km s−1
resolution (FWHM)2.00 Å
lines fitted12
gridsh667.grid
h909.grid
h97.grid
h99.grid
+1 more
fitted04/09/2026 18:35:54

Observation

telescopeSDSS 2.5-M
survey / programmeboss
date2013-01-17
exposure5405 s in 12
pipelinev5_13_2
S/N (classifier)64.5
source filespec-5997-56309-0016.fits

Gaia astrometry

Gaia DR3 source1449056067988016128
parallax [mas]0.4181 ± 0.0637
G16.165
Gabs4.266
μα [mas/yr]-6.893
μδ [mas/yr]-6.952
l, b27.927, 82.814

Published (Culpan et al. 2022)

class (Culpan)sdOB
class (SIMBAD)sdBO
Teff [K]36388 ± 231
log g5.73 ± 0.04
log y-1.66 ± 0.04
reference2021ApJS..256...28L

Classifier

AGREES

fitted Teff 36388 logg 5.73 logY -1.66 2021ApJS..256...28L

auto: He II 0.61 (5.8 sigma), Ca II 8662/8542 = 7.9 -- the star's own Paschen lines, not a companion

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-0.47-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-0.42-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.40-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.38-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.38-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.37-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.37-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.36-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-0.45-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-0.43-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.39-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-0.48-15.0, 15.05.1-15.0, 15.0

Spectral energy distribution

Teff 34798 K · log g 5.851 · E(44−55) 0.010 · χ²r 0.45 over 40 bands

distance 2392 pc · parallax 0.4200 ± 0.0600 mas (14%) · R 0.1539 +0.0279 −0.0203 R☉ · M 0.614 +0.259 −0.163 M☉ · L 31.3 +12.4 −7.8 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.