J/MNRAS/456/314 Observing log of the eclipsing binary SZ Piscium (Xiang+, 2016)
The first Doppler images of the eclipsing binary SZ Piscium.
Xiang Y., Gu S., Collier Cameron A., Barnes J.R., Zhang L.
<Mon. Not. R. Astron. Soc., 456, 314-322 (2016)>
=2016MNRAS.456..314X 2016MNRAS.456..314X (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Spectroscopy
Keywords: stars: activity - binaries: eclipsing - stars: imaging -
stars: individual: SZ Psc - starspots
Abstract:
We present the first Doppler images of the active eclipsing binary system
SZ Psc, based on the high-resolution spectral data sets obtained in 2004
November and 2006 September-December. The least-squares deconvolution
technique was applied to derive high signal-to-noise profiles from the
observed spectra of SZ Psc. Absorption features contributed by a third
component of the system were detected in the LSD profiles at all observed
phases. We estimated the mass and period of the third component to be
about 0.9 M☉ and 1283±10 d, respectively. After removing the
contribution of the third body from the least-squares deconvolved profiles,
we derived the surface maps of SZ Psc. The resulting Doppler images
indicate significant star-spot activities on the surface of the K subgiant
component. The distributions of star-spots are more complex than that
revealed by previous photometric studies. The cooler K component exhibited
pronounced high-latitude spots as well as numerous low- and
intermediate-latitude spot groups during the entire observing seasons,
but did not show any large, stable polar cap, different from many other
active RS CVn-type binaries.
Description:
The observations of SZ Psc were carried out on 2004 November 20-27,
2006 September 01-06, 2006 October 28-30, 2006 November 28-December 01
and 2006 December 07-11, using the Coude echelle spectrograph (Zhao & Li
2001ChJAA...1..555Z 2001ChJAA...1..555Z) mounted on the 2.16m telescope at the Xinglong station
of the National Astronomical Observatories of China. In all observations,
a 1024x1024 pixel TEK CCD detector was deployed to record the data. As
results, the spectral region was about 5600-9000 Å and the resolution
was R=37000.
Objects:
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RA (ICRS) DE Designation(s)
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23 13 23.78 +02 40 31.6 SZ Piscium = V* SZ Psc
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 34 50 The full version of the observing log
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See also:
V/118 : Catalog of eclipsing binaries parameters (Perevozkina+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "date" Date UT date of observation
12- 20 F9.4 d HJD [3330.10/4081.12] Heliocentric Julian Date
(HJD-2450000)
22- 25 I4 s Exp [1500/3600] Exposure time
27- 29 I3 --- S/N1 [45/149] Peak signal-to-noise ratio of the observed
spectra
31- 34 I4 --- S/N2 [621/2039] Signal-to-noise ratio of the
corresponding least-squares deconvolution (LSD)
profile
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History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 21-Feb-2020