J/PAZh/37/377 UBV light curves of LT Del (Arkhipova+, 2011)
Symbiotic halo star LT Del:
Phase variations of the emission spectrum and parameters of the cool component.
Arkhipova V.P., Esipov V.F., Ikonnikova N.P., Komissarova G.V., Noskova R.I.
<Pis'ma Astron. Zh. 37, 377 (2011)>
=2011PAZh...37..377A 2011PAZh...37..377A
=2011AstL...37..343A 2011AstL...37..343A
ADC_Keywords: Stars, variable ; Photometry, UBV
Keywords: symbiotic stars - photometry - spectra
Abstract:
Long-term photometric and spectroscopic observations of the yellow
symbiotic star LT Del are analyzed. UBV light curves are presented.
Based on the observations of 20 cycles, we have refined the orbital
period of the star, P=476.0d±1.0d. The brightness has been found to
be unstable at some orbital phases with an amplitude up to 0.3m.
Description:
We have performed systematic photoelectric observations of LT Del
since 1982. Our UBV observations before 1994 were published previously
(Arkhipova and Noskova 1985PAZh...11..706A 1985PAZh...11..706A, 1988PAZh...14..445A 1988PAZh...14..445A;
Arkhipova et al. 1995PAZh...21..379A 1995PAZh...21..379A). The observations were continued
at same telescope, in the same photometric system, and with the same
comparison stars. Our 1995-2009 observations are presented in
Table 1.
Objects:
---------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------
20 35 57.2 +20 11 27 LT Del = Hen 2-467
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 28 200 UBV observations of LT Del in 1995-2009
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 I7 d JD Julian date
9- 13 F5.2 mag Vmag V magnitude
14 A1 --- u_Vmag Uncertainty flag on Vmag
16- 19 F4.2 mag B-V B-V colour index
20 A1 --- u_B-V Uncertainty flag on B-V
22- 26 F5.2 mag U-B U-B colour index
27 A1 --- u_U-B Uncertainty flag on U-B
28 A1 --- n_JD [*] * for Unpublished data for 1994-the end of
the major outburst
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-May-2011