J/PAZh/38/183 IRAS 19336-0400 UBV light curves (Arkhipova+, 2012)
Variability of hot supergiant IRAS 19336-0400 in the early phase of planetary
nebula ionization.
Arkhipova V.P., Burlak M.A., Esipov V.F., Ikonnikova N.P., Komissarova G.V.
<Pis'ma Astron. Zh. 38, 183 (2012)>
=2012PAZh...38..183A 2012PAZh...38..183A
=2012AstL...38..157A 2012AstL...38..157A
ADC_Keywords: Stars, supergiant ; Photometry, UBV
Keywords: proto-planetary nebulae - photometric and spectral observations -
light variability
Abstract:
We present photoelectric and spectral observations of a hot candidate
proto-planetary nebula early B-type supergiant with emission lines in
spectrum-IRAS 19336-0400. The light and color curves display fast
irregular brightness variations with maximum amplitudes
{Detla}V=0.30m, {Detla}B=0.35m, {Detla}U=0.40m and color-brightness
correlations. By the variability characteristics IRAS 19336-0400
appears similar to other hot proto-planetary nebulae
Description:
In 2006 we started systematic photometric observations of IRAS
19336-0400. Measurements were carried out on the 60-cm telescope
Zeiss-1 at SAI Crimean Station with the use of photoelectric UBV
photometer constructed by Lyuty (1971, Soobshch. GAISh 172, 30).
Objects:
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RA (2000) DE Designation(s)
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19 36 17.52 -03 53 25.3 IRAS 19336-0400 = PN G034.5-11.7
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 24 155 UBV observations of IRAS 19336-0400 in 2006-2011
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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
15- 18 F4.2 mag B-V B-V colour index
20- 24 F5.2 mag U-B U-B colour index
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Apr-2012