J/PAZh/35/44 BV light curves of 33 ASAS-3 Cepheids (Berdnikov+, 2009)
Photometric observations of Cepheids from the ASAS-3 catalog:
Photoelectric BVIc observations of 33 classical Cepheids.
Berdnikov L.N., Kniazev A.Yu., Kravtsov V.V., Pastukhova E.N., Turner D.G.
<Pis'ma Astron. Zh. 35, 44 (2009)>
=2009PAZh...35...44B 2009PAZh...35...44B
=2009AstL...35...39B 2009AstL...35...39B
ADC_Keywords: Stars, variable ; Photometry, UBVRI
Keywords: Cepheids - photometry
Abstract:
Cepheids, the principal distance indicators, point to the existence of
two inner Galactic spiral arms in the immediate solar neighborhood
(within 5kpc). However, the available Cepheids are clearly
insufficient for a detailed study of the structure of these arms.
Fortunately, southern-sky monitoring (the ASAS project) has led to the
discovery of many new variable stars, more than one thousand of which
have been identified as possible Cepheids. To improve the
classification and to construct reliable light curves for new
Cepheids, we have begun their regular photometric observations. Here,
we present the first results: 1192 photoelectric BVIc observations
were performed for 33 classicalCepheidswith the 76-cm telescope of the
South-African Astronomical Observatory (SAAO, the South-African
Republic) from December 2006 to January 2008.We provide tables of
observations and V light and B-V and V-Ic color curves. The new
observations together with ASAS-3 data have been used to improve the
elements of the light variations.
Description:
All brightness measurements were made from December 2006 to January
2008 with the 76-cm telescope of the South-African Astronomical
Observatory (SAAO) in the South-African Republic.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 47 1192 Photoelectric observations of Cepheids from the
ASAS-3 catalog
table2.dat 34 33 Elements of the light variations for Cepheids
from the ASAS-3 catalog
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See also:
II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- ASAS ASAS name (HHMMSS+DDMM.m),
ASAS JHHMMSS+DDMM.m in Simbad
16- 27 F12.4 d JD [2454076/2454477] Julian date
30- 35 F6.3 mag Vmag ? Johnson V magnitude
37- 41 F5.3 mag B-V ? Johnson B-V color index
43- 47 F5.3 mag V-Ic ? Johnson-Cousins V-Ic color index
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- ASAS ASAS name (HHMMSS+DDMM.m),
ASAS JHHMMSS+DDMM.m in Simbad
15- 25 F11.3 d HJD Initial epoch
27- 34 F8.5 d Per Period
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(End) Veta Avedisova [INASAN] 05-Mar-2009