J/AJ/130/832 VR photometry of type II Cepheids. III (Schmidt+, 2005)
Photometry of type II cepheids. III. The intermediate-period stars.
Schmidt E.G., Johnston D., Langan S., Lee K.M.
<Astron. J., 130, 832-841 (2005)>
=2005AJ....130..832S 2005AJ....130..832S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, population II ; Stars, variable ; Photometry
Keywords: Cepheids - stars: Population II
Abstract:
We present 741 new photometric observations for 22 Cepheids with
periods between 3 and 8 days. Many of the stars are probable type II
Cepheids, but we have included some type I Cepheids for comparison.
Description:
The observations were all made at Behlen Observatory with the 0.76m
telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 77 22 The light curve parameters
table2.dat 40 741 Photometric data
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See also:
J/AJ/106/2429 : Behlen Obs. variables stars survey (Schmidt+, 1993)
J/AJ/128/1748 : VR photometry of type II Cepheids (Schmidt+, 2004)
J/AJ/129/2007 : Photometry of type II Cepheids. II (Schmidt+, 2005)
II/217 : Photoelectric observations of Cepheids in UBV(RI)c
(Berdnikov, 1997)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Cepheid name
10- 17 F8.6 d Per Adopted period
19- 26 F8.6 d e_Per Upper limit on the uncertainty of Per
28- 35 F8.5 d DelP ? Difference between Per and the GCVS period
37 A1 --- f_DelP [bg] Flag on DelP (1)
39- 48 F10.2 d HJD Heliocentric Julian Date of maximum epoch
50- 54 F5.2 mag <Vmag> The V band intensity mean magnitude
56- 60 F5.2 mag <Rmag> The R band intensity mean magnitude
62- 65 F4.2 mag Vamp The V band amplitude
67- 70 F4.2 mag Ramp ? The R band amplitude
72- 75 F4.2 rad phi Phase of minimum light
77 A1 --- Note Additional note (2)
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Note (1): Flag on DelP, defined as follows:
b = The GCVS period of 4.834225 days is evidently in error.
g = The GCVS does not list a period for V394 Cep.
Note (2): Additional note, defined as follows:
a = The new period and light curve parameters were determined from all of
the available data.
c = All of the data was used to determine the period for BD Cas but only
the present data and that from Schmidt and Reiswig (1993,
Cat. J/AJ/106/2429) was used to determine the other light curve
parameters.
d = For V572 Aql, the data of Szabados 1977MiBud..70....1S 1977MiBud..70....1S (JD 2441568 to
2441944) is systematically 0.09 magnitudes fainter than ours while that
of Henden 1980MNRAS.192..621H 1980MNRAS.192..621H (JD 2443630 to 2443776) is systematically
0.05mag fainter than the present results. Whether this represents a
systematic change in the mean magnitude is unclear so no corrections
were applied to any of the photometry. The period was determined by
requiring the maxima from the three sets to match. The remaining
parameters were determined from the Behlen Observatory data only.
e = New period was not significantly different from GCVS period so latter
was used. The light curves parameters were determined from all of the
data.
f = For TX Del, the new period was not significantly different from the
GCVS period so the latter was adopted. The light curve parameters
were determined from the present data only.
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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- 8 A8 --- Name Cepheid name
10- 20 F11.3 d HJD Heliocentric Julian Date
22- 27 F6.3 mag Vmag The V band magnitude
29- 34 F6.3 mag Rmag The R band magnitude
36- 40 F5.3 mag V-R The (V-R) color index
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History:
From electronic version of the journal
References:
Schmidt et al., Paper I 2004AJ....128.1748S 2004AJ....128.1748S, Cat. J/AJ/128/1748
Schmidt et al., Paper II 2005AJ....129.2007S 2005AJ....129.2007S
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 26-Apr-2006