J/MNRAS/411/1585 CZ Lac multiperiodic Blazhko modulation (Sodor+, 2011)
The multiperiodic Blazhko modulation of CZ Lacertae.
Sodor A., Jurcsik J., Szeidl B., Varadi M., Henden A., Vida K., Hurta Zs.,
Posztobanyi K., Dekany I., Szing A.
<Mon. Not. R. Astron. Soc., 411, 1585-1596 (2011)>
=2011MNRAS.411.1585S 2011MNRAS.411.1585S
ADC_Keywords: Stars, variable ; Photometry, UBVRI
Keywords: methods: data analysis - techniques: photometric -
stars: horizontal branch - stars: individual: CZ Lac -
stars: oscillations - stars: variables: RR Lyrae
Abstract:
A thorough analysis of the multicolour CCD observations of the
RRab-type variable, CZ Lacertae, is presented. The observations were
carried out in two consecutive observing seasons in 2004 and 2005
within the framework of the Konkoly Blazhko Survey of bright,
northern, short-period RRab variables.
Description:
CZ Lac was observed with a photometer attached to the 60-cm telescope
of the Konkoly Observatory, Svabhegy, Budapest, through B and V
filters on seven nights in 1967 (table A1), and 2 seasons between
2004 and 2005.
We observed CZ Lac with the same, refurbished and automated 60-cm
telescope equipped with a Wright Instruments 750x1100 CCD camera
(field of view 17x24arcmin) in 2004 and 2005. About 29 000 frames
were obtained in BV(RI)C bands. The data of the two seasons spanned
146 and 84d.
Objects:
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RA (2000) DE Designation(s)
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22 19 30.8 +51 28 15 CZ Lac = V* CZ Lac
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 132 134 Light-curve solutions of CZ Lac for the first
CCD observing season in B, V, Rc and Ic bands
(JD 2453266-2453411 = 2004-09-17/2005-02-09)
table6.dat 132 119 Light-curve solutions of CZ Lac for the second
CCD observing season in B, V, Rc and Ic bands
(JD 2453648-2453731 = 2005-10-04/2005-12-26)
tablea1.dat 24 272 Photoelectric B and V time series of CZ Lac
relative to the comparison star BD+50 3664 in 1967
tablea2.dat 99 761 Photometric B, V, Rc and Ic sequence in the
field of CZ Lac (A. Henden)
tablea3.dat 24 6680 CCD deltaB time series of CZ Lac
tablea4.dat 24 8143 CCD deltaV time series of CZ Lac
tablea5.dat 24 7095 CCD deltaR time series of CZ Lac
tablea6.dat 24 7000 CCD deltaI time series of CZ Lac
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Byte-by-byte Description of file: table[56].dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Mode Frequency identification (2)
18- 28 F11.8 d-1 Freq Frequency
30- 35 F6.4 mag Bamp Amplitude in Johnson B band
37- 42 F6.4 mag e_Bamp rms uncertainty on Bamp
44- 48 F5.3 rad Bphase Phase in Johnson B band (1)
50- 54 F5.3 rad e_Bphase rms uncertainty on Bphase
56- 61 F6.4 mag Vamp Amplitude in Johnson V band
63- 68 F6.4 mag e_Vamp rms uncertainty on Vamp
70- 74 F5.3 rad Vphase Phase in Johnson V band (1)
76- 80 F5.3 rad e_Vphase rms uncertainty on Vphase
82- 87 F6.4 mag Ramp Amplitude in Cousins R band
89- 94 F6.4 mag e_Ramp rms uncertainty on Ramp
96-100 F5.3 rad Rphase Phase in Cousins R band (1)
102-106 F5.3 rad e_Rphase rms uncertainty on Rphase
108-113 F6.4 mag Iamp Amplitude in Cousins I band
115-120 F6.4 mag e_Iamp rms uncertainty on Iamp
122-126 F5.3 rad Iphase Phase in Cousins I band (1)
128-132 F5.3 rad e_Iphase rms uncertainty on Iphase
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Note (1): Phases correspond to cosine decomposition and to
T0=2453266.0 HJD epoch in table5 and
T0=2453648.0 HJD epoch in table6.
Note (2): Mixture of (values for first and second season):
fp = frequency pulsation (2.313887d-1 and 2.313910d-1)
fm1 = first modulation frequency (0.05406d-1 and 0.05347d-1)
fm2 = second modulation frequency (0.06757d-1 and 0.06954d-1)
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Byte-by-byte Description of file: tablea[13456].dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian date
16- 21 F6.3 mag Dmag Differential magnitude
24 A1 --- Band [BVRI] band
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
12- 16 F5.3 arcsec e_RAdeg rms uncertainty on RAdeg
18- 26 F9.6 deg DEdeg Declination in decimal degrees (J2000)
28- 32 F5.3 arcsec e_DEdeg rms uncertainty on DEdeg
34- 35 I2 --- N Number of observations
37- 42 F6.3 mag Vmag Johnson V magnitude
44- 48 F5.3 mag B-V Johnson B-V colour index
50- 55 F6.3 mag V-Rc Johnson-Cousins V-R colour index
57- 61 F5.3 mag Rc-Ic Cousins R-I colour index
63- 67 F5.3 mag V-Ic Johnson-Cousins V-I colour index
69- 73 F5.3 mag e_Vmag rms uncertainty on Vmag
75- 79 F5.3 mag e_B-V rms uncertainty on B-V
81 A1 --- --- [-]
82- 86 F5.3 mag e_V-Rc rms uncertainty on V-R
88 A1 --- --- [-]
89- 93 F5.3 mag e_Rc-Ic ?=- rms uncertainty on R-I
95- 99 F5.3 mag e_V-Ic ?=- rms uncertainty on V-I
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Sep-2011