J/AcA/60/17 VI light curves of SMC classical Cepheids (Soszynski+, 2010)
The Optical Gravitational Lensing Experiment.
The OGLE-III Catalog of variable stars.
VII. Classical Cepheids in the Small Magellanic Cloud.
Soszynski I., Poleski R., Udalski A., Szymanski M.K., Kubiak M.,
Pietrzynski G., Wyrzykowski L., Szewczyk O., Ulaczyk K.
<Acta Astron., 60, 17-39 (2010)>
=2010AcA....60...17S 2010AcA....60...17S
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Magnitudes
Keywords: Cepheids - stars: oscillations - Magellanic Clouds
Abstract:
The seventh part of the OGLE-III Catalog of Variable Stars (OIII-CVS)
consists of 4630 classical Cepheids in the Small Magellanic Cloud
(SMC). The sample includes 2626 fundamental-mode (F), 1644
first-overtone (1O), 83 second-overtone (2O), 59 double-mode F/1O, 215
double-mode 1O/2O, and three triple-mode classical Cepheids. For each
object basic parameters, multi-epoch VI photometry collected within 8
or 13 years of observations, and finding charts are provided in the
OGLE Internet archive.
Description:
We present objects of particular interest: exceptionally numerous
sample of single-mode second-overtone pulsators, five double Cepheids,
two Cepheids with eclipsing variations superimposed on the pulsation
light curves. At least 139 first-overtone Cepheids exhibit
low-amplitude secondary variations with periods in the range 0.60-0.65
of the primary ones. These stars populate three distinct sequences in
the Petersen diagram. The origin of this secondary modulation is still
unknown. Contrary to the Large Magellanic Cloud (LMC) we found only a
few candidates for anomalous Cepheids in the SMC. This fact may be a
clue for the explanation of the origin of the anomalous Cepheids. The
period and luminosity distributions of Cepheids in both Magellanic
Clouds suggest that there are two or three populations of classical
Cepheids in each of the galaxies. The main difference between the LMC
and SMC lays in different numbers of Cepheids in each group. We fit
the period-luminosity (PL) relations of SMC Cepheids and compare them
with the LMC PL laws.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 322 4630 Catalog of fundamental-mode, first-overtone,
second-overtone, double-mode and triple-mode
Cepheids in the Small Magellanic Cloud
remarks.dat 77 252 Remarks
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See also:
J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)
J/AcA/58/293 : VI lc of LMC type II & anomalous Cepheids (Soszynski+, 2008)
J/AcA/59/1 : VI light curves of LMC RR Lyrae (Soszynski+, 2009)
J/AcA/59/239 : VI light curves of LMC long-period variables (Soszynski+, 2009)
J/AcA/59/335 : VI light curves of LMC R CBr stars (Soszynski+, 2009)
J/AcA/60/1 : VI light curves of LMC delta Scuti stars (Soszynski+, 2009)
J/AcA/60/91 : VI light curves of SMC type II Cepheids (Soszynski+, 2010)
J/AcA/60/165 : VI light curves of SMC RR Lyrae (Soszynski+, 2010)
J/AcA/60/179 : LMC double periodic variables VI light curves (Poleski+, 2011)
J/AcA/61/1 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2011)
J/AcA/61/103 : VI light curves of LMC eclipsing binaries (Szymanski+, 2011)
J/AcA/61/217 : VI light curves of SMC long-period variables (Soszynski+, 2011)
J/AcA/61/285 : VI light curves of Galactic Bulge Cepheids (Soszynski+, 2011)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- --- [OGLE-SMC-CEP-]
14- 17 I04 --- Star Cepheid ID (OGLE-SMC-CEP-NNNN)
20- 27 A8 --- Field OGLE-III field (SMCNNN.N)
29- 34 I6 --- OGLE ? OGLE-III database number
36- 43 A8 --- Mode Mode(s) of pulsation
46- 47 I2 h RAh Right ascension, equinox J2000.0 (hours)
49- 50 I2 min RAm Right ascension, equinox J2000.0 (minutes)
52- 56 F5.2 s RAs Right ascension, equinox J2000.0 (seconds)
58 A1 --- DE- Declination, equinox J2000.0 (sign)
59- 60 I2 deg DEd Declination, equinox J2000.0 (degrees)
62- 63 I2 arcmin DEm Declination, equinox J2000.0 (arc minutes)
65- 68 F4.1 arcsec DEs Declination, equinox J2000.0 (arc seconds)
70- 75 F6.3 mag <Imag> Intensity mean I-band magnitude
77- 82 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
84- 94 F11.7 d Per Period (longest period for double and triple
mode)
96-104 F9.7 d e_Per Uncertainty of the longest period
107-116 F10.5 d T0 Time of maximum brightness (HJD-2450000)
119-123 F5.3 mag Iamp I-band amplitude (maximum-minimum)
126-130 F5.3 --- R21 ?=- Fourier coefficient R21
132-136 F5.3 --- phi21 ?=- Fourier coefficient φ21
139-143 F5.3 --- R31 ?=- Fourier coefficient R31
145-149 F5.3 --- phi31 ?=- Fourier coefficient φ31
151-160 F10.7 d PerM ? Medium (triple mode) period
162-170 F9.7 d e_PerM ? Uncertainty of the medium period
173-182 F10.5 d T0M ? Time of maximum brightness (HJD-2450000)
185-189 F5.3 mag IampM ? I-band amplitude (maximum-minimum)
192-196 F5.3 --- R21M ? Fourier coefficient R21
198-202 F5.3 --- phi21M ? Fourier coefficient φ21
205-209 F5.3 --- R31M ?=- Fourier coefficient R31
211-215 F5.3 --- phi31M ?=- Fourier coefficient φ31
217-226 F10.7 d PerS ? Shortest (double or triple mode) period
228-236 F9.7 d e_PerS ? Uncertainty of the shortest period
239-248 F10.5 d T0S ? Time of maximum brightness (HJD-2450000)
251-255 F5.3 mag IampS ? I-band amplitude (maximum-minimum)
258-262 F5.3 --- R21S ?=- Fourier coefficient R21
264-268 F5.3 --- phi21S ?=- Fourier coefficient φ21
271-275 F5.3 --- R31S ?=- Fourier coefficient R31
277-281 F5.3 --- phi31S ?=- Fourier coefficient φ31
283-297 A15 --- OGLE-II OGLE-II ID (SMCSCNNNNNNN)
299-303 A5 --- GCVS GCVS ID number (SMC)
305-322 A18 --- ONames Other designation
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Byte-by-byte Description of file: remarks.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- --- [OGLE-SMC-CEP-]
14- 17 I04 --- Star Cepheid ID in the form OGLE-LMC-CEP-NNNN
19- 77 A59 --- Rem Remark
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History:
Copied at ftp://ftp.astrouw.edu.pl/ogle/ogle3/OIII-CVS/smc/cep/
References:
Soszynski et al., Paper I 2008AcA....58..163S 2008AcA....58..163S, Cat. J/AcA/58/163
Soszynski et al., Paper II 2008AcA....58..293S 2008AcA....58..293S, Cat. J/AcA/58/293
Soszynski et al., Paper III 2009AcA....59....1S 2009AcA....59....1S, Cat. J/AcA/59/1
Soszynski et al., Paper IV 2009AcA....59..239S 2009AcA....59..239S, Cat. J/AcA/59/239
Soszynski et al., Paper V 2009AcA....59..335S 2009AcA....59..335S, Cat. J/AcA/59/335
Poleski et al., Paper VI 2010AcA....60....1P 2010AcA....60....1P, Cat. J/AcA/60/1
Soszynski et al., Paper VIII 2010AcA....60...91S 2010AcA....60...91S, Cat. J/AcA/60/91
Soszynski et al., Paper IX 2010AcA....60..165S 2010AcA....60..165S, Cat. J/AcA/60/165
Poleski et al., Paper X 2010AcA....60..179P 2010AcA....60..179P, Cat. J/AcA/60/179
Soszynski et al., Paper XI 2011AcA....61....1S 2011AcA....61....1S, Cat. J/AcA/61/1
Soszynski et al., Paper XII 2011AcA....61..103S 2011AcA....61..103S, Cat. J/AcA/61/103
Soszynski et al., Paper XIII 2011AcA....61..217S 2011AcA....61..217S, Cat. J/AcA/61/217
Soszynski et al., Paper XXIV 2011AcA....61..285S 2011AcA....61..285S, Cat. J/AcA/61/285
(End) Patricia Vannier [CDS] 17-May-2010