J/AcA/68/89 VI light curves of MC type II Cepheids (Soszynski+, 2018)
The OGLE Collection of Variable Stars.
Type II Cepheids in the Magellanic System.
Soszynski I., Udalski A., Szymanski M.K., Wyrzykowski L., Ulaczyk K.,
Poleski R., Pietrukowicz P., Kozlowski S., Skowron D., Skowron J., Mroz P.,
Rybicki K., Iwanek P.
<Acta Astron., 68, 89-109 (2018)>
=2018AcA....68...89S 2018AcA....68...89S (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Magnitudes
Keywords: stars: variables: Cepheids - stars: oscillations -
stars: Population II - Magellanic Clouds - catalogs
Abstract:
We present a nearly complete collection of type II Cepheids in the
Magellanic System. The sample consists of 338 objects: 285 and 53
variables in the Large and Small Magellanic Clouds, respectively.
Based on the pulsation periods and light-curve morphology, we
classified 118 of our type II Cepheids as BL Her, 120 as W Vir, 34 as
peculiar W Vir, and 66 as RV Tau stars. For all objects, we publish
time-series VI photometry obtained during the OGLE-IV survey, from
2010 to the end of 2017.
We present the most interesting individual objects in our collection:
16 type II Cepheids showing additional eclipsing or ellipsoidal
variability, two RV Tau variables more than 2.5mag fainter than other
stars of this type in the LMC, an RVb star that drastically decreased
the amplitude of the long-period modulation, type II Cepheids
exhibiting significant amplitude and period changes, and an RV Tau
star which undergoes interchanges of deep and shallow minima. We show
that peculiar W Vir stars have markedly different spatial distribution
than other subclasses of type II Cepheids, which indicates different
evolutionary histories of these objects.
Description:
The OGLE-IV observations have been acquired using the 1.3-m Warsaw
telescope at Las Campanas Observatory, Chile, which is operated by the
Carnegie Institution for Science.
Type II Cepheids in the Magellanic Clouds were extracted from the
OGLE-IV photometric database.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
smcident.dat 108 53 Identification of SMC stars
smct2cep.dat 100 53 Parameters of SMC type II Cepheids
smcrem.dat 97 11 Individual remarks on SMC stars
lmcident.dat 121 290 Identification of LMC stars
lmct2cep.dat 100 290 Parameters of SMC type II Cepheids
lmcrem.dat 123 33 Individual remarks on LMC stars
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See also:
J/AcA/49/543 : OGLE LMC + SMC Cepheids VI photometry (Pietrzynski+, 1999)
J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)
J/AcA/58/293 : Type-II and anomalous Cepheids in LMC (Soszynski+, 2008)
J/AcA/58/313 : LMC Cepheids in OGLE and MACHO data (Poleski+, 2008)
J/AcA/60/17 : VI light curves of SMC classical Cepheids (Soszynski+, 2010)
J/AcA/60/91 : VI light curves of SMC type II Cepheids (Soszynski+, 2010)
J/AcA/65/233 : OGLE Magellanic Clouds anomalous Cepheids (Soszynski+, 2015)
J/AcA/65/297 : OGLE4 LMC and SMC Cepheids (Soszynski+, 2015)
J/ApJ/824/74 : OGLE LC classification of MC Cepheids (Garcia-Varela+, 2016)
Byte-by-byte Description of file: smcident.dat lmcident.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Star Star name, OGLE-SMC-T2CEP-NN (No 1-54) or
OGLE-LMC-T2CEP-NNN (No 1-294)
21- 25 A5 --- Type Subtype of type II Cepheids
(BLHer, RVTau, WVir or pWVir) (1)
28- 29 I2 h RAh Right ascension, equinox J2000.0
31- 32 I2 min RAm Right ascension, equinox J2000.0
34- 38 F5.2 s RAs Right ascension, equinox J2000.0
40 A1 --- DE- Declination sign , equinox J2000.0
41- 42 I2 deg DEd Declination, equinox J2000.0
44- 45 I2 arcmin DEm Declination, equinox J2000.0
47- 50 F4.1 arcsec DEs Declination, equinox J2000.0
53- 68 A16 --- OGLE4 OGLE-IV ID (SMCNNN.NN.NNNNN)
70- 84 A15 --- OGLE3 OGLE-III ID (SMCNNN.NN.NNNNN)
86-100 A15 --- OGLE2 OGLE-II ID (SMCSCNNNNNNN)
102-121 A20 --- OName Other designation (from GCVS)
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Note (1): "pWVir" are peculiar W Vir stars.
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Byte-by-byte Description of file: smct2cep.dat lmct2cep.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Star Star name, OGLE-SMC-T2CEP-NN (No 1-54) or
OGLE-LMC-T2CEP-NNN (No 1-294)
21- 26 F6.3 mag <Imag> Intensity mean I-band magnitude
28- 33 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
36- 45 F10.7 d Per Period
47- 55 F9.7 d e_Per Uncertainty of period
58- 67 F10.5 d T0 Time of maximum brightness (HJD-2450000)
70- 74 F5.3 mag IAmp I-band amplitude (maximum-minimum)
77- 81 F5.3 --- R21 Fourier coefficient R_21
83- 87 F5.3 --- phi21 ?=- Fourier coefficient phi_21
90- 94 F5.3 --- R31 Fourier coefficient R_31
96-100 F5.3 --- phi31 ?=- Fourier coefficient phi_31
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Byte-by-byte Description of file: smcrem.dat lmcrem.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Star Star name, OGLE-SMC-T2CEP-NN (No 1-54) or
OGLE-LMC-T2CEP-NNN (No 1-294)
20-123 A104 ---- Rem Remark
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History:
Copied at ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/smc/t2cep/
and ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/lmc/t2cep/
References:
Soszynski et al., 2015AcA....65..233S 2015AcA....65..233S, Cat. J/AcA/65/233
Soszynski et al., 2015AcA....65..297S 2015AcA....65..297S, Cat. J/AcA/65/297
Soszynski et al., 2016AcA....66..131S 2016AcA....66..131S, Cat. J/AcA/66/131
Sitek et al., 2016AcA....66..255S 2016AcA....66..255S
Soszynski et al., 2016AcA....66..405S 2016AcA....66..405S, Cat. J/AcA/66/405
PAWLAK et al., 2016AcA....66..421P 2016AcA....66..421P, Cat. J/AcA/66/421
Soszynski et al., 2017AcA....67..103S 2017AcA....67..103S, Cat. J/AcA/67/103
Soszynski et al., 2017AcA....67..297S 2017AcA....67..297S, Cat. J/AcA/67/297
Sitek et al., 2017AcA....67..363S 2017AcA....67..363S
Udalski et al., 2018AcA....68..315U 2018AcA....68..315U
Soszynski et al., 2019AcA....69...87S 2019AcA....69...87S
History:
30-Sep-2019: smc data
09-Jun-2020: lmc data added, version 04/07/2019
(End) Patricia Vannier [CDS] 19-Sep-2019