J/AJ/145/160 Variables in LMC globular clusters. III. Reticulum (Kuehn+, 2013)
Variable stars in large Magellanic cloud globular clusters. III. Reticulum.
Kuehn C.A., Dame K., Smith H.A., Catelan M., Jeon Y.-B., Nemec J.M.,
Walker A.R., Kunder A., Pritzl B.J., De Lee N., Borissova J.
<Astron. J., 145, 160 (2013)>
=2013AJ....145..160K 2013AJ....145..160K
ADC_Keywords: Magellanic Clouds ; Clusters, globular ; Stars, variable ;
Photometry, UBVRI
Keywords: Magellanic Clouds - stars: horizontal-branch -
stars: variables: general - stars: variables: RR Lyrae
Abstract:
This is the third in a series of papers studying the variable stars in
old globular clusters in the Large Magellanic Cloud. The primary goal
of this series is to look at how the characteristics and behavior of
RR Lyrae stars in Oosterhoff-intermediate systems compare to those of
their counterparts in Oosterhoff-I/II systems. In this paper we
present the results of our new time-series BVI photometric study of
the globular cluster Reticulum. We found a total of 32 variables stars
(22 RRab, 4 RRc, and 6 RRd stars) in our field of view. We present
photometric parameters and light curves for these stars. We also
present physical properties, derived from Fourier analysis of light
curves, for some of the RR Lyrae stars. We discuss the Oosterhoff
classification of Reticulum and use our results to re-derive the
distance modulus and age of the cluster.
Description:
A total of 38V, 33B, and 35I images were obtained using the SOI imager
(5.2*5.2arcmin field of view) on the SOAR 4m telescope in February of
2008. ANDICAM (6*6arcmin field of view) on the SMARTS 1.3m telescope
operated by the SMARTS consortium was used to obtain 45V, 43B, and 45I
images between 2006 September and the end of 2006 December. An
additional 145V and 146B image were taken with the Tek2K
(13.6*13.6arcmin field of view) on the SMARTS 0.9m telescope between
2008 December and 2009 November.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 89 26 Photometric parameters for the RRab and RRc
variables in Reticulum
table2.dat 110 6 Photometric parameters for the RRd variables in
Reticulum
table3.dat 44 16339 Photometry of the variable stars
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See also:
J/AJ/144/186 : Variables in LMC globular clusters. II. NGC 1786 (Kuehn+, 2012)
J/AJ/142/107 : Variable stars in NGC 1466 (Kuehn+, 2011)
J/AJ/139/357 : Variable stars in NGC 5286 (Zorotovic+, 2010)
J/AJ/129/267 : RR Lyrae variables in NGC 5272 (Cacciari+, 2005)
J/AcA/53/93 : OGLE RR Lyrae in LMC (Soszynski+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [V]
2- 3 I2 --- Vno [1/31] Variable number
4- 5 A2 --- f_Vno [BL] Potential Blazhko effect
7- 8 I2 h RAh Hour of Right Ascension (J2000)
10- 11 I2 min RAm Minute of Right Ascension (J2000)
13- 16 F4.1 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- Sign of the Declination
19- 20 I2 deg DEd Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30- 33 A4 --- Type Variable type (RRab or RRc)
35- 41 F7.5 d Per Period
43- 46 F4.2 mag Vamp V band amplitude
48- 51 F4.2 mag Bamp B band amplitude
53- 56 F4.2 mag Iamp I band amplitude
58- 63 F6.3 mag <Vmag> Intensity-weighted V-band mean magnitude
65- 70 F6.3 mag <Bmag> Intensity-weighted B-band mean magnitude
72- 77 F6.3 mag <Imag> Intensity-weighted I-band mean magnitude
79- 83 F5.3 mag <B-V> Magnitude-weighted mean B-V color index
85- 86 A2 --- --- [DK]
87- 89 I3 --- DK [7/181] Star number in Demers & Kunkel
(1976ApJ...208..932D 1976ApJ...208..932D
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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 A1 --- --- [V]
2- 3 I2 --- Vno [3/32] Variable number
5- 6 I2 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 14 F4.1 s RAs Second of Right Ascension (J2000)
16 A1 --- DE- Sign of the Declination
17- 18 I2 deg DEd Degree of Declination (J2000)
20- 21 I2 arcmin DEm Arcminute of Declination (J2000)
23- 26 F4.1 arcsec DEs Arcsecond of Declination (J2000)
28- 33 F6.4 d P0 Fundamental period
35- 40 F6.4 d P1 First overtone period
42- 47 F6.4 --- P1/P0 First overtone to fundamental period ratio
49- 52 F4.2 mag Vamp0 Fundamental V-band amplitude
54- 57 F4.2 mag Vamp1 First overtone V-band amplitude
59- 62 F4.2 mag Bamp0 Fundamental B-band amplitude
64- 67 F4.2 mag Bamp1 First overtone B-band amplitude
69- 72 F4.2 mag Iamp0 Fundamental I-band amplitude
74- 77 F4.2 mag Iamp1 First overtone I-band amplitude
79- 84 F6.3 mag <Vmag> V-band mean magnitude
86- 91 F6.3 mag <Bmag> B-band mean magnitude
93- 98 F6.3 mag <Imag> I-band mean magnitude
100-104 F5.3 mag <B-V> Mean B-V color index
106-107 A2 --- --- [DK]
108-110 I3 --- DK [4/157] Star number in Demers & Kunkel
(1976ApJ...208..932D 1976ApJ...208..932D)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [V]
2- 3 I2 --- Vno [1/32] Variable number
5 A1 --- Flt [BVI] Filter used in the observation (B, V, I)
7- 18 F12.4 d HJD Heliocentric Julian Date of observation
20- 26 F7.5 -- Phase [0/1] Phase (1)
28- 33 F6.3 mag mag [17.878/21.028] Magnitude in Flt
35- 39 F5.3 mag e_mag Error in mag
41- 44 A4 --- Tel Telescope used (0.9m, 1.3m, SOAR) (2)
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Note (1): Computed such that maximum light occurs at phase 0.
Note (2): Telescope as follows:
SOAR = Southern Astrophysical Research 4m telescope;
0.9m = SMARTS (Small & Moderate Aperture Research Telescope System) 0.9m
telescope;
1.3m = SMARTS 1.3m telescope.
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History:
From electronic version of the journal
References:
Kuehn et al., Paper I, 2011AJ....142..107K 2011AJ....142..107K, Cat. J/AJ/142/107
Kuehn et al., Paper II, 2012AJ....144..186K 2012AJ....144..186K, Cat. J/AJ/144/186
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 02-Jun-2014