J/AJ/139/357 Variable stars in NGC 5286 (Zorotovic+, 2010)
The globular cluster NGC 5286. II. Variable stars.
Zorotovic M., Catelan M., Smith H.A., Pritzl B.J., Aguirre P., Angulo R.E.,
Aravena M., Assef R.J., Contreras C., Cortes C., De Martini G.,
Escobar M.E., Gonzalez D., Jofre P., Lacerna I., Navarro C., Palma O.,
Prieto G.E., Recabarren E., Trivino J., Vidal E.
<Astron. J., 139, 357-371 (2010)>
=2010AJ....139..357Z 2010AJ....139..357Z
ADC_Keywords: Clusters, globular ; Stars, variable ; Photometry, UBV
Keywords: galaxies: dwarf - galaxies: star clusters -
globular clusters: individual (NGC 5286) -
Hertzsprung-Russell diagram - stars: variables: other
Abstract:
We present the results of a search for variable stars in the globular
cluster (GC) NGC 5286, which has recently been suggested to be
associated with the Canis Major dwarf spheroidal galaxy. Fifty-seven
variable stars were detected, only 19 of which had previously been
known. Among our detections one finds 52 RR Lyrae (22 RRc and
30 RRab), 4 long-period variables, and 1 type II Cepheid of the BL
Herculis type. Periods are derived for all of the RR Lyrae as well as
the Cepheid, and BV light curves are provided for all the variables.
Description:
The images used in this paper are the same as described in Paper I
(Zorotovic et al., 2009AJ....137..257Z 2009AJ....137..257Z), constituting a set of 128
frames in V and 133 in B, acquired with the 1.3m Warsaw University
Telescope at Las Campanas Observatory, Chile, in the course of a
one-week run in 2003 April. Further details can be found in Paper I.
In addition, a few images were taken in 2008 February using the 4.1m
Southern Astrophysical Research (SOAR) Telescope, located in Cerro
Pachon Chile, to further check the positions of the variables in the
crowded regions around the cluster center.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 100 57 Photometric parameters for NGC 5286 variables
table2.dat 43 11835 Photometry of the variable stars
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 -- Name Star name (VNN or NVNN)
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 15 F4.1 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 34 F6.4 d Per ?=- Period
36- 39 F4.2 mag Bamp ?=- Amplitude in B band
41- 44 F4.2 mag Vamp ?=- Amplitude in V band
46- 51 F6.3 mag (B)mag ?=- Weighted mean B magnitude (1)
52 A1 --- u_(B)mag Uncertainty flag on (B)mag
54- 59 F6.3 mag (V)mag ?=- Weighted mean V magnitude (1)
60 A1 --- u_(V)mag Uncertainty flag on (V)mag
62- 67 F6.3 mag <Bmag> ?=- Intensity-mean B magnitude (1)
69- 74 F6.3 mag <Vmag> ?=- Intensity-mean V magnitude (1)
76- 80 F5.3 mag (B-V)m ?=- Average B-V colour index
81 A1 --- u_(B-V)m Uncertainty flag on (B-V)m
83- 87 F5.3 mag - ?=- Intensity-mean B-V colour index
89- 93 F5.3 mag (B-V)st ?=- B-V colour index corresponding to the
equivalent static star
95-100 A6 --- VType Star's variability type (RRab, RRc, LPV or
BL Her
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Note (1): corrected for differential redenning.
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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- 4 A4 --- Name Variable name
6 A1 --- Filt [BV] Filter used
8- 21 F14.6 d JD Julian date of observation
23- 28 F6.4 --- Phase Phase
30- 36 F7.4 mag mag Observed magnitude in Filt
38- 43 F6.4 mag e_mag Error in mag
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History:
From electronic version of the journal
References:
Zorotovic et al., Paper I 2009AJ....137..257Z 2009AJ....137..257Z
(End) Patricia Vannier [CDS] 14-May-2012