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J/MNRAS/462/4349    Variable stars in Sculptor dSph    (Martinez-Vazquez+, 2016)

Variable stars in Local Group Galaxies. II. Sculptor dSph. Martinez-vazquez C.E., Stetson P.B., Monelli M., Bernard E.J., Fiorentino G., Gallart C., Bono G., Cassisi S., Dall'Ora M., Ferraro I., Iannicola G., Walker A.R. <Mon. Not. R. Astron. Soc., 462, 4349-4370 (2016)> =2016MNRAS.462.4349M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Stars, variable ; Photometry, UBVRI Keywords: stars: variables: general - galaxies: evolution - galaxies: individual: Sculptor dSph - Local Group - galaxies: stellar content Abstract: We present the identification of 634 variable stars in the Milky Way dwarf spheroidal (dSph) satellite Sculptor based on archival ground-based optical observations spanning ∼24yr and covering ∼2.5deg2. We employed the same methodologies as the 'Homogeneous Photometry' series published by Stetson. In particular, we have identified and characterized one of the largest (536) RR Lyrae samples so far in a Milky Way dSph satellite. We have also detected four Anomalous Cepheids, 23 SX Phoenicis stars, five eclipsing binaries, three field variable stars, three peculiar variable stars located above the horizontal branch - near to the locus of BL Herculis - that we are unable to classify properly. Additionally, we identify 37 long period variables plus 23 probable variable stars, for which the current data do not allow us to determine the period. We report positions and finding charts for all the variable stars, and basic properties (period, amplitude, mean magnitude) and light curves for 574 of them. We discuss the properties of the RR Lyrae stars in the Bailey diagram, which supports the coexistence of subpopulations with different chemical compositions. We estimate the mean mass of Anomalous Cepheids (∼1.5M) and SX Phoenicis stars (∼1M). We discuss in detail the nature of the former. The connections between the properties of the different families of variable stars are discussed in the context of the star formation history of the Sculptor dSph galaxy. Description: The photometric data set used for this study consists of 5149 individual CCD images obtained during 21 observing runs between 1987 October and 2011 August (i.e. over nearly 24yr). It covers an area over the sky of ∼4.7deg2 centred on the Sculptor dSph galaxy. However, only 4404 images (within ∼2.5deg2) were calibrated photometrically, while the area with a significant number of epochs for the variability study is further reduced to ∼2.0deg2. These data were acquired with a variety of cameras on a number of different telescopes at the European Southern Observatory, Cerro Tololo Interamerican Observatory, and Las Campanas Observatory . File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 192 536 Parameters of the RRL stars in Sculptor dSph table6.dat 192 4 Parameters of the AC stars in Sculptor dSph table8.dat 192 23 Parameters of the SX Phe in Sculptor dSph table9.dat 192 3 Parameters of the three peculiar variable stars in Sculptor dSph table10.dat 192 5 Parameters of the eclipsing binary stars in in Sculptor dSph table11.dat 192 3 Parameters of the field variable star found in in Sculptor dSph table12.dat 126 60 Parameters of the candidates variable stars with problems of classification in Sculptor dSph table13.dat 112 29 Parameters of non-variable stars in Sculptor dSph table2.dat 85 51927 Photometry of the variable stars in Sculptor dSph
See also: J/A+AS/112/407 : Variable Stars in the Sculptor dwarf galaxy (Kaluzny+, 1995) J/ApJ/842/60 : Variable stars in Logal Group galaxies. III. (Monelli+, 2017) Byte-by-byte Description of file: table[4689].dat table1[01].dat
Bytes Format Units Label Explanations
1- 11 A11 --- Star Star name (scl-CEMVNNN) 12 A1 --- n_Star [a] Note on Star 14- 18 A5 --- Name Original name (G1) 21- 25 A5 --- AName Alternative name (G1) 27- 28 I2 h RAh Right ascension (J2000) 30- 31 I2 min RAm Right ascension (J2000) 33- 37 F5.2 s RAs Right ascension (J2000) 39 A1 --- DE- Declination sign (J2000) 40- 41 I2 deg DEd Declination (J2000) 43- 44 I2 arcmin DEm Declination (J2000) 46- 49 F4.1 arcsec DEs Declination (J2000) 51- 60 F10.8 d Per Period 61- 62 A2 --- u_Per [: ] Uncertainty flag on Per 64- 69 F6.3 mag <Bmag> Mean B magnitude 71- 76 F6.3 mag <Vmag> Mean V magnitude 78- 83 F6.3 mag <Imag> Mean I magnitude 85- 89 F5.3 mag AB Absorption in B band 91- 95 F5.3 mag AV Absorption in V band 97-101 F5.3 mag AI Absorption in I band 103 A1 --- Q1 [0-5] Quality flag for light curve (G2) 105 A1 --- Q2 [0-1] Quality flag for light curve coverage (G3) 107-110 A4 --- Type RR type 112-192 A81 --- Note Notes
Byte-by-byte Description of file: table12.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Star Star name (scl-CEMVNNN) 14- 18 A5 --- Name Original name (G1) 21- 25 A5 --- AName Alternative name (G1) 27- 28 I2 h RAh Right ascension (J2000) 30- 31 I2 min RAm Right ascension (J2000) 33- 37 F5.2 s RAs Right ascension (J2000) 39 A1 --- DE- Declination sign (J2000) 40- 41 I2 deg DEd Declination (J2000) 43- 44 I2 arcmin DEm Declination (J2000) 46- 49 F4.1 arcsec DEs Declination (J2000) 51-126 A76 --- Note Notes
Byte-by-byte Description of file: table13.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Name Original name (G1) 7- 11 A5 --- AName Alternative name (G1) 13- 14 I2 h RAh Right ascension (J2000) 16- 17 I2 min RAm Right ascension (J2000) 19- 23 F5.2 s RAs Right ascension (J2000) 25 A1 --- DE- Declination sign (J2000) 26- 27 I2 deg DEd Declination (J2000) 29- 30 I2 arcmin DEm Declination (J2000) 32- 35 F4.1 arcsec DEs Declination (J2000) 37-112 A76 --- Note Notes
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Star Star name (scl-CEMVNNN) 13- 22 F10.4 d MHJDB ? Modified Julian date for B band (1) 24- 29 F6.3 mag Bmag ? B magnitude 31- 35 F5.3 mag e_Bmag ? rms uncertainty on Bmag 38- 47 F10.4 d MHJDV ? Modified Julian date for V band (1) 49- 54 F6.3 mag Vmag ? V magnitude 56- 60 F5.3 mag e_Vmag ? rms uncertainty on Vmag 63- 72 F10.4 d MHJDI ? Modified Julian date for I band (1) 74- 79 F6.3 mag Imag ? I magnitude 81- 85 F5.3 mag e_Imag ? rms uncertainty on Imag
Note (1): Modified Heliocentric Julian Date of mid-exposure: HJD-2400000.
Global notes: Note (G1): VNNN from van Agt (1978PDDO....3..205V), [V78] NNN in Simbad, KNNN form Kaluzny et al. (1995, Cat. J/A+AS/112/407), OGLE Scl NNNN in Simbad. Note (G2): Flag associated with quality of the light curve as follows: 0 = good 1 = poor quality 2 = noisy 3 = outliers 4 = blended 5 = Blazhko effect Note (G3): Flag related with the coverage of the light curve as follows: 0 = not well sampled and/or too noisy 1 = well sampled and not too noisy
History: From electronic version of the journal References: Martinez-Vazquez et al., Paper I 2015MNRAS.454.1509M Monelli et al., Paper III 2017ApJ...842...60M, Cat. J/ApJ/842/60
(End) Patricia Vannier [CDS] 25-Apr-2018
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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