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J/A+A/609/A53     Tracing stars of MW dwarf galaxies: Sextans (Cicuendez+, 2018)

Tracing the stellar component of low surface brightness Milky Way dwarf galaxies to their outskirts. I: Sextans. Cicuendez L., Battaglia G., Irwin M., Bermejo-Climent J.R., McMonigal B., Bate N.F., Lewis G.F., Conn A.R., de Boer T.J.L., Gallart C., Guglielmo M., Ibata R., McConnachie A., Tolstoy E., Fernando N. <Astron. Astrophys. 609, A53 (2018)> =2018A&A...609A..53C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Galaxies, photometry ; Photographic catalog ; Spectroscopy ; Radial velocities ; Abundances, [Fe/H] ; Equivalent widths Keywords: galaxies: individual: Sextans dSph - galaxies: dwarf - Local Group - galaxies: structure - galaxies: statistics - dark matter Abstract: We present a deep and very spatially extended CTIO/DECam g and r photometric catalogue of point-sources (reaching out to ∼2 magnitudes below the oldest main-sequence turn-off and covering ∼20deg2) around the Sextans dwarf spheroidal galaxy, together with another catalogue of literature spectroscopic measurements (Walker et al., 2009, Cat. J/AJ/137/3100 and Battaglia et al., 2011, Cat. J/MNRAS/411/1013) with updated membership probabilities. Description: The observations took place between March 18 and 23 2015 in visitor mode with the instrument DECam on the 4m Blanco telescope at the CTIO (PI: B. McMonigal). DECam is a widefield CCD imager containing 62 2048x4096 pixel CCDs, producing images with a field of view of 2.2-degrees at 0.263-arcsecond/pixel resolution. We refer the reader to the associated manuscript for the complete description of the observations, data reduction, target selection and assigned membership probabilities. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 72 602019 CTIO/DECam g and r photometric Data table6.dat 131 1595 MMFS + VLT/FLAMES spectroscopic data
See also: J/AJ/137/3100 : Radial velocities of 4 dSph galaxies (Walker+, 2009) J/MNRAS/411/1013 : CaII triplet in Sextans dSph galaxy (Battaglia+, 2011) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- Seq [1/602019] Sequential number 8- 9 I2 h RAh Right ascension (J2000) 11- 12 I2 min RAm Right ascension (J2000) 14- 20 F7.4 s RAs Right ascension (J2000) 22 A1 --- DE- Declination sign (J2000) 23 I1 deg DEd Declination (J2000) 25- 26 I2 arcmin DEm Declination (J2000) 28- 33 F6.3 arcsec DEs Declination (J2000) 35- 40 F6.3 mag gmag Apparent g band magnitude in SDSS system 42- 46 F5.3 mag e_gmag Uncertainty in gmag 48- 49 I2 --- f_gmag [-3/-1] Morphological classification flag in g band (1) 51- 56 F6.3 mag rmag Apparent r band magnitude in SDSS system 58- 62 F5.3 mag e_rmag Uncertainty in rmag 64- 65 I2 --- f_rmag [-3/-1] Morphological classification flag in r band (1) 67- 72 F6.4 mag E(B-V) Reddening
Note (1): Flags as follow: -1 = almost certain star -2 = probable star -3 = star/compact galaxy
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq [1/1595] Sequential number 6- 7 I2 h RAh Right ascension (J2000) 9- 10 I2 min RAm Right ascension (J2000) 12- 16 F5.2 s RAs Right ascension (J2000) 18 A1 --- DE- Declination sign 19 I1 deg DEd Declination (J2000) 21- 22 I2 arcmin DEm Declination (J2000) 24- 27 F4.1 arcsec DEs Declination (J2000) 29- 34 F6.2 km/s HVB11 ? Heliocentric radial velocity in Battaglia et al., 2011, J/MNRAS/411/1013 36- 39 F4.2 km/s e_HVB11 ? Uncertainty in HVB11 41- 46 F6.3 0.1nm EWMg ? Equivalent width of the MgI line 48- 55 F8.6 0.1nm e_EWMg ? Uncertainty in EWMg 57- 65 F9.6 0.1nm [Fe/H] ? Metallicity (1) 67- 74 F8.6 0.1nm e_[Fe/H] ? Error in [Fe/H] (lower value) 76- 83 F8.6 0.1nm E_[Fe/H] ? Error in [Fe/H] (upper value) 85 I1 --- MmbOB11 ? Probability membership in Battaglia et al., 2011, J/MNRAS/411/1013 87- 94 F8.6 --- MmbNB11 ? Probability membership using HVB11, EWMg, [Fe/H] 96-101 F6.1 km/s HVW09 ? Heliocentric radial velocity in Walker et al., 2009, J/AJ/137/3100 103-105 F3.1 km/s e_HVW09 ? Uncertainty in HVW09 107-111 F5.2 0.1nm SigMg ? The ΣMg spectral index 113-116 F4.2 0.1nm e_SigMg ? Uncertainty in SigMg 118-122 F5.3 --- MmbOW09 ? Probability membership in Walker et al., 2009, J/AJ/137/3100 124-131 F8.6 --- MmbNW09 ? Probability membership using HVW09, SigMg
Note (1): derived adopting the calibration from Starkenburg et al. (2010A&A...513A..34S)
Acknowledgements: Luis Cicuendez, cicuendez.salazar(at)gmail.com
(End) Patricia Vannier [CDS] 19-Sep-2017
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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