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J/A+A/597/A10      South Ecliptic Pole stars radial velocities   (Fremat+, 2017)

A test field for Gaia. Radial velocity catalogue of stars in the South Ecliptic Pole. Fremat Y., Altmann M., Pancino E., Soubiran C., Jofre P., Damerdji Y., Heiter U., Royer F., Seabroke G., Sordo R., Blanco-Cuaresma S., Jasniewicz G., Martayan C., Thevenin F., Vallenari A., Blomme R., David M., Gosset E., Katz D., Viala Y., Boudreault S., Cantat-Gaudin T., Lobel A., Meisenheimer K., Nordlander T., Raskin G., Royer P., Zorec J. <Astron. Astrophys. 597, A10 (2017)> =2017A&A...597A..10F (SIMBAD/NED BibCode)
ADC_Keywords: Radial velocities; Effective temperatures ; Abundances, [Fe/H] Keywords: stars: kinematics and dynamics Abstract: We present an initial overview of the targets to be found in the 1-square-degree SEP region that was observed repeatedly by Gaia ever since its commissioning. In our representative sample, we identified one galaxy, six LMC S-stars, nine candidate chromospherically active stars, and confirmed the status of 18 LMC Carbon stars. A careful study of the 3471 epoch radial velocity measurements led us to identify 145 RV constant stars with radial velocities varying by less than 1km/s. Seventy-eight stars show significant RV scatter, while nine stars show a composite spectrum. As expected, the distribution of the RVs exhibits two main peaks that correspond to Galactic and LMC stars. By combining [Fe/H], and logg, estimates, and RV determinations, we identified 203 members of the LMC, while 51 more stars are candidate members. Description: The tables contain a description of the observations we performed with the GIRAFFE and UVES spectrographs of a sample of targets found in the South Ecliptic Pole. Radial velocities and astrophysical parameters were derived, and the variability of the RVs was assessed. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 91 747 BVRI photometry of SEP stars table2.dat 41 51 GIRAFFE observations log table3.dat 85 1249 Characteristics of the closest HERMES spectrum table5.dat 38 747 Stellar parameters of the final best template table7.dat 94 4204 *Epoch radial velocity determinations table8.dat 72 724 Median RV, LMC membership, and variable status refs.dat 137 80 References
Note on table7.dat: Observations with SNR<5 are given for information purposes only, but are not further taken into account in the discussion.
See also: I/337 : Gaia DR1 (Gaia Collaboration, 2016) J/AcA/62/219 : OGLE: Gaia South Ecliptic Pole Field (Soszynski+, 2012) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs) 19- 24 I6 --- EID ID the 1st version of the GEPC 26- 35 F10.6 deg RAdeg Right Ascension (J2000) 37- 46 F10.6 deg DEdeg Declination (J2000) 47- 61 A15 --- OGLE OGLE ID (LMCFFF.FF.NNNN) (1) 63- 67 F5.3 arcsec Dist ? Angular distance between EID and OGLE sources 69- 73 F5.2 mag Bmag ? WFI B magnitude (2) 75- 79 F5.2 mag Vmag ? WFI V magnitude (2) 81- 85 F5.2 mag Rmag ? WFI R magnitude (2) 87- 91 F5.2 mag Imag ? WFI I magnitude (2)
Note (1): from OGLE SEP catalogue of variable stars (Soszynski et al., 2012, Cat. J/AcA/62/219), for matches found within 1 arcsec. Note (2): BVRI photometry obtained in 2007 and 2009 at the ESO-La Silla observatory in Chile with the 2.2-m telescope and the WFI instrument.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- OB Observation Block number 8- 18 F11.5 d MJD Modified Julian date 20- 23 A4 --- Setup Giraffe setup 25 I1 --- Plate Plate number 27- 30 I4 s ExpTime Exposure time 32- 34 A3 --- ObsPer ESO observing period 36- 37 A2 --- Pointing Pointing field (see Fig.1) 39- 41 I3 --- SNR Signal to noise ratio
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 I6 --- EID ID the 1st version of the GEPC 8- 11 A4 --- Setup Giraffe setup 13- 36 A24 --- ID ID of the HERMES star 38- 55 A18 --- SpType Spectral type of closest spectrum 57- 58 I2 --- r_SpType ? Reference for the spectral type (in refs.dat file) (1) 60- 64 I5 K Teff ? Effective temperature of closest spectrum 66- 69 F4.2 [cm/s2] logg ? Surface gravity of closest spectrum 71- 75 F5.2 --- [Fe/H] ? Iron abundance of closest spectrum 77- 78 I2 --- r_Teff ? Reference for the APs (in refs.dat file) (1) 80- 82 I3 km/s vsini ? vsin(i) of the closest spectrum 84- 85 I2 --- r_vsini ? Reference for the vsini (in refs.dat file) (1)
Note (1): When no literature reference is provided for the spectral type, the classification is the one found in the basic information in the Simbad database (CDS), while the same situation for the astrophysical parameters means that the values were estimated using the available Stroemgren photometry as well as the Moon & Dworetsky (1985MNRAS.217..305M) calibration updated by Napiwotzki (1997, priv. comm.).
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 6 I6 --- EID ID the 1st version of the GEPC 8- 12 I5 K Teff ? Effective temperature 14- 16 F3.1 [cm/s2] logg ? Surface gravity 18- 22 F5.2 --- [Fe/H] ? Iron abundance 24- 27 F4.2 --- [alpha/Fe] ? Relative abundance of alpha elements 29- 31 I3 km/s vsini ? Projected rotational velocity 33- 38 A6 --- Com Comments (C STAR or GALAXY)
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 6 I6 --- EID ID the 1st version of the GEPC 8- 11 A4 --- Setup Giraffe setup 13- 15 I3 --- SNR Signal to noise ratio 17- 27 F11.5 d HJD Heliocentric Julian date 29- 35 F7.2 km/s RVISPEC ? ISPEC de-trended barycentric RV 37- 42 F6.2 km/s e_RVISPEC ? rms uncertainty on RVISPEC 44- 50 F7.2 km/s RVPCOR ? PCOR de-trended barycentric RV 52- 57 F6.2 km/s e_RVPCOR ? rms uncertainty on RVPCOR 59- 65 F7.2 km/s RVDAOSPEC ? DAOSPEC de-trended barycentric RV 67- 71 F5.2 km/s e_RVDAOSPEC ? rms uncertainty on RVDAOSPEC 73- 79 F7.2 km/s RV Weighted mean 81- 86 F6.2 km/s e_RV Corresponding error bar 88- 94 A7 --- Rem Comment on SNR/type of star
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 6 I6 --- EID ID the 1st version of the GEPC 8- 13 F6.2 km/s RV ? Median radial velocity 15- 18 F4.2 km/s e_RV ? Error on RV 20- 21 I2 --- o_RV Total number of individual measurements used to compute the median 23- 24 I2 --- Nep Number of epochs 26- 31 F6.2 d TimeSpan Time span of the observations 33- 53 A21 --- Rem Remarks (1) 55- 60 F6.2 d Per ? OGLE variation period (2) 62- 72 A11 --- Vflag OGLE variability flag (2)
Note (1): Labels as follows: LMC = bona fide LMC member LMC? = possible LMC member VAR = RV variable VAR? = possible RV variable RV-REF = target with constant RV over the time span RV-REF? = possibly constant in RV CaII K em. = shows emission in the CaII K line CaII T em. = shows emission in the CaII triplet HI em. = shows emission in the Paschen lines Note (2): For the stars found to have variable photometry by OGLE, we further give in the last columns the corresponding period of photometric variation and the OGLE variability flags (Soszynski et al., 2012, Cat. J/AcA/62/219).
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference code 4- 22 A19 --- BibCode BibCode 24- 50 A27 --- Aut Author's name 52-137 A86 --- Com Comments
Acknowledgements: Yves Fremat, yves.fremat(at) History: * 20-Dec-2016 : On-line version * 19-Sep-2017 : table3 corrected (from author)
(End) Patricia Vannier [CDS] 04-Oct-2016
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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