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 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:
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FileName Lrecl Records Explanations
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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
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Note on table7.dat: Observations with SNR<5 are given for information purposes
only, but are not further taken into account in the discussion.
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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
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Bytes Format Units Label Explanations
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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)
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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.
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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- 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
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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- 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)
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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 1985MNRAS.217..305M) calibration updated by
Napiwotzki (1997, priv. comm.).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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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)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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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)
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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).
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 50 A27 --- Aut Author's name
52-137 A86 --- Com Comments
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Acknowledgements:
Yves Fremat, yves.fremat(at)observatory.be
History:
* 20-Dec-2016 : On-line version
* 19-Sep-2017 : table3 corrected (from author)
(End) Patricia Vannier [CDS] 04-Oct-2016