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J/A+A/598/A5           Gaia-ESO Survey iDR4 calibrators         (Pancino+, 2017)

The Gaia-ESO Survey: calibration strategy. Pancino E., Lardo C., Altavilla G., Marinoni S., Ragaini S., Cocozza G., Bellazzini M., Sabbi E., Zoccali M., Donati P., Heiter U., Koposov S.E., Blomme R., Morel T., Simon-Diaz S., Lobel A., Soubiran C., Montalban J., Valentini M., Casey A.R., Blanco-Cuaresma S., Jofre P., Worley C.C., Magrini L., Hourihane A., Francois P., Feltzing S., Gilmore G., Randich S., Asplund M., Bonifacio P., Drew J.E., Jeffries R.D., Micela G., Vallenari A., Alfaro E.J., Allende Prieto C., Babusiaux C., Bensby T., Bragaglia A., Flaccomio E., Hambly N., Korn A.J., Lanzafame A.C., Smiljanic R., Van Eck S., Walton N.A., Bayo A., Carraro G., Costado M.T., Damiani F., Edvardsson B., Franciosini E., Frasca A., Lewis J., Monaco L., Morbidelli L., Prisinzano L., Sacco G.G., Sbordone L., Sousa S.G., Zaggia S., Koch A. (Gaia-ESO collaboration) <Astron. Astrophys. 598, A5 (2017)> =2017A&A...598A...5P (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Abundances ; Radial velocities Keywords: surveys - Galaxy: general - stars: abundances - techniques: spectroscopic - techniques: radial velocities Abstract: The Gaia-ESO survey (GES) is now in its fifth and last year of observations and has produced tens of thousands of high-quality spectra of stars in all Milky Way components. This paper presents the strategy behind the selection of astrophysical calibration targets, ensuring that all GES results on radial velocities, atmospheric parameters, and chemical abundance ratios will be both internally consistent and easily comparable with other literature results, especially from other large spectroscopic surveys and from Gaia. The calibration of GES is particularly delicate because of (i) the large space of parameters covered by its targets, ranging from dwarfs to giants, from O to M stars; these targets have a large wide of metallicities and also include fast rotators, emission line objects, and stars affected by veiling; (ii) the variety of observing setups, with different wavelength ranges and resolution; and (iii) the choice of analyzing the data with many different state-of-the-art methods, each stronger in a different region of the parameter space, which ensures a better understanding of systematic uncertainties. An overview of the GES calibration and homogenization strategy is also given, along with some examples of the usage and results of calibrators in GES iDR4, which is the fourth internal GES data release and will form the basis of the next GES public data release. The agreement between GES iDR4 recommended values and reference values for the calibrating objects are very satisfactory. The average offsets and spreads are generally compatible with the GES measurement errors, which in iDR4 data already meet the requirements set by the main GES scientific goals. Description: List of GES iDR4 calibrators. It can be used to select the iDR4 calibrators from the upcoming ESO Phase 3 public release. The columns contain: the GES unique identifier of each star (the CName), based on the object sexagesimal coordinates; the calibration type, which can be GC or OC for clusters, RV for radial velocity standards, BM for benchmark stars, or CR for CoRoT targets; the field name; and the 2MASS J and K magnitudes, when available. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 48 1970 List of GES iDR4 calibrators
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 16 A16 --- CName Unique GES iDR4 target name, based on object coordinates (HHMMSSss+DDMMSSs) (1) 19- 20 A2 --- Type Calibrator type (2) 23- 34 A12 --- Field Field or object name 36- 41 F6.2 mag Jmag ?=-9.99 J magnitude from 2MASS (3) 43- 48 F6.2 mag Kmag ?=-9.99 K magnitude from 2MASS (3)
Note (1): No CName for the Sun. Note (2): Calibrator type has follows: CR = CoRoT targets GC = Globular cluster star OC = Open cluster star RV = Radial velocity standard star BM = Gaia benchmark star Note (3): The 2MASS magnitude is not available for all calibrators.
Acknowledgements: Elena Pancino, pancino(at)arcetri.inaf.it
(End) Elena Pancino [INAF-OAA, Italy], Patricia Vannier [CDS] 08-Nov-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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