B/polarbase PolarBase spectropolarimetric database (ESPaDOnS, NARVAL) (Petit+, 2014)
PolarBase - A Database of High-Resolution Spectropolarimetric Stellar
Observations
Petit P., Paletou F., Mathias P., Glorian JM., Amato A.
<Publ. Astron. Soc. Pac. 126, 469 (2014)>
=2014PASP..126..469P 2014PASP..126..469P
ADC_Keywords: Stars, early-type ; Stars, late-type ; Line Profiles ;
Magnetic fields ; Polarization ; Spectroscopy
Keywords: Astronomical databases: miscellaneous - Stars: general
Abstract:
PolarBase is an evolving data base that contains all stellar data collected
with the ESPaDOnS and NARVAL high-resolution spectropolarimeters, in their
reduced form, as soon as they become public. As of early 2014, observations of
2,000 stellar objects throughout the Hertzsprung-Russell diagram are
available. Intensity spectra are available for all targets, and the majority
of the observations also include simultaneous spectra in circular or linear
polarization, with the majority of the polarimetric measurements being
performed only in circularly polarized light (Stokes V). Observations are
associated with a cross-correlation pseudo-line profile in all available
Stokes parameters, greatly increasing the detectability of weak polarized
signatures. Stokes V signatures are detected for more than 300 stars of all
masses and evolutionary stages, and linear polarization is detected in 35
targets. The detection rate in Stokes V is found to be anti-correlated with
the stellar effective temperature. This unique set of Zeeman detections offers
the first opportunity to run homogeneous magnetometry studies throughout the
H-R diagram. The web interface of PolarBase is available at
http://polarbase.irap.omp.eu.
Description:
We list the stellar spectroscopic and spectropolarimetric observations
available in the PolarBase data base. For each star equatorial
coordinates, first Julian date of observation, last Julian date of
observation, number of observations are given, and a detection
diagnosis of polarized signatures (in cross-correlated pseudo-line
profiles) are given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . this file
polarbase.dat 651 438818 Polarbase database (IRAP)
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Byte-by-byte Description of file: polarbase.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID Key to indentify a spectrum (id_spectrum)
8- 39 A32 --- Object Object's Name (object)
41- 50 F10.6 deg RAdeg Right ascension (ICRS) (ra)
52- 63 F12.8 deg DEdeg Declination (ICRS) (dec)
65- 96 A32 --- SpType Object spectral type (spectype)
98-105 F8.4 mag Vmag ? V Magnitude (magnitude)
107-114 F8.1 K Teff ? Effective Temperature (teffective)
116-134 A19 --- r_Teff Effective Temperature Bibcode
(ref_teffective)
136-142 F7.4 --- logg ? Logarithm of the surface gravity (logg)
144-162 A19 --- r_logg Logarithm of the surface gravity Bibcode
164-169 F6.3 --- [Fe/H] ? Metallicity (feh)
171-189 A19 --- r_[Fe/H] Metallicity Bibcode (ref_feh)
191-198 F8.3 --- vrot ? Stellar Rotational Velocities (rot)
200-218 A19 --- r_vrot Stellar Rotational Velocities Bibcode
(r_rot)
220-230 F11.4 pc Dist ? Distance value (distance)
232-250 A19 --- r_Dist Distance value Bibcode (ref_distance)
252-259 F8.1 km/s RV ? Radial Velocity (radvel)
261-279 A19 --- r_RV ? Radial Velocity Bibcode (r_radvel)
281-312 A32 --- type Object's type (Simbad Classification)
314-377 A64 --- subtype Object's subtype (Simbad Classification)
379-397 A19 "datime" Date Observation's ISO date (date)
399-407 A9 --- Inst Instrument's Name (instrument)
409-413 A5 --- n_Inst Observation Mode (mode_instrument)
415-421 F7.3 h HA ? Hour Angle (ha)
423-430 F8.3 --- Airmass ? Airmass (airmass)
432-438 F7.1 s Exp ? Effective exposure time (texposure)
440-440 A1 --- stokes Stokes Parameter (stokes)
442-448 I7 --- SNR Maximum Signal-to-noise for spectrum
(snrmax)
450-454 A5 --- normalized If spectrum is normalized (normalized)
456-456 I1 --- magFlag ? Detection Flag (magnetic_detection) (1)
458-489 A32 --- RUNID RUN ID (RUN_ID)
491-522 A32 --- PIname PI name (PI_name)
524-651 A128 --- url Access URL (url_gwet)
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Note (1): Detection flags:
0 : N/A, 1 : I Only, 2 : Definite, 3 : Marginal
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See also:
http://polarbase.irap.omp.eu : Polarbase Website
History:
* 21-Jun-2021: first version received from A.Amato
Acknowledgements:
Pascal Petit, ppetit(at)irap.omp.eu
Jean-Michel Glorian, jglorian(at)irap.omp.eu
(End)