J/A+A/683/A125 HARPS radial velocity database (Perdelwitz+, 2024)
Analysis of the public HARPS/ESO spectroscopic archive.
Ca II H&K time series for the HARPS radial velocity database.
Perdelwitz V., Trifonov T., Teklu J.T., Sreenivas K.R., Tal-Or L.
<Astron. Astrophys. 683, A125 (2024)>
=2024A&A...683A.125P 2024A&A...683A.125P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities
Keywords: techniques: radial velocities - stars: activity - stars: late-type -
planetary systems
Abstract:
Magnetic activity is currently the primary limiting factor in radial
velocity (RV) exoplanet searches. Even inactive stars, such as the
Sun, exhibit RV jitter on the order of a few m/s due to active regions
on their surfaces. Time series of chromospheric activity indicators,
such as the Ca II H&K lines, can be utilized to reduce the impact of
such activity phenomena on exoplanet search programs. In addition, the
identification and correction of instrumental effects can improve the
precision of RV exoplanet surveys. We aim to update the HARPS-RVBank
RV database, previously published by Trifonov et al.
(2020A&A...636A..74T 2020A&A...636A..74T, J/A+A/636/A74), and include additional 3.5 years
of time series and Ca II H&K lines R'HK chromospheric activity
indicators. This additional data will aid in the analysis of the
impact of stellar magnetic activity on the RV time series obtained
with the HARPS instrument. Our updated database aims to provide a
valuable resource for the exoplanet community in understanding and
mitigating the effects of such stellar magnetic activity on RV
measurements. The new HARPS-RVBank database includes all stellar
spectra obtained with the HARPS instrument prior to January 2022. The
RVs corrected for small but significant nightly zero-point variations
were calculated using the same method described in Trifonov et al.
(2020A&A...636A..74T 2020A&A...636A..74T, J/A+A/636/A74). The R'HK estimates were
determined from both individual spectra and co-added template spectra
using the methodology outlined in Perdelwitz et al.
(2021A&A...652A.116P 2021A&A...652A.116P, Cat. J/A+A/652/A116), which utilizes synthetic
model spectra. As input for our derivation of R'HK, we derived stellar
parameters from coadded, high-SNR templates for a total of 3849 stars
using the stellar parameter code SPECIES (Soto et al.,
2018A&A...615A..76S 2018A&A...615A..76S, Cat. J/A+A/615/A76) The new version of the HARPS
RV database has a total of 252615 RVs of 5239 stars. Of these, 200774
have R'HK values, which corresponds to 80% of all publicly available
HARPS spectra. Currently, this is the largest public database of
high-precision (down to ∼1m/s) RVs, and the largest compilation of
R'HK measurements. We also derive lower limits the RV jitter of F-, G-
and K-type stars as a function of R'HK.
Description:
We obtained all available HARPS stellar spectra from the ESO archive1
that were observed prior to January 2022.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 211 3612 Stellar Parameters
table4.dat 708 252615 Individual radial velocity measurements and
auxiliary data for all targets
(corrected version, 20-Apr-2026)
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See also:
J/A+A/636/A74 : HARPS radial velocity database (Trifonov+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Target Target name
16- 35 F20.16 deg RAdeg Right ascension (J2000)
37- 57 F21.17 deg DEdeg Declination (J2000)
59- 82 E24.19 --- RHKp ?=- Relative chromospheric emission in the
CaII H&K lines
84-107 E24.19 --- e_RHKp ?=- Relative chromospheric emission in the
CaII H&K lines error
109-129 F21.15 --- S/N Signal-to-noise ratio
131 I1 --- Sourflag [0/1] Source flag (0=source was determined)
133 I1 --- RVflag [0] RV flag (0=RV is known)
135 I1 --- vsinflag [0/2] vsini flag (G1)
137 I1 --- metaflag [0/1] Metallicity flag (G2)
139-146 F8.2 K Teff Effective temperature
148-155 F8.4 K e_Teff Effective temperature error
157-163 F7.5 [cm/s2] logg Surface gravity
165-173 F9.7 [cm/s2] e_logg Surface gravity error
175-184 F10.7 [-] [Fe/H] Metallicity
186-194 F9.7 [-] e_[Fe/H] Metallicity error
196-202 F7.4 km/s vsini Rotational velocity
204-211 F8.5 km/s e_vsini Rotational velocity error
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 A14 --- Target Target name (target)
16- 35 F20.16 deg RAdeg ?=- Righ ascension (J2000) (ra)
37- 57 F21.17 deg DEdeg ?=- Declination (dec)
59- 73 F15.7 d BJD Barycentric Lunian date (BJD)
75- 87 E13.6 m/s DRVmlcnzp ?=- Differential RV from SERVAL
corrected for BERV, SA, drift, NZP,
NZPdrift, -pre and -post calculated
separately) (RVmlcnzp)
89- 98 F10.6 m/s e_DRVmlcnzp ?=- Differential radial velocity
error (eRVmlc_nzp)
100-117 E18.15 m/s RVdrsnzp ?=- Radial velocity from DRS
corrected for BERV, SA, drift, NZP,
NZPdrift, corrected, -pre and -post
calculated separately) (RVdrsnzp)
119-127 F9.6 m/s e_RVdrsnzp ?=- Radial velocity error error
(eRVdrs_nzp)
129-141 E13.6 m/s DRVmlc Differential RV from SERVAL corrected for
BERV, SA, drift, (non-NZP corrected),
-pre and -post calculated separately
(RV_mlc)
143-152 F10.6 m/s e_DRVmlc ?=- Differential SERVAL radial
velocity error (eRVmlc)
154-169 E16.12 m/s RVdrs ?=- RV from DRS corrected for BERV,
SA, drift, (non-NZP corrected), -pre and
-post calculated separately) (RV_drs)
171-179 F9.6 m/s e_RVdrs ?=- DRS radial velocity error error
(eRVdrs)
181-193 E13.6 m/s DRVmlcj Differential RV from SERVAL corrected for
BERV, SA, drift, (non-NZP corrected,
joint RV calculation with -pre and -post
fibre upgrade data) (RVmlcj)
195-204 F10.6 m/s e_DRVmlcj ?=- Differential radial velocity
error (eRVmlc_j)
206-219 E14.6 m/s CRX Chromatic index from SERVAL (CRX)
221-233 F13.6 m/s e_CRX Chromatic index error (e_CRX)
235-246 E12.6 m/s.km/s dLW Differential line width from SERVAL (dLW)
248-257 E10.6 m/s.km/s e_dLW Differential line width error (e_dLW)
259-267 F9.6 --- Halpha Halpha index from SERVAL (Halpha)
269-276 E8.6 --- e_Halpha Halpha index error (e_Halpha)
278-286 F9.6 --- NaD1 NaD1 index (NaD1)
288-296 E9.6 --- e_NaD1 [] NaD1 index error (e_NaD1)
298-306 F9.6 --- NaD2 NaD2 index (NaD2)
308-316 E9.6 --- e_NaD2 [] NaD2 index error (e_NaD2)
318-322 F5.1 --- Flag [0/128] SERVAL flag bitwise flag
(f_RV) (1)
324-335 F12.6 km/s FWHMDRS ?=- Full width half maximum from DRS
(FWHM_DRS)
337-349 F13.6 --- Contrast ?=- Constrast from DRS (CONTRAST_DRS)
351-371 E21.17 km/s BIS ?=- Bisector span measurement
from DRS (BIS)
373-382 F10.3 km/s RVguess ?=-99999 User guess for absolute RV
from DRS (RVGUESS)
384-388 F5.1 --- SNRDRS Signal-to-noise ratio in order 55 from DRS
(SNR_DRS)
390-402 F13.5 d BJDDRS Barycentric Julian date from DRS (BJD_DRS)
404-413 E10.6 km/s BERV Barycentric Earth radial velocity (BERV)
415-424 E10.6 km/s BERVDRS Barycentric Earth radial velocity from DRS
(BERV_DRS)
426-432 F7.3 m/s DRIFT ?=- Drift measure (DRIFT)
434-436 F3.1 m/s e_DRIFT ?=- Drift measure error (e_DRIFT)
438-447 E10.6 m/s SA ?=- Contribution from secular
acceleration (SA)
449-458 E10.6 m/s NZPmlc ?=- NZP for BJD (NZP_mlc)
460-467 F8.6 m/s dNZPmlc ?=- Contribution from intra-night
systematics (dNZP_mlc)
469-478 E10.6 --- NZPdrs ?=- NZP for DRS (NZP_drs)
480-487 F8.6 --- dNZPdrs ?=- Contribution from intra-night
systematics (dNZP_drs)
489-493 F5.2 --- TMmean Flux weighted mean point (TMMEAN)
495-503 F9.4 s ExpTime Exposure time (EXPTIME)
505-520 E16.12 m/s MLCRX ML Chromatic index (Slope over logarithmic
wavelength) (MLCRX)
522-533 F12.6 m/s e_MLCRX ?=- ML Chromatic index error (E_MLCRX)
535-557 A23 "datime" TimeId Identifier for file (TIMEID)
559-561 A3 --- Mask DRS MASK for CCF (MASK)
563-576 A14 --- ProgID Program ID (PROGID)
578-593 A16 --- ProgPI Program PI name (PROGPI)
595-611 A17 --- OBHAB HARPS template (OBHAB)
613-636 A24 --- THARFP THAR False alarm (THAR_FP)
638-660 A23 --- DPRTYPE DPR type (DPR_TYPE)
662-682 E21.19 --- RHKp ?=- Relative chromospheric emission in the
CaII H&K lines (RHKp)
684-704 E21.19 --- e_RHKp []?=- Relative chromospheric emission in
the CaII H&K lines error (dRHKp)
706 I1 --- vsinflag [0/2]? vsini flag (sourceflag) (G1)
708 I1 --- metflag [0/1]? Metallicity flag (vsinflag) (G2)
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Note (1): Bitwise flag as follows:
0 = normal (reliable) spectra
64 = spectra with too low S/N
128 = spectra with too high S/N
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Global notes:
Note (G1): vsini flag as follows:
0 = vsini was determined from stellar templates
1 = vsini could not be determined in any way
2 = vsini is taken from the latest Gaia release
(2022yCat.1355....0G 2022yCat.1355....0G, Gaia DR3, Cat. I/355)
Note (G2): Metallicity flag as follows:
0 = metallicity was determined from the stellar templates
1 = metallicity was not determined
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Acknowledgements:
Volket Perdelwitz, volker.perdelwitz(at)weizmann.ac.il
History:
15-Mar-2024: on-line version
20-Apr-2026: corrected table4.dat
(End) Patricia Vannier [CDS] 20-Nov-2023