J/A+A/674/A164 Radial velocity data of sigma Dra and HIP 36616 (Heeren+, 2023)
Pyodine: an open, flexible reduction software for iodine-calibrated precise
radial velocities.
Heeren P., Tronsgaard R., Grundahl F., Reffert S., Quirrenbach A.,
Palle P.L.
<Astron. Astrophys. 674, A164 (2023)>
=2023A&A...674A.164H 2023A&A...674A.164H (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Stars, giant ; Stars, K-type ;
Exoplanets ; Radial velocities ; Optical
Keywords: methods: data analysis - techniques: radial velocities -
techniques: spectroscopic - planets and satellites: detection
Abstract:
For existing and future projects dedicated to measuring precise RVs,
we have created an open-source, flexible data reduction software to
extract RVs from echelle spectra via the I2 cell method. The
software, called pyodine, is completely written in Python and has been
built in a modular structure to allow for easy adaptation to different
instruments.
We adapted pyodine to several instruments, two of them being the
Hertzsprung SONG located at Teide Observatory (SONG hereafter), and
the Hamilton spectrograph at Lick Observatory (Lick hereafter). Both
for SONG and Lick data, the pyodine results generally match the RV
precision achieved by the dedicated instrument pipelines. Notably,
results from our code confirm the planet-induced RV variations of the
star HIP 36616 on spectra from SONG and Lick. A probable instrumental
effect of SONG is still visible in the pyodine RVs of the star sigma
Dra, despite being a bit damped as compared to the original RVs
computed by iSONG.
Description:
Precise radial velocities (RVs) of the stars sigma Dra and HIP 36616
are presented. For sigma Dra, 2061 spectra were taken between 2014 and
2022 with the Hertzsprung SONG spectrograph at Teide Observatory,
which resulted in 1905 RVs computed by the iSONG reduction code, and
1925 RVs computed by our pyodine code. For HIP 36616, 91 spectra were
taken between 1999 and 2011 with the Hamilton spectrograph at Lick
Observatory, which resulted in 85 RVs computed by our pyodine code.
Another 108 spectra of HIP 36616 were taken with the SONG spectrograph
between 2015 and 2022, resulting in 106 pyodine-computed RVs.
Objects:
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RA (2000) DE Designation(s)
----------------------------------------------------
19 32 21.59 +69 39 40.2 sigma Dra = HIP 96100
07 31 48.40 +17 05 09.7 HIP 36616 = HR 2877
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
sdra_is.dat 38 1905 RV data of sigma Dra, computed with iSONG
from Hertzsprung SONG spectra
sdra_py.dat 38 1925 RV data of sigma Dra, computed with pyodine
from Hertzsprung SONG spectra
hip_lick.dat 38 85 RV data of HIP 36616, computed with pyodine
from spectra from Lick Observatory
hip_song.dat 38 106 RV data of HIP 36616, computed with pyodine
from Hertzsprung SONG spectra
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See also:
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
J/A+A/574/A116 : G and K giant stars stellar parameters (Reffert+, 2015)
Byte-by-byte Description of file: hip_*.dat sdra_*.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d JD Julian date
18- 26 F9.2 m/s RV Radial velocity
34- 38 F5.2 m/s e_RV Error in radial velocity
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Acknowledgements:
Paul Heeren, pheeren(at)lsw.uni-heidelberg.de
References:
Andersen et al., 2014RMxAC..45...83A 2014RMxAC..45...83A
Andersen et al., 2016RMxAC..48...54A 2016RMxAC..48...54A
Fredslund Andersen et al., 2019PASP..131d5003F 2019PASP..131d5003F
Grundahl et al., 2017ApJ...836..142G 2017ApJ...836..142G
Tala et al., 2016SPIE.9908E..6OT
Butler et al., 1996PASP..108..500B 1996PASP..108..500B
Ortiz et al., 2016A&A...595A..55O 2016A&A...595A..55O
Trifonov et al., 2018AJ....155..174T 2018AJ....155..174T
(End) Paul Heeren [LSW], Patricia Vannier [CDS] 08-May-2023