APERO: A PipelinE to Reduce Observations—Demonstration with SPIRou

Cook, Neil J.; Artigau, Étienne; Doyon, René; Martioli, Eder; Bouchy, F.; Moutou, C.; Usher, Chris; Fouqué, P.; Arnold, L.; Delfosse, X.; Boisse, I.; Cadieux, Charles; Vandal, Thomas; Donati, J.‐F.; Deslières, Ariane

doi:10.1088/1538-3873/ac9e74

Cited by 41 publications

(13 citation statements)

References 91 publications

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“…In this context, it is required to investigate new developments in the extraction pipelines for nIR velocimeters such as SPIRou in order to get RV precision matching the expected RV noise (including photon noise and the instrumental RV precision). SPIRou data are commonly extracted, calibrated, and corrected for their telluric contamination by the APERO pipeline [7]. First RV estimates are obtained primarily using the cross-correlation method.…”

Section: Exoplanet Detection and Characterization With Spiroumentioning

confidence: 99%

Exoplanet science with SPIRou: near-infrared precision velocimetry and spectropolarimetry

Moutou¹,

Donati²,

Debras³

2024

Comptes Rendus. Physique

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Section: Exoplanet Detection and Characterization With Spiroumentioning

confidence: 99%

Exoplanet science with SPIRou: near-infrared precision velocimetry and spectropolarimetry

Moutou¹,

Donati²,

Debras³

2024

Comptes Rendus. Physique

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“…In one instance, on JD 2,459,503.08, the polarimetric sequence was aborted, and the spectrum consists of a single sub-exposure. The raw data were reduced within the SPIRou consortium, using version V6.132 of the APERO pipeline (Cook et al 2022). Spectra were cross-correlated with a K2 spectral mask template over about 6,700 spectral lines, and the radial velocity of the object was derived with sub-km s −1 accuracy (0.08 km s −1 mean rms uncertainty) by fitting a Gaussian to the resulting CCF.…”

Section: Cfht Spirou: Near-infrared Spectropolarimetrymentioning

confidence: 99%

Stable accretion and episodic outflows in the young transition disk system GM Aurigae

Bouvier

Sousa

Pouilly

et al. 2023

A&A

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Context. Young stellar systems actively accrete from their circumstellar disk and simultaneously launch outflows. The physical link between accretion and ejection processes remains to be fully understood. Aims. We investigate the structure and dynamics of magnetospheric accretion and associated outflows on a scale smaller than 0.1 au around the young transitional disk system GM Aur. Methods. We devised a coordinated observing campaign to monitor the variability of the system on timescales ranging from days to months, including partly simultaneous high-resolution optical and near-infrared spectroscopy, multiwavelength photometry, and lowresolution near-infrared spectroscopy, over a total duration of six months, covering 30 rotational cycles. We analyzed the photometric and line profile variability to characterize the accretion and ejection processes. Results. The optical and near-infrared light curves indicate that the luminosity of the system is modulated by surface spots at the stellar rotation period of 6.04 ± 0.15 days. Part of the Balmer, Paschen, and Brackett hydrogen line profiles as well as the HeI 5876 Å and HeI 10830 Å line profiles are modulated on the same period. The Paβ line flux correlates with the photometric excess in the u' band, which suggests that most of the line emission originates from the accretion process. High-velocity redshifted absorptions reaching below the continuum periodically appear in the near-infrared line profiles at the rotational phase in which the veiling and line fluxes are the largest. These are signatures of a stable accretion funnel flow and associated accretion shock at the stellar surface. This large-scale magnetospheric accretion structure appears fairly stable over at least 15 and possibly up to 30 rotational periods. In contrast, outflow signatures randomly appear as blueshifted absorption components in the Balmer and HeI 10830 Å line profiles. They are not rotationally modulated and disappear on a timescale of a few days. The coexistence of a stable, large-scale accretion pattern and episodic outflows supports magnetospheric ejections as the main process occurring at the star-disk interface. Conclusions. Long-term monitoring of the variability of the GM Aur transitional disk system provides clues to the accretion and ejection structure and dynamics close to the star. Stable magnetospheric accretion and episodic outflows appear to be physically linked on a scale of a few stellar radii in this system.

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“…These data are used to calibrate the measurements extracted from the SPIRou spectra. The detailed calibration sequence is described in Cook et al (2022).…”

Section: Observationsmentioning

confidence: 99%

“…The raw data were first reduced with the SPIRou reduction software, A PipelinE to Reduce Observations (APERO) with version 0.6.132 (Cook et al 2022), hereafter v6. APERO first corrects detector effects, removes constant background thermal components, and identifies bad pixels and cosmic-ray impacts.…”

Section: Apero Reductionmentioning

confidence: 99%

A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS

Kiefer

Hébrard

Martioli

et al. 2023

A&A

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TOI-1695 is a V-mag = 13 M-dwarf star from the northern hemisphere at 45 pc from the Sun, around which a 3.134-day periodic transit signal from a super-Earth candidate was identified in TESS photometry. With a transit depth of 1.3 mmag, the radius of candidate TOI-1695.01 was estimated by the TESS pipeline to be 1.82 R⊕ with an equilibrium temperature of ~620 K. We successfully detected a reflex motion of the star and establish that it is due to a planetary companion at an orbital period consistent with the photometric transit period, thanks to a year-long radial-velocity monitoring of TOI-1695 by the SPIRou infrared spectropolarimeter. We used and compared different methods to reduce and analyze those data. We report a 5.5σ detection of the planetary signal, giving a mass of 5.5±1.0 M⊕ and a radius of 2.03±0.18 R⊕. We derive a mean equilibrium planet temperature of 590±90 K. The mean density of this small planet of 3.6±1.1 g cm−3 is similar (1.7σ lower) than that of the Earth. It leads to a nonnegligible fraction of volatiles in its atmosphere with fH,He = 0.28−0.23+0.46% or fwater = 23±12%. TOI-1695 b is a new sub-Neptune planet at the border of the M-dwarf radius valley that can help test formation scenarios for super-Earth and sub-Neptune-like planets.

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APERO: A PipelinE to Reduce Observations—Demonstration with SPIRou

Cited by 41 publications

References 91 publications

Exoplanet science with SPIRou: near-infrared precision velocimetry and spectropolarimetry

Exoplanet science with SPIRou: near-infrared precision velocimetry and spectropolarimetry

Stable accretion and episodic outflows in the young transition disk system GM Aurigae

A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS

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