ESO DOI Service

• European Southern Observatory (ESO)

https://archive.eso.org/doidownload/script/CRIRESplus

2025

European Southern Observatory (ESO)

Dataset/Dataset

Abstract: This is the release of reduced 1D spectra from the upgraded CRIRES instrument, the CRIRES+ spectrograph. It contains the vast majority of the CRIRES+ observations, from start of operations in October 2021, until present. The L-band and M-band data, ASTROMETRY, POLARIMETRY and 2D observations have not been included because master calibrations are not produced or the related science recipes have not been validated. This release is an open stream release. Data content is not fixed but grows with time as new data are being acquired and processed (approximately with monthly cadence and with a delay of one to two months). Data have been reduced using the CRIRES+ pipeline version CR2RE-1.6.2 or higher. All data have their instrument signature removed: they have been de-biased, flat-fielded, wavelength-calibrated, extracted, sky-subtracted and finally nodding-coadded in case of nodding. Error estimates and quality flags are provided. The processing is performed by the ESO Science Data Quality Group in an automated process. It uses the archived, closest-in-time, quality-controlled, and certified master calibrations. This data release contains data products, expected to be useful for any kind of high resolution infrared spectroscopic research, including abundance, line profile, and radial velocity studies. For studies of spectral energy distribution where the continuum shape is relevant, the researcher should keep in mind that the CRIRES+ instrument is a high resolution spectrograph, designed for wavelength stability and efficiency. It is usually not operated to achieve high-precision spectrophotometry. Slit losses have to be expected as the instrument is not equipped with a wide slit. There has been no attempt to correct for telluric absorption lines. The flux standard stars, telluric standard stars and radial velocity standard stars measured regularly on a weekly basis by the observatory as part of the calibration plan as well as user provided standard stars have been included in the data release as stand-alone science-grade spectra.
Other: This is a dynamic dataset; it is growing as new data is added. The DOI refers to the newest available dataset.

DataCurator: Hummel, Wolfgang
ContactPerson: Ivanov, Valentin
ContactPerson: Mascetti, Laura

collection_name:CRIRESplus collection_type:Data Stream instrument:CRIRES

References: https://archive.eso.org (URL)

Issued: 2025-06-04

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