TY - JOUR
T1 - Euclid Quick Data Release (Q1): VIS processing and data products
AU - Euclid Collaboration
AU - Collaboration, Euclid
AU - McCracken, H. J.
AU - Benson, K.
AU - Dolding, C.
AU - Flanet, T.
AU - Grenet, C.
AU - Herent, O.
AU - Hudelot, P.
AU - Laigle, C.
AU - Leroy, G.
AU - Liebing, P.
AU - Massey, R.
AU - Mottet, S.
AU - Nakajima, R.
AU - Nguyen-Kim, H. N.
AU - Nightingale, J. W.
AU - Skottfelt, J.
AU - Soldano, F.
AU - Vilenius, E.
AU - Wander, M.
AU - von Wietersheim-Kramsta, M.
AU - Akhlaghi, M.
AU - Aussel, H.
AU - Awan, S.
AU - Azzollini, R.
AU - Basset, A.
AU - Candini, G. P.
AU - Casenove, P.
AU - Cropper, M.
AU - Hoekstra, H.
AU - Israel, H.
AU - Khalil, A.
AU - Kuijken, K.
AU - Mellier, Y.
AU - Miller, L.
AU - Niemi, S. -M.
AU - Paterson, K.
AU - Schirmer, M.
AU - Zacchei, A.
AU - Barrios, J. P. L. G.
AU - Erben, T.
AU - Hayes, R.
AU - Amara, A.
AU - Casas, S.
AU - Nichol, R. C.
AU - Percival, W. J.
AU - Schewtschenko, J. A.
AU - Gaztanaga, E.
AU - Nadathur, S.
AU - Naidoo, K.
N1 - Paper submitted as part of the A&A Special Issue `Euclid Quick Data Release (Q1)', 21 pages, 21 figures
PY - 2025/7/7
Y1 - 2025/7/7
N2 - This paper describes the VIS Processing Function (VIS PF) of the Euclid ground segment pipeline, which processes and calibrates raw data from the VIS camera. We present the algorithms used in each processing element, along with a description of the on-orbit performance of VIS PF, based on Performance Verification (PV) and Q1 data. We demonstrate that the principal performance metrics (image quality, astrometric accuracy, photometric calibration) are within pre-launch specifications. The image-to-image photometric scatter is less than $0.8\%$, and absolute astrometric accuracy compared to Gaia is $5$ mas Image quality is stable over all Q1 images with a full width at half maximum (FWHM) of $0.\!^{\prime\prime}16$. The stacked images (combining four nominal and two short exposures) reach $I_\mathrm{E} = 25.6$ ($10\sigma$, measured as the variance of $1.\!^{\prime\prime}3$ diameter apertures). We also describe quality control metrics provided with each image, and an appendix provides a detailed description of the provided data products. The excellent quality of these images demonstrates the immense potential of Euclid VIS data for weak lensing. VIS data, covering most of the extragalactic sky, will provide a lasting high-resolution atlas of the Universe.
AB - This paper describes the VIS Processing Function (VIS PF) of the Euclid ground segment pipeline, which processes and calibrates raw data from the VIS camera. We present the algorithms used in each processing element, along with a description of the on-orbit performance of VIS PF, based on Performance Verification (PV) and Q1 data. We demonstrate that the principal performance metrics (image quality, astrometric accuracy, photometric calibration) are within pre-launch specifications. The image-to-image photometric scatter is less than $0.8\%$, and absolute astrometric accuracy compared to Gaia is $5$ mas Image quality is stable over all Q1 images with a full width at half maximum (FWHM) of $0.\!^{\prime\prime}16$. The stacked images (combining four nominal and two short exposures) reach $I_\mathrm{E} = 25.6$ ($10\sigma$, measured as the variance of $1.\!^{\prime\prime}3$ diameter apertures). We also describe quality control metrics provided with each image, and an appendix provides a detailed description of the provided data products. The excellent quality of these images demonstrates the immense potential of Euclid VIS data for weak lensing. VIS data, covering most of the extragalactic sky, will provide a lasting high-resolution atlas of the Universe.
KW - astro-ph.IM
KW - astro-ph.CO
KW - Cosmology: observations
KW - space vehicles: instruments
KW - instrumentation: detectors
KW - surveys
KW - Techniques: imaging spectroscopy
KW - Techniques: photometric
UR - https://doi.org/10.48550/arXiv.2503.15303
U2 - 10.1051/0004-6361/202554594
DO - 10.1051/0004-6361/202554594
M3 - Article
SN - 0004-6361
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
ER -