Scientific assessment of the quality of OSIRIS images

Cécilia Tubiana 1 Carsten Guettler 1 G. Kovacs 1 Ivano Bertini 2 D. Bodewits 3 Sonia Fornasier 4, 5 Luisa Lara 6 F. La Forgia 2 S. Magrin 7 M. Pajola 2 H. Sierks 1 Cesare Barbieri 7 Philippe L. Lamy 8 R. Rodrigo 9, 10 Detlef Koschny 11 Hans Rickman 12, 13 H. U. Keller 14, 15 Jessica Agarwal 1 Michael F. A’hearn 3 M. A. Barucci 4 Jean-Loup Bertaux 16 S. Besse 2 S. Boudreault 1 Gabriele Cremonese 17 Vania Da Deppo 18 B. Davidsson 13 S. Debei 19 M. De Cecco 20 M. R. El-Maarry 21 Marco Fulle 22 Olivier Groussin 8 P. Gutiérrez-Marques 1 Pedro J. Gutiérrez 6 N. Hoekzema 1 M. Hofmann 1 Stubbe F. Hviid 15, 1 W-H. Ip 23, 24 Laurent Jorda 8 J. Knollenberg 15 J.-R. Kramm 1 E. Kührt 15 M. Küppers 25 M. Lazzarin 7 Jose J. Lopez Moreno 6 F. Marzari 7 M. Massironi 2, 26 H. Michalik 27 R. Moissl 25 G. Naletto 28 Nilda Oklay 1 F. Scholten 15 X. Shi 1 Nicholas Thomas 29, 21 Jean-Baptiste Vincent 1
Abstract : OSIRIS, the scientific imaging system on board the ESA Rosetta spacecraft, has been imaging the nucleus of comet 67P/Churyumov-Gerasimenko and its dust and gas environment since March 2014. The images serve different scientific goals, from morphology and composition studies of the nucleus surface, to the motion and trajectories of dust grains, the general structure of the dust coma, the morphology and intensity of jets, gas distribution, mass loss, and dust and gas production rates. Aims. We present the calibration of the raw images taken by OSIRIS and address the accuracy that we can expect in our scientific results based on the accuracy of the calibration steps that we have performed. Methods. We describe the pipeline that has been developed to automatically calibrate the OSIRIS images. Through a series of steps, radiometrically calibrated and distortion corrected images are produced and can be used for scientific studies. Calibration campaigns were run on the ground before launch and throughout the years in flight to determine the parameters that are used to calibrate the images and to verify their evolution with time. We describe how these parameters were determined and we address their accuracy. Results. We provide a guideline to the level of trust that can be put into the various studies performed with OSIRIS images, based on the accuracy of the image calibration.
Type de document :
Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2015, 583, A46 (9 p.). 〈10.1051/0004-6361/201525985〉
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Soumis le : lundi 28 septembre 2015 - 10:22:10
Dernière modification le : jeudi 9 novembre 2017 - 09:36:02

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Cécilia Tubiana, Carsten Guettler, G. Kovacs, Ivano Bertini, D. Bodewits, et al.. Scientific assessment of the quality of OSIRIS images. Astronomy and Astrophysics - A&A, EDP Sciences, 2015, 583, A46 (9 p.). 〈10.1051/0004-6361/201525985〉. 〈insu-01205893〉

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