Characterization of OSIRIS NAC filters for the interpretation of multispectral data of comet 67P/Churyumov-Gerasimenko

Oklay, N.; Vincent, J. B.; Sierks, H.; Besse, S.; Pajola, M.; Bertini, I.; Rickman, H.; La Forgia, F.; Barucci, A. M.; Fornasier, S.; Barbieri, C.; Koschny, D.; Lamy, P.; Rodrigo, R.; Agarwal, J.; A'Hearn, M. F.; Bertaux, J. L.; Cremonese, G.; Da Deppo, V.; Davidsson, B.; ... (2015). Characterization of OSIRIS NAC filters for the interpretation of multispectral data of comet 67P/Churyumov-Gerasimenko. Astronomy and astrophysics, 583(A45), A45. EDP Sciences 10.1051/0004-6361/201525994

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Context. We interpret multicolor data from OSIRIS NAC for the remote-sensing exploration of comet 67P/Churyumov-Gerasimenko. Aims. We determine the most meaningful definition of color maps for the characterization of surface variegation with filters available on OSIRIS NAC. Methods. We analyzed laboratory spectra of selected minerals and olivine-pyroxene mixtures seen through OSIRIS NAC filters, with spectral methods existing in the literature: reflectance ratios, minimum band wavelength, spectral slopes, band tilt, band curvature, and visible tilt. Results. We emphasize the importance of reflectance ratios and particularly the relation of visible tilt vs. band tilt. This technique provides a reliable diagnostic of the presence of silicates. Color maps constructed by red-green-blue colors defined with the green, orange, red, IR, and Fe2O3 filters let us define regions that may significantly differ in composition.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Thomas, Nicolas


500 Science > 520 Astronomy
500 Science > 530 Physics




EDP Sciences




Katharina Weyeneth-Moser

Date Deposited:

20 Jun 2016 11:24

Last Modified:

26 Jun 2016 02:16

Publisher DOI:


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