Počet záznamů: 1
In-flight radiometric calibration of the Metis Visible Light channel using stars and comparison with STEREO-A/COR2 data
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SYSNO ASEP 0574941 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název In-flight radiometric calibration of the Metis Visible Light channel using stars and comparison with STEREO-A/COR2 data Tvůrce(i) De Leo, Y. (DE)
Burtovoi, A. (IT)
Teriaca, L. (DE)
Heinzel, Petr (ASU-R) RID, ORCIDCelkový počet autorů 48 Číslo článku A45 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 676, August (2023)Poč.str. 8 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Sun ; corona ; photometric calibration Obor OECD Astronomy (including astrophysics,space science) CEP GA22-34841S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora ASU-R - RVO:67985815 UT WOS 001044243300001 EID SCOPUS 85168109108 DOI 10.1051/0004-6361/202345979 Anotace We present the results for the in-flight radiometric calibration performed for the Visible Light (VL) channel of the Metis coronagraph on board Solar Orbiter. The radiometric calibration is a fundamental step in building the official pipeline of the instrument, devoted to producing the calibrated data in physical units (L2 data). To obtain the radiometric calibration factor (& epsilon, (VL)), we used stellar targets transiting the Metis field of view. We derived & epsilon, (VL)by determining the signal of each calibration star by means of the aperture photometry and calculating its expected flux in the Metis band pass. The analyzed data set covers the time range from the beginning of the Cruise Phase of the mission (June 2020) until March 2021. Considering the uncertainties, the estimated factor & epsilon, (VL)is in a good agreement with that obtained during the on-ground calibration campaign. This implies that up to March 2021 there was no measurable reduction in the VL channel throughput. Finally, we compared the total and polarized brightness visible light images of the solar corona acquired with Metis and STEREO-A/COR2 during the November 2020 superior conjunction of these instruments. A general good agreement was obtained between the images of these instruments for both the total and polarized brightness. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2024 Elektronická adresa https://hdl.handle.net/11104/0345162
Počet záznamů: 1