In-flight radiometric calibration of the Metis Visible Light channel using stars and comparison with STEREO-A/COR2 data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00574941" target="_blank" >RIV/67985815:_____/23:00574941 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0345162" target="_blank" >https://hdl.handle.net/11104/0345162</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202345979" target="_blank" >10.1051/0004-6361/202345979</a>

Result language

angličtina

Original language name

In-flight radiometric calibration of the Metis Visible Light channel using stars and comparison with STEREO-A/COR2 data

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA22-34841S" target="_blank" >GA22-34841S: Science with Solar Orbiter: Focusing on eruptive processes</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Volume of the periodical

676

Issue of the periodical within the volume

August

Country of publishing house

FR - FRANCE

Number of pages

8

Pages from-to

A45

UT code for WoS article

001044243300001

EID of the result in the Scopus database

2-s2.0-85168109108