Sky brightness evaluation and first coronal signal detection from Concordia Base (Antarctica) with a calibrated micropolarizer array camera ...
The solar corona is the outer layer of the Sun atmosphere. Thebrightness of the solar corona is a million times lower than the solar disk. TheEarth’s sky brightness itself is higher enough to cover the coronal signal duringground-based observations. For this reason, the study of sky characteristics...
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2023
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| Online Access: | https://dx.doi.org/10.48577/jpl.7luooi http://dataverse.jpl.nasa.gov/citation?persistentId=doi:10.48577/jpl.7LUOOI |
| Summary: | The solar corona is the outer layer of the Sun atmosphere. Thebrightness of the solar corona is a million times lower than the solar disk. TheEarth’s sky brightness itself is higher enough to cover the coronal signal duringground-based observations. For this reason, the study of sky characteristics playsa fundamental role in observing the solar corona. To date, the only place withthe sky characteristics that allow continuous coronagraphic measurements fromEarth is at the MLO (Mauna Loa Observatory; Hawaii, ≈ 3400m a.s.l.). Thispaper shows the results obtained as part of the “Extreme Solar CoronagraphyAntarctic Program Experiment” (ESCAPE) at Concordia Base, Antarctica(Dome C plateau - coord: 75 06S; 123 20E - ≈ 3300m above sea level) duringthe 37th campaign and gives a summary of all the sky-brightness measurementsobtained from this site (campaign 34th and 35th). Dome C is confirmed to bea coronagraphic site with a sky brightness value of about 1 × 10−6 B⊙. For thefirst time, it was also possible to detect a ... |
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