Preliminary comparisons between the LASCO/C2-C3 and STEREO-COR2 A and B coronagraph images |
Fabien Saez
(Laboratoire d\'Astrophysique de Marseille)
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Lamy, Philippe
(Laboratoire d\'Astrophysique de Marseille)
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Llebaria, Antoine
(Laboratoire d\'Astrophysique de Marseille)
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Boursier, Yannick
(Laboratoire d\'Astrophysique de Marseille)
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Ernandes, Fabrice
(Laboratoire d\'Astrophysique de Marseille)
|
| Abstract |
| We present a study which qualitatively and quantitatively compares the performances of the SECCHI-COR2 A and B
coronagraphs and the LASCO-C2 and C3 coronagraphs. We find that the instrumental straylight backgrounds in COR2 A and B
is quite large. They are first removed from the the calibrated images using a method which determines
the temporal minimum from a set of all polarized images, and compared to the background extracted from the
LASCO-C2 and C3 images using the polarimetric method. Finally we compare the coronal images obtained
from the four coronagraphs and discuss the prospects of the 3D reconstruction of CMEs.
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