000003666 001__ 3666
000003666 005__ 20191126145238.0
000003666 0247_ $$2DOI$$a10.3847/1538-4357/ab3b08 
000003666 037__ $$aSCART-2018-0080
000003666 100__ $$aO'Hara, J.
000003666 245__ $$aExceptional Extended Field-of-view Observations by PROBA2/SWAP on 2017 April 1 and 3
000003666 260__ $$c2019
000003666 520__ $$aOn 2017 April 1 and 3, two large eruptions on the western solar limb, which were associated with M4.4- and M5.8-class flares, respectively, were observed with the Sun Watcher with Active Pixels and Image Processing (SWAP) Extreme Ultraviolet (EUV) solar telescope on board the Project for On Board Autonomy 2 (PROBA2) spacecraft. The large field-of-view (FOV) of SWAP, combined with an advantageous off-point, allows us to study the eruptions up to approximately 2 solar radii (Rs), where space-based coronagraph observations begin. These measurements provide us with some of the highest EUV observations of an eruption, giving crucial additional data points to track the early evolution of Coronal Mass Ejections. In SWAP observations, we track the evolution of off-limb erupting features as well as associated on-disk EUV waves, and the kinematics of both are calculated. The first eruption shows a clear deceleration throughout the lower corona into coronagraph observations, whereas the second eruption, which had a lower initial velocity, shows no obvious acceleration or deceleration profile. This paper presents a unique set of observations, allowing features observed in EUV to be traced to greater heights in the solar atmosphere, helping to bridge the gap to the FOV of white-light coronagraphs. Even with these favorable data sets, it remains a challenging task to associate features observed in EUV with those observed in white light, highlighting our urgent need for single-instrument observations of the combined lower and middle corona.
000003666 594__ $$aSTCE
000003666 6531_ $$aSun: activity --- Sun: corona --- Sun: coronal mass ejections (CMEs) --- Sun: UV radiation --- waves
000003666 700__ $$aMierla, M.
000003666 700__ $$aPodladchikova, O.
000003666 700__ $$aD'Huys, E.
000003666 700__ $$aWest, M. J.
000003666 773__ $$pAstrophysical Journal$$y2018
000003666 8560_ $$felena.podladchikova@observatoire.be
000003666 905__ $$apublished in
000003666 980__ $$aREFERD