During the total solar eclipse of 11 July 2010, slitless flash spectra were obtained
simultaneously with SWAP/Proba2 174 and AIA/SDO 171, 193, 304 and 131 images.
The optically thin neutral Helium at 4713 A and singly ionized Helium 4686 A Paschen alpha lines are identified on eclipse (15 frames/seconde cadence) spectra where regions of limb prominences are obtained with space-borne imagers.

We summed 80 individual spectra to perform a 2D mapping of the ratio I (He I 4713) / I (He II 4686) and demonstrate a rising of the average temperature at the edge of the prominence. We also evaluate for the first time the continuum modulations in spectra with photometric accuracy. Intensity deficits are observed near the prominence boundaries in both eclipse spectra and in EUV images, confirming that the prominence cavity regions are characterized by some relative depression of plasma density in the surrounding corona.
The enhanced heating occurring in these regions is also discussed.