The SWAP EUV Imaging Telescope Part I: Instrument Overview and   Pre-Flight Testing
  The Sun Watcher with Active Pixels and Image Processing (SWAP) is an EUV solar telescope on board ESA's Project for Onboard Autonomy 2 (PROBA2) mission launched on 2 November 2009. SWAP has a spectral bandpass centered on 17.4 nm and provides images of the low solar corona over a 54x54 arcmin field-of-view with 3.2 arcsec pixels and an imaging cadence of about two minutes. SWAP is designed to monitor all space-weather-relevant events and features in the low solar corona. Given the limited resources of the PROBA2 microsatellite, the SWAP telescope is designed with various innovative technologies, including an off-axis optical design and a CMOS-APS detector. This article provides reference documentation for users of the SWAP image data. 
D.B. Seaton, D. Berghmans, B. Nicula, J.-P. Halain, A. De Groof, T.   Thibert, D.S. Bloomfield, C.L. Raftery, P.T. Gallagher...
astro-ph.IM astro-ph.SR