M100 before the explosion (VLT-FORS1 archival image). M100 after the explosion. SN2006X is vell visible in the center (click on the image to enlarge it). The results of our multi-epoch, high-resolution spectroscopic observations have been published on Science, 17 August 2007. Detection of Circumstellar Material in a Normal Type Ia Supernova . ... Science Daily . Space Daily . 1st Googlescape . ... Science Reprint (PDF, 0.2Mb) . Preprint version (PDF, 2Mb) . ...