Tracing the strong evolution of the X-ray spectrum of SN 2010jl

Supernova (SN) 2010jl is a bright Type IIn SN shown to have Xray emission earlyon. Our three {it Chandra} ACISS observations taken at 58 days, one year and 20months after the SN discovery show dramatically different spectra and strongevolution of the Xray absorption. The spectra indicate high temperatures andhigh absorbing column densities. This is the first time an externalcircumstellar Xray absorption has been clearly observed in a SN, giving us arare opportunity to follow the evolution of the external column density andobtain unique information on circumstellar structure and the shock interaction.In this proposal we request 80 ks of XMMNewton EPICPN and MOS observations ofSN 2010jl at two epochs. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]