Supernova P Cygni profiles › Forums › Variable Stars › possible supernova AT 2021gmj in NGC3310 (UMa) › Supernova P Cygni profiles 5 April 2021 at 10:22 pm #584057 Hugh AllenParticipant Hi Robin, Very nice supernova spectrum as always. What is the correct way to estimate ejecta velocities along the line of sight from P Cygni profiles? Is it the emission centre to the absorption minimum or to the absorption blue edge? Cheers Hugh
