These are complex events and we all struggle to understand the sequence that happens. The progenitor star would be a massive maybe 100 solar mass star that has shed most of its' mass into thin mantle leaving a very dense core of spent fusion fuel like carbon and heavier elements inside as the deeper you go. Event one is the start of the collapse of the core where the accretion disk forms well outside the event horizon. The disk is flat and forms jets that shoot out of it's surface in just two directions. This is where the gamma rays are formed as relativistic particles slam into the thinner mantle. Some of the gamma rays are degraded to optical and this is light that Patrick captured as it was fading away. Event two is the compression of electrons into protons forming neutrons. This event is in all directions and occurs deep in the core next to the event horizon. The delay of this event is caused by the deep gravity well that dialates time. The neutrinos pass quickly through the overlying core and mantle because they don't interact with matter very well. Event three will come in a few days when the light from the heat generated by the explosion finally fights it's way though the core and reaches the thinner mantle. The light is slowed down because it is stopping along the way to interact with the plasma. Unlike the neutrinos it is absorbed and reemitted many many times before it escapes the plasma of the explosion and is seen as the supernova light we are so familiar with. This is my understanding of how the events are unfolding. DT ________________________________ From: "jcarman6@q.com" <jcarman6@q.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Tuesday, May 7, 2013 2:53 PM Subject: [Utah-astronomy] GRB Congrats Patrick. Nice write-up by Betty. So nice to read an article where the facts are straight. You were in the right place at the right time and smart enough to recognize the situation and continue to "snap" pictures and ha ve the software to get a research grade light curve. I'm not sure "amateur" qualifies sometimes with you and others in this situation, but you make amateurs everywhere proud. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".