R Aquarii and Gamma Ray Astronomy
2018 June 06
2018 September 13
In the Antarctic Ice core there exist many nitrate ion concentration spikes due to gamma ray. A part of the ice core extracted from the Japanese Antarctic station named Dome Fuji,corresponding with 11th century, shows three set of spikes.The first two possibly coincide with SN1006 and SN1054.The third one is probably due to the symbiotic binary R Auarii's outbursts (1073 and 1074AD)that were recorded in the ancient Korean documents as a "guest star". Moreover,there exist several nitrate ion spikes corresponding with other centuries. Some of the spikes without any historical records are possibly due to the gamma-ray from invisible or missing SNe or other (classical novae or symbiotic star )outbursts.