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Paper: Flare of SGR A* at Short Millimeter Wavelengths
Volume: 186, The Central Parsecs of the Galaxy
Page: 105
Authors: Tsuboi, M.; Miyazaki, A.; Tsutsumi, T.
Abstract: We have performed 3 sets of one-month intensity monitor observations toward Sgr A*, at ν = 100 and 140 GHz from 1996 to 1998 using the Nobeyama Millimeter Array. We got following results; 1) We detected a flare of Sgr A* in March 1998. The flux density at ν = 100 GHz was flared over (Δ S/S =) 100% in a week and decreased to the mean flux density within two weeks. The flux density in the flare at ν = 140 GHz was also increased over (Δ S/S =) 100%. 2) The flux densities in the flare are consistent with the power-law spectrum of α = 0.6 (S ~ να). On the other hand, the mean flux densities in quiescent phase in 1996--1998 are consistent with the power-law spectrum of α = 0.3.
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