Hercules A

Hercules A
Radio-Optical View of the Galaxy Hercules A - Many thanks to: NASA, ESA, S. Baum and C. O'Dea (RIT), R. Perley and W. Cotton (NRAO/AUI/NSF), and the Hubble Heritage Team (STScI/AURA)

Thursday, April 11, 2013

S130411 -- M6.5 flare in AR 11719 followed by strong radio burst

 S130411 -- M6.5 flare in AR 11719 followed by strong radio burst, with types II and IV radiation, Earth directed CME, Moreton wave

At Learmonth Observatory, Australia:
2700 sfu 245 MHz
3000 sfu 1.415 GHz
100 sfu 15.4 GHz

This flare generated a wonderful type IV display at Nancay, in right and left circular polarizations, strongest in RCP, reaching 20 dB above background, 25 to 65 MHz band. Please see selected Nancay spectra below.

Many thanks to SDO, SOHO, LMSAL, Learmonth Observatory,  e-Callisto Solar Observatories in Ireland and Germany:
the Taxpayers of France, and the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory.

SOHO CME images below

Nancay spectra below

SDO image below