Fermi LAT Images Showing the Gamma-Ray Sky around the Blazar PKS B1424-418 (IMAGE)

NASA/Goddard Space Flight Center

Fermi LAT Images Showing the Gamma-Ray Sky around the Blazar PKS B1424-418

Caption

Fermi LAT images showing the gamma-ray sky around the blazar PKS B1424-418. Brighter colors indicate greater numbers of gamma rays. The dashed arc marks part of the source region established by IceCube for the Big Bird neutrino (50-percent confidence level). Left: An average of LAT data centered on July 8, 2011, and covering 300 days when the blazar was inactive. Right: An average of 300 active days centered on Feb. 27, 2013, when PKS B1424-418 was the brightest blazar in this part of the sky.

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Credits: NASA/DOE/LAT Collaboration

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