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The spectrum of isotropic diffuse gamma-ray emission between 100 MeV and 820 GeV
The Fermi LAT collaboration, M. Ackermann, M. Ajello +142
The γ-ray sky can be decomposed into individually detected sources, diffuse emission attributed to the interactions of Galactic cosmic rays with gas and radiation fields, and a res…
2FGL J1653.6-0159: A New Low in Evaporating Pulsar Binary Periods
Roger W. Romani, Alexei V. Filippenko, S. Bradley Cenko
We have identified an optical binary with orbital period P_b=4488s as the probable counterpart of the Fermi source 2FGL J1653.6-0159. Although pulsations have not yet been detected…
Temporal Correlations Between Optical and Gamma-ray Activity in Blazars
Daniel P. Cohen, Roger W. Romani, Alexei V. Filippenko +4
We have been using the 0.76-m Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory to optically monitor a sample of 157 blazars that are bright in gamma rays, being detec…