EGRET Limits on High-Energy Gamma-Ray Emission from X-Ray-- and Low-Energy Gamma-Ray--selected Seyfert Galaxies

1993 ◽  
Vol 416 ◽  
pp. L53 ◽  
Author(s):  
Y. C. Lin ◽  
D. L. Bertsch ◽  
B. L. Dingus ◽  
C. E. Fichtel ◽  
R. C. Hartman ◽  
...  
2016 ◽  
Author(s):  
Masaaki Hayashida ◽  
Hajime Takami ◽  
Yusuke Konno ◽  
Ryosuke ITOH

2001 ◽  
Vol 562 (2) ◽  
pp. 918-924 ◽  
Author(s):  
K. S. Cheng ◽  
L. Zhang

1991 ◽  
Vol 379 ◽  
pp. 290 ◽  
Author(s):  
K. S. Cheng ◽  
K. N. Yu ◽  
T. Cheung ◽  
M. M. Lau

2011 ◽  
Vol 734 (2) ◽  
pp. L27 ◽  
Author(s):  
A. A. Abdo ◽  
M. Ackermann ◽  
M. Ajello ◽  
L. Baldini ◽  
J. Ballet ◽  
...  

1989 ◽  
Vol 42 (5) ◽  
pp. 581
Author(s):  
PG Edwards ◽  
D Ciampa ◽  
RW Clay ◽  
JR Patterson

Observations have been made with the Buckland park air shower array over a two-year period from June 1984. We have examined events from the directions of six binary X-ray systems to search for any periodic component associated with ultra-high-energy gamma-ray emission above a threshold energy of -9xl014 eV. No statistically significant excess has been found and upper limits to the individual fluxes are presented.


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