44. Astronomy From Space

J. C. Ives, P. W. Sanford, M. V. Penston, The variability and absorption of the X-ray emission from NGC 4151 The Astrophysical Journal. ,vol. 207, pp. L159- ,(1976) , 10.1086/182203

C. E. Fichtel, D. A. Kniffen, A study of the diffuse galactic gamma radiation Astronomy and Astrophysics. ,vol. 134, pp. 13- 23 ,(1984)

JONATHAN E. GRINDLAY, Diffuse γ-ray background from Seyfert galaxies Nature. ,vol. 273, pp. 211- 211 ,(1978) , 10.1038/273211A0

F. Perotti, A. Della Ventura, G. Sechi, G. Villa, G. Di Cocco, R. E. Baker, R. C. Butler, A. J. Dean, S. J. Martin, D. Ramsden, Low energy |[gamma]|-ray spectrum of NGC4151 Nature. ,vol. 282, pp. 484- 486 ,(1979) , 10.1038/282484A0

Carl Fichtel, David Arnett, Jonathan Grindlay, Jacob Trombka, Gamma Ray Astrophysics Astrophysics from Spacelab. ,vol. 339, pp. 145- 241 ,(1980) , 10.1007/978-94-009-8979-5_4

J. B. G. M. Bloemen, P. Thaddeus, R. J. Maddalena, A. W. Strong, P. A. Caraveo, F. Lebrun, W. Hermsen, Gamma rays from atomic and molecular gas in the large complex of clouds in Orion and Monoceros Astronomy and Astrophysics. ,vol. 139, pp. 37- 42 ,(1984)

D. J. Thompson, C. E. Fichtel, Extragalactic gamma radiation: Use of galaxy counts as a galactic tracer Astronomy and Astrophysics. ,vol. 109, pp. 352- 354 ,(1982)

M. Leventhal, C. J. MacCallum, P. D. Stang, Detection of 511 keV positron annihilation radiation from the galactic center direction The Astrophysical Journal. ,vol. 225, pp. L11- 189 ,(1978) , 10.1086/182782

F. Lebrun, J. A. Paul, Gamma-ray astronomy and the local interstellar medium The Astrophysical Journal. ,vol. 266, pp. 276- 286 ,(1983) , 10.1086/160777

C. A. Meegan, R. C. Haymes, Evidence for variability of hard X-rays from NGC 4151 The Astrophysical Journal. ,vol. 233, pp. 510- 513 ,(1979) , 10.1086/157411