Variations of the TeV energy spectrum at different flux levels of Mkn 421 observed with the HEGRA system of Cherenkov telescopes

Astronomy and Astrophysics

Volumn 393, Issue 1, 2002, Pages 89-99

  Aharonian, F ^a   Akhperjanian, A ^b   Beilicke, M ^c   Bernlohr K ^a   Borst H ^d   Bojahr, H ^e   Bolz, O ^a   Coarasa, T ^f   Contreras, J ^f   Cortina, J ^f   Costamante, L ^a   Denninghoff, S ^f   Fonseca, V ^g   Girma, M ^a   Gotting N ^c   Heinzelmann, G ^c   Hermann, G ^a   Heusler, A ^a   Hofmann, W ^a   Horns, D ^a   Jung, I ^a   Kankanyan, R ^a   Kestel, M ^f   Kettler, J ^a   Kohnle, A ^a   Konopelko, A ^a   Kornmeyer, H ^f   Kranich, D ^f   Krawczynski, H ^a,h   Lampeitl, H ^a   Lopez, M ^g   Lorenz, E ^f   Lucarelli, F ^g   Mang, O ^d   Meyer, H ^e   Mirzoyan, R ^f   Milite, M ^c   Moralejo, A ^g   Ona, E ^g   Panter, M ^a   Plyasheshnikov, A ^a,i   Puhlhofer G ^a   Rauterberg, G ^d   Reyes, R ^f   Rhode, W ^e   Ripken, J ^c   Rowell, G ^a   Sahakian, V ^b   Samorski, M ^d   Schilling, M ^d   Siems, M ^d   Sobzynska, D ^f,j   Stamm, W ^d   Tluczykont, M ^c   Volk H J ^a   Wiedner, C A ^a   Wittek, W ^f   Remillard, R A ^k   more..

^a MAX PLANCK INSTITUT FÜR KERNPHYSIK   (Germany)

^b YEREVAN PHYSICS INSTITUTE   (Armenia)

^c UNIVERSITY OF HAMBURG   (Germany)

^d UNIVERSITY OF KIEL   (Germany)

^e UNIVERSITY OF WUPPERTAL   (Germany)

^f MAX PLANCK INSTITUT FÜR PHYSIK   (Germany)

^g UNIVERSIDAD COMPLUTENSE DE MADRID   (Spain)

^h YALE UNIVERSITY   (United States)

ⁱ ALTAI STATE UNIVERSITY   (Russian Federation)

^j UNIVERSITY OF LODZ   (Poland)

^k MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

more..

Author keywords

BL lacertae objects: Individual: Mkn 421; Gamma rays: Observations

Indexed keywords

ENERGY ABSORPTION; GAMMA RAYS; INFRARED RADIATION; PHOTONS; TELESCOPES;

CHERENKOV TELESCOPES; SPECTRAL HARDNESS;

ASTROPHYSICS;

EID: 17744417174     PISSN: 00046361     EISSN: None     Source Type: Journal    
DOI: 10.1051/0004-6361:20021005     Document Type: Article

References (27)

1. Aharonian, F. A., Akhperjanian, A. G., Barrio, J. A., et al. 1999a, A&A, 349, 11
2. Aharonian, F. A., Akhperjanian, A. G., Andronache, M., et al. 1999b, A&A, 350, 757
3. Aharonian, F. A., Akhperjanian, A. G., Barrio, J. A., et al. 2000, ApJ, 539,317
4. Aharonian, F. A., Akhperjanian, A. G., Barrio, J. A., et al. 2001a, A&A 366, 62
5. Aharonian, F., Akhperjanian, A. G., Barrio, J. A., et al. 2001b, ApJ, 546, 898
6. Aharonian, F. A. 2001, in Proc. of the 27th ICRC, Hamburg [astro-ph/0112314]
7. Börst, H. G., Götting, N., & Remillard, R.2001, IAU Circ., 7568, 3
8. Celotti, A., Fabian, A. C., & Rees, M. J. 1998, MNRAS, 293, 239
9. Djannati-Atai, A., Piron, F., Barrau, et al. 1999, A&A 350, 17
10. Fossati, G., Celotti, A., Chiaberge, M., et al. 2000, ApJ, 541, 166
11. Gaidos, J. A., Akerlof, C. W., Biller, S. D., et al. 1996, Nature, 383, 319
12. Gould, J., & Schréder, G. 1996, Phys. Rev. Lett., 16, 252
13. Konopelko, A., Hemberger, M., Aharonian, F., et al. 1999, Astropart. Phys., 10,275
14. Hofmann, W., Lampeitl, H., Konopelko, A., & Krawczynski, H. 2000, Astropart. Phys., 12, 207
15. Hofmann, W., Jung, I., Konopelko, A., et al. 1999, Astropart. Phys., 12,135
16. Horns, D., Kohnle, A., & Remillard, R.A., et al. 2001, in Proc. of the 27th ICRC, Hamburg, 106ff
17. Krennrich, F., Biller, S. D., Bond I. H., et al. 1999, ApJ, 511,149
18. Krennrich, F., Badran, H. M., Bond., I. H., et al. 2001, ApJ, 560, L45
19. Krawczynski, H., Coppi, P. S., Maccarone, T., & Aharonian, F. A. 2000, A&A, 353, 97
20. Krawczynski, H., Sambruna, R., Kohnle, A., et al. 2001, ApJ, 559, 187
21. Jordan, M., Buckley, J. H., Cowsik, R., et al.2001, in Proc.of the 27th ICRC, Hamburg, 2851ff
22. Malizia, A., Capalbi, M., Fiore, F., et al. 2000, MNRAS, 312, 123
23. Nied, P. M., Sadun, A. C., Kelly, M., et al. 2001, Amer. Astron. Soc. Meet., 199, 9817
24. Piron, F., Djannati-Atai, A., Punch, M., et al. 2001, A&A 374, 895
25. Punch, M., Akerlof, C. W., Cawley, M. F., et al. 1992, Nature 358, 477
26. Stecker, F. W., De Jager, O. C., & Salamon, M. H. 1992, ApJ, 390, L49
27. Tavecchio, F., et al. 2001, ApJ, 554, 725