Possible structure in the cosmic ray electron spectrum measured by the ATIC-2 and ATIC-4 experiments

Panov, A. D.; Zatsepin, V. I.; Sokolskaya, N. V.; Adams Jr., J. H.; Ahn, H. S.; Bashindzhagyan, G. L.; Chang, J.; Christl, M.; Guzik, T. G.; Isbert, J.; Kim, K. C.; Kouznetsov, E. N.; Panasyuk, M. I.; Postnikov, E. B.; Seo, E. S.; Watts, J.; Wefel, J. P.; Wu, J.

doi:doi:10.5194/astra-7-119-2011

Astrophys. Space Sci. Trans., 7, 119-124, 2011
www.astrophys-space-sci-trans.net/7/119/2011/
doi:10.5194/astra-7-119-2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.

Volume 7, issue 2

18 Apr 2011

Possible structure in the cosmic ray electron spectrum measured by the ATIC-2 and ATIC-4 experiments
A. D. Panov¹, V. I. Zatsepin¹, N. V. Sokolskaya¹, J. H. Adams Jr.², H. S. Ahn³, G. L. Bashindzhagyan¹, J. Chang⁴, M. Christl², T. G. Guzik⁵, J. Isbert⁵, K. C. Kim³, E. N. Kouznetsov¹, M. I. Panasyuk¹, E. B. Postnikov¹, E. S. Seo³, J. Watts², J. P. Wefel⁵, and J. Wu³
¹Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia
²Marshall Space Flight Center, Huntsville, AL, USA
³University of Maryland, Institute for Physical Science and Technology, College Park, MD, USA
⁴Purple Mountain Observatory, Chinese Academy of Sciences, China
⁵Louisiana State University, Department of Physics and Astronomy, Baton Rouge, LA, USA

Received: 27 Oct 2010 – Revised: 01 Feb 2011 – Accepted: 28 Feb 2011 – Published: 18 Apr 2011

Abstract. A strong excess in a form of a wide peak in the energy range of 300–800 GeV was discovered in the first measurements of the electron spectrum in the energy range from 20 GeV to 3 TeV by the balloon-borne experiment ATIC (Chang et al., 2008b). The experimental data processing and analysis of the electron spectrum with different criteria for selection of electrons, completely independent of the results reported in Chang et al. (2008b) is employed in the present paper. The new independent analysis generally confirms the results of Chang et al. (2008b), but shows that the spectrum in the region of the excess is represented by a number of narrow peaks. The measured spectrum is compared to the spectrum of Chang et al. (2008b) and to the spectrum of the Fermi/LAT experiment.

Citation: Panov, A. D., Zatsepin, V. I., Sokolskaya, N. V., Adams Jr., J. H., Ahn, H. S., Bashindzhagyan, G. L., Chang, J., Christl, M., Guzik, T. G., Isbert, J., Kim, K. C., Kouznetsov, E. N., Panasyuk, M. I., Postnikov, E. B., Seo, E. S., Watts, J., Wefel, J. P., and Wu, J.: Possible structure in the cosmic ray electron spectrum measured by the ATIC-2 and ATIC-4 experiments, Astrophys. Space Sci. Trans., 7, 119-124, doi:10.5194/astra-7-119-2011, 2011.

Astrophysics and Space Sciences Transactions

An Open Access Journal of the Arbeitsgemeinschaft Extraterrestrische Forschung e.V.