Artículo
Abstract:
Cosmic ray electrons and positrons constitute an important component of the background for imaging atmospheric Cherenkov Telescope Systems with very low energy thresholds. As the primary energy of electrons and positrons decreases, their contribution to the background trigger rate dominates over protons, at least in terms of differential rates against actual energies. After event reconstruction, this contribution might become comparable to the proton background at energies of the order of few GeV. It is well known that the flux of low energy charged particles is suppressed by the Earth's magnetic field. This effect strongly depends on the geographical location, the direction of incidence of the charged particle and its mass. Therefore, the geomagnetic field can contribute to diminish the rate of the electrons and positrons detected by a given array of Cherenkov Telescopes. In this work we study the propagation of low energy primary electrons in the Earth's magnetic field by using the backtracking technique. We use a more realistic geomagnetic field model than the one used in previous calculations. We consider some sites relevant for new generations of imaging atmospheric Cherenkov Telescopes. We also study in detail the case of 5@5, a proposed low energy Cherenkov Telescope array.© 2012 Elsevier B.V. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Earth magnetic field effects on the cosmic electron flux as background for Cherenkov Telescopes at low energies |
| Autor: | Supanitsky, A.D.; Rovero, A.C. |
| Filiación: | Instituto de Astronomía y Física Del Espacio, IAFE, UBA-CONICET, Argentina |
| Palabras clave: | Cherenkov Telescopes; Cosmic electrons; Geomagnetic field; Cherenkov Telescope; Cosmic ray electrons; Earth magnetic fields; Earth's magnetic field; Electron flux; Event reconstruction; Geographical locations; Geomagnetic field model; Geomagnetic fields; Imaging atmospheric Cherenkov telescopes; Low energies; Low energy thresholds; Primary electrons; Primary energies; Trigger rate; Geomagnetism; Magnetic fields; Optical telescopes; Positrons; Protons; Telescopes; Electrons |
| Año: | 2012 |
| Volumen: | 36 |
| Número: | 1 |
| Página de inicio: | 123 |
| Página de fin: | 130 |
| DOI: | http://dx.doi.org/10.1016/j.astropartphys.2012.04.016 |
| Título revista: | Astroparticle Physics |
| Título revista abreviado: | Astropart. Phys. |
| ISSN: | 09276505 |
| CODEN: | APHYE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09276505_v36_n1_p123_Supanitsky |
Referencias:
- Primack, J., (1999) Astropart. Phys., 11, p. 93
- Albert, I., Fort, J., (2005) Astropart. Phys., 23, p. 493
- Atwood, W.B., (2009) Astrophys. J., 697, p. 1071
- (2011) Exper. Astron., 32, p. 193. , The CTA Consortium
- Konopelko, A., (2005) Astropart. Phys., 24, p. 191
- C. Baixeras, et al., 2004. arXiv:astro-ph/0403180; Aharonian, F.A., (2001) Astropart. Phys., 15, p. 335
- Sacahui, J.R., (2009) AIP Conf. Proc., 1085, p. 858
- Sahakian, V., (2006) Astropart. Phys., 25, p. 233
- Adriani, O., (2011) Phys. Rev. Lett., 106, p. 201101
- Adriani, O., (2011) Science, 332, p. 69
- Chantell, M.C., (1998) Nuclear Instrum. Methods A, 408, p. 468
- Sahakian, V., Akhperjanian, A., (2006) Astropart. Phys., 26, p. 257
- Delahaye, T., (2009) Astron. Astrophys., 501, p. 821
- Cortina, J., González, J.C., (2001) Astropart. Phys., 15, p. 203
- Finlay, C.C., (2010) Geophys. J. Int., 183, p. 1216
- Smart, D.F., (2000) Space Sci. Rev., 93, p. 305
- Commichau, S.C., (2008) Nuclear Instrum. Methods A, 595, p. 572
- Rovero, A., (2009) AIP Conf. Proc., 1085, p. 870
- http://www.mpi-hd.mpg.de/hfm/HESS/; Ackermann, M., (2010) Phys. Rev., 82 D, p. 092004
- Duvernois, M.A., (2001) Astrophys. J., 559, p. 296
- Adriani, O., (2009) Nature, 458, p. 607
- Ackermann, M., (2012) Phys. Rev. Lett., 108, p. 011103
- Störmer, C., The polar aurora (1955) Oxford University Press
- Smart, D.F., Shea, M.A., (2001), http://modelweb.gsfc.nasa.gov/sun/cutoff.html; Petry, D., (2001) Proceedings of 27th International Cosmic Ray Conference, p. 2848. , Hamburg, Germany
- Konopelko, A., (1999) J. Phys., 25 G, p. 1989
- Arnal, M., (2009) Boletín de la Asociación Argentina de Astronomía (BAAA), 52, p. 357
- Aharonian, F., (2008) Rep. Prog. Phys., 71, p. 096901
Citas:
---------- APA ----------
Supanitsky, A.D. & Rovero, A.C. (2012) . Earth magnetic field effects on the cosmic electron flux as background for Cherenkov Telescopes at low energies. Astroparticle Physics, 36(1), 123-130.http://dx.doi.org/10.1016/j.astropartphys.2012.04.016
---------- CHICAGO ----------
Supanitsky, A.D., Rovero, A.C. "Earth magnetic field effects on the cosmic electron flux as background for Cherenkov Telescopes at low energies" . Astroparticle Physics 36, no. 1 (2012) : 123-130.http://dx.doi.org/10.1016/j.astropartphys.2012.04.016
---------- MLA ----------
Supanitsky, A.D., Rovero, A.C. "Earth magnetic field effects on the cosmic electron flux as background for Cherenkov Telescopes at low energies" . Astroparticle Physics, vol. 36, no. 1, 2012, pp. 123-130.http://dx.doi.org/10.1016/j.astropartphys.2012.04.016
---------- VANCOUVER ----------
Supanitsky, A.D., Rovero, A.C. Earth magnetic field effects on the cosmic electron flux as background for Cherenkov Telescopes at low energies. Astropart. Phys. 2012;36(1):123-130.http://dx.doi.org/10.1016/j.astropartphys.2012.04.016
