Observation in the MINOS far detector of the shadowing of cosmic rays by the sun and moon

► New calculation of geomagnetic effects on cosmic rays. ► New calculation of the one-dimensional moon and sun shadow. ► Hints of interplanetary magnetic field effects on cosmic rays. ► Absolute astrophysical pointing calibration of the MINOS far detector. The shadowing of cosmic ray primaries by th...

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Published inAstroparticle physics Vol. 34; no. 6; pp. 457 - 466
Main Authors Adamson, P., Andreopoulos, C., Ayres, D.S., Backhouse, C., Barr, G., Barrett, W.L., Bishai, M., Bock, B., Bock, G.J., Bogert, D., Bower, C., Budd, S., Cavanaugh, S., Cherdack, D., Childress, S., Choudhary, B.C., Cobb, J.H., Coelho, J.A.B., Coleman, S.J., Cronin-Hennessy, D., de Jong, J.K., Devenish, N.E., Diwan, M.V., Dorman, M., Escobar, C.O., Evans, J.J., Falk, E., Frohne, M.V., Gallagher, H.R., Gomes, R.A., Goodman, M.C., Gouffon, P., Gran, R., Grant, N., Grzelak, K., Habig, A., Harris, P.G., Hartnell, J., Hatcher, R., Himmel, A., Holin, A., Huang, X., Hylen, J., Irwin, G.M., Isvan, Z., Jaffe, D.E., James, C., Kafka, T., Kasahara, S.M.S., Kopp, S., Kordosky, M., Lang, K., Lefeuvre, G., Ling, J., Litchfield, P.J., Litchfield, R.P., Lucas, P., Mann, W.A., Marshak, M.L., Marshall, J.S., Mehdiyev, R., Meier, J.R., Michael, D.G., Mishra, S.R., Moore, C.D., Mualem, L., Mufson, S., Nelson, J.K., Newman, H.B., Nichol, R.J., Nicholls, T.C., Oliver, W.P., Orchanian, M., Paley, J., Pawloski, G., Pearce, G.F., Ratchford, J., Raufer, T.M., Rebel, B., Rodrigues, P.A., Rubin, H.A., Ryabov, V.A., Sanchez, M.C., Schneps, J., Schreiner, P., Semenov, V.K., Shanahan, P., Strait, M., Thomas, J., Thomson, M.A., Thron, J.L., Tinti, G., Toner, R., Tzanakos, G., Urheim, J., White, C., Whitehead, L., Wojcicki, S.G., Wright, D.M., Zwaska, R.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2011
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Summary:► New calculation of geomagnetic effects on cosmic rays. ► New calculation of the one-dimensional moon and sun shadow. ► Hints of interplanetary magnetic field effects on cosmic rays. ► Absolute astrophysical pointing calibration of the MINOS far detector. The shadowing of cosmic ray primaries by the moon and sun was observed by the MINOS far detector at a depth of 2070 mwe using 83.54 million cosmic ray muons accumulated over 1857.91 live-days. The shadow of the moon was detected at the 5.6 σ level and the shadow of the sun at the 3.8 σ level using a log-likelihood search in celestial coordinates. The moon shadow was used to quantify the absolute astrophysical pointing of the detector to be 0.17 ± 0.12°. Hints of interplanetary magnetic field effects were observed in both the sun and moon shadow.
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ISSN:0927-6505
1873-2852
DOI:10.1016/j.astropartphys.2010.10.010