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 in | Astroparticle physics Vol. 34; no. 6; pp. 457 - 466 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
2011
|
Subjects | |
Online Access | Get full text |
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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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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0927-6505 1873-2852 |
DOI: | 10.1016/j.astropartphys.2010.10.010 |