Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimates of multipolar coefficients to search for cosmic ray
  anisotropies with non-uniform or partial sky coverage   We study the possibility to extract the multipolar moments of an underlying
distribution from a set of cosmic rays observed with non-uniform or even
partial sky coverage. We show that if the degree is assumed to be upper bounded
by $L$, each multipolar moment can be recovered whatever the coverage, but with
a variance increasing exponentially with the bound $L$ if the coverage is zero
somewhere. Despite this limitation, we show the possibility to test predictions
of a model without any assumption on $L$ by building an estimate of the
covariance matrix seen through the exposure function.

7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn