Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: AGAPE : Gravitational microlensing effect to look for MACHOs towards M31   We report the discovery of a short-duration microlensing candidate in the
Northern field of the POINT-AGAPE pixel lensing survey towards M31. The
full-width at half-maximum timescale is very short (tfwhm = 1.8 days) and the
source star has almost certainly been identified on HST images, allowing to
infer an Einstein crossing time : te=10.4 days and a magnification at maximum :
Amax=18.

2
The categories of this paper are: math
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom