Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Serendipitous Discovery and Parallax of a Nearby L Dwarf   A field star serendipitously observed in a parallax program proved to have a
proper motion of 562 mas/yr and a parallax of 82 +- 2 mas. The star is
identified with 2MASS J07003664+3157266. A Keck LRIS spectrum shows its
spectral type to be L3.5, as expected from its infrared and optical colors and
absolute magnitude. This object had not been previously recognized as an L
dwarf, perhaps because of crowding at its relatively low Galactic latitude (b =
+15.8 degrees).

3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg