Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Double degenerates from the supernova Ia progenitor survey (SPY)   We report on follow-up observations of double degenerate (DD) white dwarfs
from the Supernovae Ia Progenitor Survey (SPY). Orbital parameters of four
systems, including a massive short period system, are presented.

37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol