Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Period and Burst Histories of AXPs and SGRs and the Possible
  Evolution of these Objects on the P-Pdot Diagram   In this paper, timing data for all of the anomalous X-ray pulsars and soft
gamma repeaters are compiled. Timing properties of these objects are
investigated. The effect of bursts of soft gamma repeaters on their period
history is investigated. The P-Pdot diagram for pulsars, X-ray binaries,
anomalous X-ray pulsars, soft gamma repeaters and dim radio quiet netron stars
is constructed. The possible evolutionary tracks for anomalous X-ray pulsars,
soft gamma repeaters and dim radio quiet netron stars are examined.

15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat