Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time and energy dependent characteristics of Thermonuclear burst
  oscillations   We have investigated temporal and spectral properties of a large sample of
thermonuclear bursts with oscillations from eight different sources with spin
frequencies varying from 270 to 620 Hz. For our sample we chose those bursts,
for which the oscillation is sufficiently strong and of relatively long
duration. The emission from the hot-spot that is formed during a thermonuclear
burst is modulated by several physical processes and the burst oscillation
profiles unavoidably carry signatures of these. In order to probe these
mechanisms, we examined the amplitude and phase lags of the burst oscillations
with energy. We also studied the frequency variation of oscillations during
these thermonuclear bursts. We observed that the frequency drifts are more
frequent in the cases where the spin frequency is lower. We found that the
phase lag of the burst oscillations shows no systematic evolution with energy
between the bursts, and also in between different sources. In 7 cases, we do
indeed observe lag of soft energy photons, while there are a significant number
of cases for which hard lag or no lag is observed.

24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg