Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primordial Black Hole Binaries as a Source of Gamma-Ray Bursts and of a
  High-Frequent Gravitational Radiation   Ultracompact primordial black hole binaries with masses > 10^{16} g are
considered. If PBHB's contribute significant part of the dark matter of the
Galaxy one can expect an existence of high-frequent non-thermal diffuse
gravitational radiation with flux of ~1 erg cm^{-2} s^{-1}. The possibility of
coalescence of the PBHB's in Galaxy's halo to be a source at least of a part of
gamma-ray bursts (GRB) observed is discussed. The energy flux of gravitational
radiation from those GRB's should exceed the energy flux of gamma-radiation by
7-8 orders of magnitude. The possibility of observation of PBHB through
detection of the gravitational radiation burst coincident with GRB is
emphasized. The PBHB also can be observed detecting a stationary gravitatonal
radiation in the frequency range > 10^4 Hz and observing a high-frequent
pulsation of a source's brightness in microlensing effects in the Galaxy's
halo.

20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas