Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Can gravitational waves be detected in quasar microlensing?   Studies of the lensed quasar ${\rm Q}0957+561 {\rm A,B}$ have shown evidence
for microlensing in the brightness history of the quasar images. It had been
suggested that a frequency offset between the brightness fluctuations in each
of the two images might possibly be caused by gravitational radiation generated
by a massive black hole binary at the center of the lensing galaxy. This paper
demonstrates that the fluctuations produced by such a source of gravitational
waves will be too small to account for the observed frequency offsets.

0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat