Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Method to Map Flares in Quasars   Recently, Chartas et al. (2001) detected a rapid X-ray flare in the
gravitationally lensed, multiple image quasar RX J0911.4+0551. Dramatic events,
such as rapid X-ray flares, are useful in providing high precision measurements
of the time delays between multiple images.
  In this paper, we argue that there is a new possibility in measurements of
time delays between multiple images of gravitationally lensed quasars;
constrain the locations of putative flares that give rise to the intrinsic
rapid variabilities of quasars. The realization, however, of these goals cannot
be presently achieved due to the limited accuracy of the current measurements.
We predict that timing flares with accuracies of the order of a few seconds
will be needed to probe the location of the flares. Our proposing method will
work with better instruments in near future, such as XEUS.

31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph