Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on the mass and radius of the accreting neutron star in the
  Rapid Burster   The Rapid Burster (MXB 1730-335) is a unique object, showing both type I and
type II X-ray bursts. A type I burst of the Rapid Burster was observed with
Swift/XRT on 2009 March 5, showing photospheric radius expansion for the first
time in this source. We report here on the mass and radius determination from
this photospheric radius expansion burst using a Bayesian approach. After
marginalization over the likely distance of the system (5.8-10 kpc) we obtain
M=1.1+/-0.3 M_sun and R=9.6+/-1.5 km (1-sigma uncertainties) for the compact
object, ruling out the stiffest equations of state for the neutron star. We
study the sensitivity of the results to the distance, the color correction
factor, and the hydrogen mass fraction in the envelope. We find that only the
distance plays a crucial role.

27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom