Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deep Spectroscopy of the $M_V\sim -14.8$ Host Galaxy of a Tidal
  Disruption Flare in A1795   A likely tidal disruption of a star by the intermediate-mass black hole
(IMBH) of a dwarf galaxy was recently identified in association with Abell
1795. Without deep spectroscopy for this very faint object, however, the
possibility of a more massive background galaxy or even a disk-instability
flare from a weak AGN could not be dismissed. We have now obtained 8 hours of
Gemini spectroscopy which unambiguously demonstrate that the host galaxy is
indeed an extremely low-mass $(M_\ast\sim 3\times 10^8\; {\rm M}_{\odot})$
galaxy in Abell 1795, comparable to the least-massive galaxies determined to
host IMBHs via other studies. We find that the spectrum is consistent with the
X-ray flare being due to a tidal disruption event rather than an AGN flare. We
also set improved limits on the black hole mass $({\rm log}[M_{\bullet}/{\rm
M}_{\odot}] \sim 5.3 - 5.7)$ and infer a 15-year X-ray variability of a factor
of $> 10^4$. The confirmation of this galaxy-black hole system provides a
glimpse into a population of galaxies that is otherwise difficult to study, due
to the galaxies' low masses and intrinsic faintness, but which may be important
contributors to the tidal disruption rate.

20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
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The categories of this paper are: stat
27
The categories of this paper are: comp-gas