Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crowded Field 3D Spectroscopy   The quantitative spectroscopy of stellar objects in complex environments is
mainly limited by the ability of separating the object from the background.
Standard slit spectroscopy, restricting the field of view to one dimension, is
obviously not the proper technique in general. The emerging Integral Field (3D)
technique with spatially resolved spectra of a two-dimensional field of view
provides a great potential for applying advanced subtraction methods. In this
paper an image reconstruction algorithm to separate point sources and a smooth
background is applied to 3D data. Several performance tests demonstrate the
photometric quality of the method. The algorithm is applied to real 3D
observations of a sample Planetary Nebula in M31, whose spectrum is
contaminated by the bright and complex galaxy background. The ability of
separating sources is also studied in a crowded stellar field in M33.

33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph