Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Near-Infrared Spectral Template for Quasars   We present a near-infrared quasar composite spectrum spanning the wavelength
range 0.58 - 3.5 um. The spectrum has been constructed from observations of 27
quasars obtained at the NASA IRTF telescope and satisfying the criteria Ks <
14.5 and Mi < -23; the redshift range is 0.118 < z < 0.418. The signal-to-noise
is moderate, reaching a maximum of 150 between 1.6 and 1.9 um. While a
power-law fit to the continuum of the composite spectrum requires two breaks, a
single power-law slope of alpha=-0.92 plus a 1260 K blackbody provides an
excellent description of the spectrum from H-alpha to 3.5 um, strongly
suggesting the presence of significant quantities of hot dust in this
blue-selected quasar sample. We measure intensities and line widths for ten
lines, finding that the Paschen line ratios rule out Case B recombination. We
compute K-corrections for the J, H, K, and Spitzer 3.6 um bands which will be
useful in analyzing observations of quasars up to z=10.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph