Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observations of Diffuse EUV Emission with the Cosmic Hot Interstellar
  Plasma Spectrometer (CHIPS)   The Cosmic Hot Interstellar Plasma Spectrometer (CHIPS) was designed to study
diffuse emission from hot gas in the local interstellar cavity in the
wavelength range 90 - 265 A. Between launch in January 2003 and early 2004, the
instrument was operated in narrow-slit mode, achieving a peak spectral
resolution of about 1.4 A FWHM. Observations were carried out preferentially at
high galactic latitudes; weighted by observing time, the mean absolute value of
the galactic latitude for all narrow-slit observations combined is about 45
degrees. The total integration time is about 13.2 Msec (74% day, 26% night). In
the context of a standard collisional ionization equilibrium plasma model, the
CHIPS data set tight constraints on the emission measure at temperatures
between 10^{5.55} K and 10^{6.4} K. At 10^{6.0} K, the 95% upper limit on the
emission measure is about 0.0004 cm^{-6} pc for solar abundance plasma with
foreground neutral hydrogen column of 2 x 10^{18} cm^{-2}. This constraint,
derived primarily from limits on the extreme ultraviolet emission lines of
highly ionized iron, is well below the range for the local hot bubble estimated
previously from soft X-ray studies. To support the emission measures inferred
previously from X-ray data would require depletions much higher than the
moderate values reported previously for hot gas.

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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: math