Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Redshifts of the Long Gamma-Ray Bursts   The low energy spectra of some gamma-ray bursts' show excess components
beside the power-law dependence. The consequences of such a feature allows to
estimate the gamma photometric redshift of the long gamma-ray bursts in the
BATSE Catalog. There is good correlation between the measured optical and the
estimated gamma photometric redshifts. The estimated redshift values for the
long bright gamma-ray bursts are up to z=4, while for the the faint long bursts
- which should be up to z=20 - the redshifts cannot be determined unambiguously
with this method. The redshift distribution of all the gamma-ray bursts with
known optical redshift agrees quite well with the BATSE based gamma photometric
redshift distribution.

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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
3
The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph