Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Detection of Molecules in the Atmosphere of HD189733b using HST
  NICMOS Transmission Spectroscopy   The HST/NICMOS transmission spectrum measurements of HD 189733b that suggest
the detection of methane (CH$_{4}$) in an exoplanet atmosphere have been a
source of significant controversy. With what is probably the best analyzed
exoplanet spectroscopy data set to date, different teams, using different
methods, have claimed evidence both contradicting and supporting the original
findings. Here, we report results from a uniform spectral retrieval analysis of
the three, independent, published spectra together with null hypothesis
testing. Based on Bayesian model comparison, we find that two of the three
spectra show strong evidence ($\geq$ 3.6$\sigma$) for the detection of
molecular features mainly due to water and methane while the third is
consistent with a weak molecular detection at the 2.2$\sigma$ level. We
interpret the agreement in the spectral modulation established by previous
authors and the atmospheric retrieval results presented here, as a confirmation
of the original detection of molecular absorbers in the atmosphere of HD
189733b.

15
The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat