Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CTQ 414: A New Gravitational Lens   We report the discovery and ground based observations of the new
gravitational lens CTQ 414. The source quasar lies at a redshift of z = 1.29
with a B magnitude of 17.6. Ground based optical imaging reveals two point
sources separated by 1.2 arcsec with a magnitude difference of roughly 1 mag.
Subtraction of two stellar point spread functions from images obtained in
subarcsecond seeing consistently leaves behind a faint, residual object. Fits
for two point sources plus an extended object places the fainter object
collinear with the two brighter components. Subsequent HST/NICMOS observations
have confirmed the identification of the fainter object as the lensing galaxy.
VLA observations at 8.46 GHz reveal that all components of the lensing system
are radio quiet down to the 0.2 mJy flux level.

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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
2
The categories of this paper are: math
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys