Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chandra HRC Localization of the Low Mass X-ray Binaries X1624-490 and
  X1702-429: The Infrared Counterparts   We report on the precise localization of the low mass X-ray binaries
X1624-490 and X1702-429 with the Chandra HRC-I. We determine the best positions
to be 16:28:02.825 -49:11:54.61 (J2000) and 17:06:15.314 -43:02:08.69 (J2000)
for X1624-490 and X1702-429, respectively, with the nominal Chandra positional
uncertainty of 0.6". We also obtained deep IR observations of the fields of
these sources in an effort to identify the IR counterparts. A single, faint
(Ks=18.3 +/- 0.1) source is visible inside the Chandra error circle of
X1624-490, and we propose this source as its IR counterpart. For X1702-429, a
Ks=16.5 +/- 0.07 source is visible at the edge of the Chandra error circle. The
brightness of both counterpart candidates is comparable to that of other low
mass X-ray binary IR counterparts when corrected for extinction and distance.

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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys