Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: UX Tri: Period Change Discovered and Unchanged Strong Blazhko Effect
  Confirmed   New CCD observations of the RRab star UX Tri after JD = 2452234 show a change
of the main pulsation period. The period is now P = 0.4669046 +/- 0.0000006
[d]. The change is delta_P = - 1.72 x 10-5 [d] if compared with the value we
previously published in IBVS 5210. A strong Blazhko effect with unchanged
Blazhko period P_B = 43.7 +/- 0.1 [d] is confirmed by this paper. Light curve
particularities around Blazhko phase phi_B = 0.0 are discussed in detail. In
one observation (JD 2453617) related to Blazhko phase phi_B = 0.12 an
exceptionally pronounced "bump" of delta_m > -0.1 magnitude was observed at
pulsation phase phi = 0.71.

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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: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: alg-geom