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We present cylindrically symmetric, static solutions of the Einstein fieldequations around a line singularity such that the energy momentum tensorcorresponds to infinitely thin photonic shells. Positivity of the energydensity of the thin shell and the line singularity is discussed. It is alsoshown that thick shells containing mostly radiation are possible by a numericalsolution.Comment: 15 pages, 9 figures, replaced with revised versio

TRAPPING PHOTONS BY A LINE SINGULARITY