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arxiv: 1102.4717 · v1 · submitted 2011-02-23 · 🌌 astro-ph.IM

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An Updated Ultraviolet Calibration for the Swift/UVOT

A. A. Breeveld , W. Landsman , S. T. Holland , P. Roming , N. P. M. Kuin , M. J. Page
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classification 🌌 astro-ph.IM
keywords calibrationuvotfiltersswiftultravioletupdatedaccountsadditional
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We present an updated calibration of the Swift/UVOT broadband ultraviolet (uvw1, uvm2, and uvw2) filters. The new calibration accounts for the ~1% per year decline in the UVOT sensitivity observed in all filters, and makes use of additional calibration sources with a wider range of colours and with HST spectrophotometry. In this paper we present the new effective area curves and instrumental photometric zeropoints and compare with the previous calibration.

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