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An Updated Ultraviolet Calibration for the Swift/UVOT

By A. A. Breeveld, W. Landsman, S. T. Holland, P. Roming, N. P. M. Kuin and M. J. Page


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.Comment: 4 pages, 3 figures, 2 tables. Presented at GRB 2010 symposium, Annapolis, November 2010 to be published in American Institute of Physics Conference Serie

Topics: Astrophysics - Instrumentation and Methods for Astrophysics
Year: 2011
DOI identifier: 10.1063/1.3621807
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