An updated ultraviolet calibration for the Swift/UVOT
AA Breeveld, W Landsman, ST Holland… - AIP Conference …, 2011 - pubs.aip.org
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.
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.