An Updated Ultraviolet Calibration for the Swift∕UVOT
A. A. BreeveldcUniversities Space Research Association, 10211 Wincopin Circle, Suite 500, Columbia, MD 21044V. La ParolacUniversities Space Research Association, 10211 Wincopin Circle, Suite 500, Columbia, MD 21044K. L. PagedCenter for Research and Exploration in Space Science and Technology, NASA/GSFC, Greenbelt, MD 20771P. W. A. RomingeSouthwest Research Institute, Department of Space Science, 6220 Culebra Rd, San Antonio, TX 78238N. P. M. KuinbNASA/Goddard Space Flight Center, Greenbelt, MD 20771M. J. PageaMullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UKJ. E. McEneryJ. L. RacusinN. GehrelseSouthwest Research Institute, Department of Space Science, 6220 Culebra Rd, San Antonio, TX 78238
2011en
ABI
Аннотация
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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