Photometric calibration of the Swift ultraviolet/optical telescope

Poole, T.; Breeveld, A. A.; Page, M. J.; Parola, V. La; Holland, S. T.; Roming, P. W. A.; Kuin, N. P. M.; Brown, P. J.; Gronwall, C.; Hunsberger, S.; Koch, S.; Mason, K. O.; Schady, P.; Berk, Daniel Vanden; Blustin, A. J.; Boyd, Patricia T.; Broos, Patrick S.; Carter, M.; Chester, M.; Cucchiara, Antonino; Hancock, B.; Huckle, H.; Immler, S.; Ivanushkina, M.; Kennedy, T.; Marshall, F. E.; Morgan, A.; Pandey, S. B.; Pasquale, M. De; Smith, Phil; Still, M.

doi:10.1111/j.1365-2966.2007.12563.x

articleMonthly Notices of the Royal Astronomical SocietyDec 5, 2007BRONZE OA

Photometric calibration of the Swift ultraviolet/optical telescope

TPT. Poole AAA. A. Breeveld MJM. J. Page VLV. La Parola STS. T. Holland

University College London · Goddard Space Flight Center · +3 more institutions

Indexed inarxivcrossrefdoaj

Abstract

We present the photometric calibration of the Swift Ultraviolet/Optical Telescope (UVOT) which includes: optimum photometric and background apertures, effective area curves, colour transformations, conversion factors for count rates to flux and the photometric zero-points (which are accurate to better than 4 per cent) for each of the seven UVOT broad-band filters. The calibration was performed with observations of standard stars and standard star fields that represent a wide range of spectral star types. The calibration results include the position-dependent uniformity, and instrument response over the 1600-8000 operational range. Because the UVOT is a photon-counting instrument, we also discuss the effect of…

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Keywords

Physics
Optical telescope
Calibration
Telescope
Swift
Stars
Ultraviolet
Astrophysics

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