Further calibration of the Swift ultraviolet/optical telescope

A.~A. Breeveld; P.~A. Curran; E.~A. Hoversten; S. Koch; W. Landsman; F.~E. Marshall; M.~J. Page; T.~S. Poole; P. Roming; P.~J. Smith; M. Still; V. Yershov; A.~J. Blustin; P.~J. Brown; C. Gronwall; S.~T. Holland; N.~P.~M. Kuin; K. McGowan; S. Rosen; P. Boyd; P. Broos; M. Carter; M.~M. Chester; B. Hancock; H. Huckle; S. Immler; M. Ivanushkina; T. Kennedy; K.~O. Mason; A.~N. Morgan; S. Oates; M. de Pasquale; P. Schady; M. Siegel; D. vanden Berk

doi:10.1111/j.1365-2966.2010.16832.x

Further calibration of the Swift ultraviolet/optical telescope

A.~A. Breeveld, P.~A. Curran, E.~A. Hoversten, S. Koch, W. Landsman, F.~E. Marshall, M.~J. Page, T.~S. Poole, P. Roming, P.~J. Smith, M. Still, V. Yershov, A.~J. Blustin, P.~J. Brown, C. Gronwall, S.~T. Holland, N.~P.~M. Kuin, K. McGowan, S. Rosen, P. BoydP. Broos, M. Carter, M.~M. Chester, B. Hancock, H. Huckle, S. Immler, M. Ivanushkina, T. Kennedy, K.~O. Mason, A.~N. Morgan, S. Oates, M. de Pasquale, P. Schady, M. Siegel, D. vanden Berk

Department of Physics

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231 Citations (SciVal)

Abstract

The Ultraviolet/Optical Telescope (UVOT) is one of three instruments onboard the Swift observatory. The photometric calibration has been published, and this paper follows up with details on other aspects of the calibration including a measurement of the point spread function with an assessment of the orbital variation and the effect on photometry. A correction for large-scale variations in sensitivity over the field of view is described, as well as a model of the coincidence loss which is used to assess the coincidence correction in extended regions. We have provided a correction for the detector distortion and measured the resulting internal astrometric accuracy of the UVOT, also giving the absolute accuracy with respect to the International Celestial Reference System. We have compiled statistics on the background count rates, and discuss the sources of the background, including instrumental scattered light. In each case, we describe any impact on UVOT measurements, whether any correction is applied in the standard pipeline data processing or whether further steps are recommended.

Original language	English
Pages (from-to)	1687-1700
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	406
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2966.2010.16832.x
Publication status	Published - 1 Aug 2010

Keywords

instrumentation: detectors, instrumentation: photometers, astrometry, ultraviolet: general, Astrophysics - Instrumentation and Methods for Astrophysics

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10.1111/j.1365-2966.2010.16832.x

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Breeveld, A. A., Curran, P. A., Hoversten, E. A., Koch, S., Landsman, W., Marshall, F. E., Page, M. J., Poole, T. S., Roming, P., Smith, P. J., Still, M., Yershov, V., Blustin, A. J., Brown, P. J., Gronwall, C., Holland, S. T., Kuin, N. P. M., McGowan, K., Rosen, S., ... vanden Berk, D. (2010). Further calibration of the Swift ultraviolet/optical telescope. Monthly Notices of the Royal Astronomical Society, 406(3), 1687-1700. https://doi.org/10.1111/j.1365-2966.2010.16832.x

Breeveld, AA, Curran, PA, Hoversten, EA, Koch, S, Landsman, W, Marshall, FE, Page, MJ, Poole, TS, Roming, P, Smith, PJ, Still, M, Yershov, V, Blustin, AJ, Brown, PJ, Gronwall, C, Holland, ST, Kuin, NPM, McGowan, K, Rosen, S, Boyd, P, Broos, P, Carter, M, Chester, MM, Hancock, B, Huckle, H, Immler, S, Ivanushkina, M, Kennedy, T, Mason, KO, Morgan, AN, Oates, S, de Pasquale, M, Schady, P, Siegel, M & vanden Berk, D 2010, 'Further calibration of the Swift ultraviolet/optical telescope', Monthly Notices of the Royal Astronomical Society, vol. 406, no. 3, pp. 1687-1700. https://doi.org/10.1111/j.1365-2966.2010.16832.x

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abstract = "The Ultraviolet/Optical Telescope (UVOT) is one of three instruments onboard the Swift observatory. The photometric calibration has been published, and this paper follows up with details on other aspects of the calibration including a measurement of the point spread function with an assessment of the orbital variation and the effect on photometry. A correction for large-scale variations in sensitivity over the field of view is described, as well as a model of the coincidence loss which is used to assess the coincidence correction in extended regions. We have provided a correction for the detector distortion and measured the resulting internal astrometric accuracy of the UVOT, also giving the absolute accuracy with respect to the International Celestial Reference System. We have compiled statistics on the background count rates, and discuss the sources of the background, including instrumental scattered light. In each case, we describe any impact on UVOT measurements, whether any correction is applied in the standard pipeline data processing or whether further steps are recommended.",

keywords = "instrumentation: detectors, instrumentation: photometers, astrometry, ultraviolet: general, Astrophysics - Instrumentation and Methods for Astrophysics",

author = "A.~A. Breeveld and P.~A. Curran and E.~A. Hoversten and S. Koch and W. Landsman and F.~E. Marshall and M.~J. Page and T.~S. Poole and P. Roming and P.~J. Smith and M. Still and V. Yershov and A.~J. Blustin and P.~J. Brown and C. Gronwall and S.~T. Holland and N.~P.~M. Kuin and K. McGowan and S. Rosen and P. Boyd and P. Broos and M. Carter and M.~M. Chester and B. Hancock and H. Huckle and S. Immler and M. Ivanushkina and T. Kennedy and K.~O. Mason and A.~N. Morgan and S. Oates and {de Pasquale}, M. and P. Schady and M. Siegel and {vanden Berk}, D.",

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doi = "10.1111/j.1365-2966.2010.16832.x",

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AU - Breeveld, A.~A.

AU - Curran, P.~A.

AU - Hoversten, E.~A.

AU - Koch, S.

AU - Landsman, W.

AU - Marshall, F.~E.

AU - Page, M.~J.

AU - Poole, T.~S.

AU - Roming, P.

AU - Smith, P.~J.

AU - Still, M.

AU - Yershov, V.

AU - Blustin, A.~J.

AU - Brown, P.~J.

AU - Gronwall, C.

AU - Holland, S.~T.

AU - Kuin, N.~P.~M.

AU - McGowan, K.

AU - Rosen, S.

AU - Boyd, P.

AU - Broos, P.

AU - Carter, M.

AU - Chester, M.~M.

AU - Hancock, B.

AU - Huckle, H.

AU - Immler, S.

AU - Ivanushkina, M.

AU - Kennedy, T.

AU - Mason, K.~O.

AU - Morgan, A.~N.

AU - Oates, S.

AU - de Pasquale, M.

AU - Schady, P.

AU - Siegel, M.

AU - vanden Berk, D.

PY - 2010/8/1

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N2 - The Ultraviolet/Optical Telescope (UVOT) is one of three instruments onboard the Swift observatory. The photometric calibration has been published, and this paper follows up with details on other aspects of the calibration including a measurement of the point spread function with an assessment of the orbital variation and the effect on photometry. A correction for large-scale variations in sensitivity over the field of view is described, as well as a model of the coincidence loss which is used to assess the coincidence correction in extended regions. We have provided a correction for the detector distortion and measured the resulting internal astrometric accuracy of the UVOT, also giving the absolute accuracy with respect to the International Celestial Reference System. We have compiled statistics on the background count rates, and discuss the sources of the background, including instrumental scattered light. In each case, we describe any impact on UVOT measurements, whether any correction is applied in the standard pipeline data processing or whether further steps are recommended.

AB - The Ultraviolet/Optical Telescope (UVOT) is one of three instruments onboard the Swift observatory. The photometric calibration has been published, and this paper follows up with details on other aspects of the calibration including a measurement of the point spread function with an assessment of the orbital variation and the effect on photometry. A correction for large-scale variations in sensitivity over the field of view is described, as well as a model of the coincidence loss which is used to assess the coincidence correction in extended regions. We have provided a correction for the detector distortion and measured the resulting internal astrometric accuracy of the UVOT, also giving the absolute accuracy with respect to the International Celestial Reference System. We have compiled statistics on the background count rates, and discuss the sources of the background, including instrumental scattered light. In each case, we describe any impact on UVOT measurements, whether any correction is applied in the standard pipeline data processing or whether further steps are recommended.

KW - instrumentation: detectors, instrumentation: photometers, astrometry, ultraviolet: general, Astrophysics - Instrumentation and Methods for Astrophysics

U2 - 10.1111/j.1365-2966.2010.16832.x

DO - 10.1111/j.1365-2966.2010.16832.x

M3 - Article

SN - 0035-8711

VL - 406

SP - 1687

EP - 1700

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Further calibration of the Swift ultraviolet/optical telescope

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Keywords

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