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Correcting spatial gradients: the case of Wide Field Imager photometry

Research output: Contribution to Journal/Magazine › Journal article

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Correcting spatial gradients: the case of Wide Field Imager photometry. / Koch, Andreas; Grebel, E. K.; Odenkirchen, Michael et al.
In: The Messenger, Vol. 115, 2004, p. 37-39.

Research output: Contribution to Journal/Magazine › Journal article

Harvard

Koch, A, Grebel, EK, Odenkirchen, M & Caldwell, JAR 2004, 'Correcting spatial gradients: the case of Wide Field Imager photometry', The Messenger, vol. 115, pp. 37-39. <https://www.eso.org/sci/publications/messenger/archive/no.115-mar04/messenger-no115-37-39.pdf>

APA

Koch, A., Grebel, E. K., Odenkirchen, M., & Caldwell, J. A. R. (2004). Correcting spatial gradients: the case of Wide Field Imager photometry. The Messenger, 115, 37-39. https://www.eso.org/sci/publications/messenger/archive/no.115-mar04/messenger-no115-37-39.pdf

Vancouver

Koch A, Grebel EK, Odenkirchen M, Caldwell JAR. Correcting spatial gradients: the case of Wide Field Imager photometry. The Messenger. 2004;115:37-39.

Author

Koch, Andreas ; Grebel, E. K. ; Odenkirchen, Michael et al. / Correcting spatial gradients : the case of Wide Field Imager photometry. In: The Messenger. 2004 ; Vol. 115. pp. 37-39.

Bibtex

@article{3b3f735fe3f54f2db1ef6659794443e1,
title = "Correcting spatial gradients: the case of Wide Field Imager photometry",
abstract = "We present a method to significantly reduce large-scale photometric variations seriously affecting imaging data from the Wide Field Imager (WFI). The primary source for these gradients is non-uniform illumination, which cannot be corrected by standard flatfielding techniques. Comparison of our observations with well-calibrated multi-colour photometry from the SDSS enabled us to characterize and quantify these variations and finally to model them using a second-order polynomial. Application of the model to our observations and an independent dataset consistently reduced the large-scale gradients and thus provides a generally valid and simple tool for improving WFI photometry.",
author = "Andreas Koch and Grebel, {E. K.} and Michael Odenkirchen and Caldwell, {John A. R.}",
year = "2004",
language = "English",
volume = "115",
pages = "37--39",
journal = "The Messenger",
issn = "0722-6691",

}

RIS

TY - JOUR

T1 - Correcting spatial gradients

T2 - the case of Wide Field Imager photometry

AU - Koch, Andreas

AU - Grebel, E. K.

AU - Odenkirchen, Michael

AU - Caldwell, John A. R.

PY - 2004

Y1 - 2004

N2 - We present a method to significantly reduce large-scale photometric variations seriously affecting imaging data from the Wide Field Imager (WFI). The primary source for these gradients is non-uniform illumination, which cannot be corrected by standard flatfielding techniques. Comparison of our observations with well-calibrated multi-colour photometry from the SDSS enabled us to characterize and quantify these variations and finally to model them using a second-order polynomial. Application of the model to our observations and an independent dataset consistently reduced the large-scale gradients and thus provides a generally valid and simple tool for improving WFI photometry.

AB - We present a method to significantly reduce large-scale photometric variations seriously affecting imaging data from the Wide Field Imager (WFI). The primary source for these gradients is non-uniform illumination, which cannot be corrected by standard flatfielding techniques. Comparison of our observations with well-calibrated multi-colour photometry from the SDSS enabled us to characterize and quantify these variations and finally to model them using a second-order polynomial. Application of the model to our observations and an independent dataset consistently reduced the large-scale gradients and thus provides a generally valid and simple tool for improving WFI photometry.

M3 - Journal article

VL - 115

SP - 37

EP - 39

JO - The Messenger

JF - The Messenger

SN - 0722-6691

ER -