Difference imaging photometry of blended gravitational microlensing events with a numerical kernel

M.D. Albrow; K. Horne; D.M. Bramich; P. Fouqua©; V.R. Miller; J.P. Beaulieu; C. Coutures; J. Menzies; Andrew Williams; V. Batista; D.P. Bennett; S. Brillant; A. Cassan; S. Dieters; D. Dominis Prester; J. Donatowicz; J. Greenhill; N. Kains; S.R. Kane; D. Kubas; J.B. Marquette; K.R. Pollard; K.C. Sahu; Y. Tsapras; J. Wambsganss; M. Zub

doi:10.1111/j.1365-2966.2009.15098.x

Difference imaging photometry of blended gravitational microlensing events with a numerical kernel

M.D. Albrow, K. Horne, D.M. Bramich, P. Fouqua©, V.R. Miller, J.P. Beaulieu, C. Coutures, J. Menzies, Andrew Williams, V. Batista, D.P. Bennett, S. Brillant, A. Cassan, S. Dieters, D. Dominis Prester, J. Donatowicz, J. Greenhill, N. Kains, S.R. Kane, D. KubasJ.B. Marquette, K.R. Pollard, K.C. Sahu, Y. Tsapras, J. Wambsganss, M. Zub

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Abstract

The numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source-star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference images. It is shown how the photometric reference flux need not be measured directly from the reference image but can be obtained from measurements of the difference images combined with the knowledge of the statistical flux uncertainties. The improved performance of the new algorithm, relative to isis2, is demonstrated.

Original language	English
Pages (from-to)	2099-2105
Journal	Monthly Notices of the Royal Astronomical Society
Volume	397
Issue number	4
DOIs	https://doi.org/10.1111/j.1365-2966.2009.15098.x
Publication status	Published - 2009

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Albrow, M. D., Horne, K., Bramich, D. M., Fouqua©, P., Miller, V. R., Beaulieu, J. P., Coutures, C., Menzies, J., Williams, A., Batista, V., Bennett, D. P., Brillant, S., Cassan, A., Dieters, S., Dominis Prester, D., Donatowicz, J., Greenhill, J., Kains, N., Kane, S. R., ... Zub, M. (2009). Difference imaging photometry of blended gravitational microlensing events with a numerical kernel. Monthly Notices of the Royal Astronomical Society, 397(4), 2099-2105. https://doi.org/10.1111/j.1365-2966.2009.15098.x

@article{8c78285be3794de582a8a0a59d49762f,

title = "Difference imaging photometry of blended gravitational microlensing events with a numerical kernel",

abstract = "The numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source-star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference images. It is shown how the photometric reference flux need not be measured directly from the reference image but can be obtained from measurements of the difference images combined with the knowledge of the statistical flux uncertainties. The improved performance of the new algorithm, relative to isis2, is demonstrated.",

author = "M.D. Albrow and K. Horne and D.M. Bramich and P. Fouqua{\textcopyright} and V.R. Miller and J.P. Beaulieu and C. Coutures and J. Menzies and Andrew Williams and V. Batista and D.P. Bennett and S. Brillant and A. Cassan and S. Dieters and {Dominis Prester}, D. and J. Donatowicz and J. Greenhill and N. Kains and S.R. Kane and D. Kubas and J.B. Marquette and K.R. Pollard and K.C. Sahu and Y. Tsapras and J. Wambsganss and M. Zub",

year = "2009",

doi = "10.1111/j.1365-2966.2009.15098.x",

language = "English",

volume = "397",

pages = "2099--2105",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

}

Albrow, MD, Horne, K, Bramich, DM, Fouqua©, P, Miller, VR, Beaulieu, JP, Coutures, C, Menzies, J, Williams, A, Batista, V, Bennett, DP, Brillant, S, Cassan, A, Dieters, S, Dominis Prester, D, Donatowicz, J, Greenhill, J, Kains, N, Kane, SR, Kubas, D, Marquette, JB, Pollard, KR, Sahu, KC, Tsapras, Y, Wambsganss, J & Zub, M 2009, 'Difference imaging photometry of blended gravitational microlensing events with a numerical kernel', Monthly Notices of the Royal Astronomical Society, vol. 397, no. 4, pp. 2099-2105. https://doi.org/10.1111/j.1365-2966.2009.15098.x

TY - JOUR

T1 - Difference imaging photometry of blended gravitational microlensing events with a numerical kernel

AU - Albrow, M.D.

AU - Horne, K.

AU - Bramich, D.M.

AU - Fouqua©, P.

AU - Miller, V.R.

AU - Beaulieu, J.P.

AU - Coutures, C.

AU - Menzies, J.

AU - Williams, Andrew

AU - Batista, V.

AU - Bennett, D.P.

AU - Brillant, S.

AU - Cassan, A.

AU - Dieters, S.

AU - Dominis Prester, D.

AU - Donatowicz, J.

AU - Greenhill, J.

AU - Kains, N.

AU - Kane, S.R.

AU - Kubas, D.

AU - Marquette, J.B.

AU - Pollard, K.R.

AU - Sahu, K.C.

AU - Tsapras, Y.

AU - Wambsganss, J.

AU - Zub, M.

PY - 2009

Y1 - 2009

N2 - The numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source-star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference images. It is shown how the photometric reference flux need not be measured directly from the reference image but can be obtained from measurements of the difference images combined with the knowledge of the statistical flux uncertainties. The improved performance of the new algorithm, relative to isis2, is demonstrated.

AB - The numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source-star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference images. It is shown how the photometric reference flux need not be measured directly from the reference image but can be obtained from measurements of the difference images combined with the knowledge of the statistical flux uncertainties. The improved performance of the new algorithm, relative to isis2, is demonstrated.

U2 - 10.1111/j.1365-2966.2009.15098.x

DO - 10.1111/j.1365-2966.2009.15098.x

M3 - Article

SN - 0035-8711

VL - 397

SP - 2099

EP - 2105

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Difference imaging photometry of blended gravitational microlensing events with a numerical kernel

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