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

By M. Albrow, K. Horne, D. Bramich, P. Fouqué, V. R. Miller, J. Beaulieu, C. Coutures, J. Menzies, A. Williams, V. Batista and 16 more. 2009

175 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/8e6196787de1624e31587643a58f38f01d261b58

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In Astronomy and Astrophysics

1. D. Maoz
2. B. Gaudi
3. J. Menzies
4. K. Horne
5. K. Ulaczyk
6. C. Han
7. T. Sumi
8. J. Caldwell

In Atomic and Molecular Physics, and Optics

1. O. Pejcha

Citations in the corpus

• MOA-2009-BLG-387Lb: a massive planet orbiting an M dwarf (2011, methodology): “The SAAO, FCO, AO, Danish, Bronberg, and Wise data were reduced by MDA using the PYSIS3 software (Albrow et al. 2009).”
• A COLD NEPTUNE-MASS PLANET OGLE-2007-BLG-368Lb: Cold neptunes are common (2009, methodology): “0) (Albrow et al. 2009), partly based on ISIS (Alard & Lupton 1998), but using a numerical kernel (Bramich 2008).”