University of Tasmania
Browse

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

Version 2 2025-01-15, 01:05
Version 1 2023-05-16, 23:57
journal contribution
posted on 2025-01-15, 01:05 authored by MD Albrow, K Horne, DM Bramich, P Fouque, VR Miller, Jean-Philippe BeaulieuJean-Philippe Beaulieu, C Coutures, J Menzies, A Williams, V Batista, DP Bennett, S Brilliant, A Cassan, S Dieters, D Dominis Prester, J Donatowicz, JG Greenhill, N Kains, SR Kane, D Kubas, JB Marquette, KR Pollard, KC Sahu, Y Tsapras, J Wambsganss, M Zub
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.

History

Publication title

Monthly Notices of the Royal Astronomical Society

Volume

397

Issue

4

Pagination

2099-2105

ISSN

0035-8711

Department/School

Physics, School of Natural Sciences

Publisher

Wiley-Blackwell Publishing Inc

Publication status

  • Published

Place of publication

Malden, USA

Rights statement

The definitive published version is available online at: http://interscience.wiley.com

Socio-economic Objectives

280120 Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC