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The Optical Gravitational Lensing Experiment. Optical Monitoring of the Gravitationally Lensed Quasar HE1104-1805 in 1997-2002

L. Wyrzykowski·A. Udalski·P. L. Schechter·O. Szewczyk·M. Szymanski·M. Kubiak·G. Pietrzynski·I. Soszynski·K. Zebrun
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Abstract

We present results of the long term monitoring of the gravitationally lensed quasar HE1104-1805. The photometric data were collected between August 1997 and January 2002 as a subproject of the OGLE survey. We determine the time delay in the light curves of images A and B of HE1104-1805 to be equal to 157+/-21 days with the variability in the image B light curve leading variability of the image A. The result is in excellent agreement with the earlier determination by Ofek and Maoz. OGLE photometry of HE1104-1805 is available to the astronomical community from the OGLE Internet archive.

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L. Wyrzykowski, A. Udalski, P. L. Schechter, O. Szewczyk, M. Szymanski, M. Kubiak, G. Pietrzynski, I. Soszynski, K. Zebrun. 2003-10-27. The Optical Gravitational Lensing Experiment. Optical Monitoring of the Gravitationally Lensed Quasar HE1104-1805 in 1997-2002. https://arxiv.org/abs/astro-ph/0310752

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