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Near-IR search for lensed supernovae behind galaxy clusters II. First detection and future prospects

机译:Near-IR search for lensed supernovae behind galaxy clusters II. First detection and future prospects

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摘要

Aims. Powerful gravitational telescopes in the form of massive galaxy clusters can be used to enhance the light collecting power overa limited field of view by about an order of magnitude in flux. This effect is exploited here to increase the depth of a survey for lensedsupernovae at near-IR wavelengths. Methods. We present a pilot supernova search programme conducted with the ISAAC camera at VLT. Lensed galaxies behind the massive clusters A1689, A1835, and AC114 were observed for a total of 20 h divided into 2, 3, and 4 epochs respectively, separated by approximately one month to a limiting magnitude J 10 lensed supernova lightcurves per year, where type Ia supernovae would constitute about half of the expected sample.

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