Revisiting the magnification of type Ia supernovae with SDSS |
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Authors: | Brice Ménard Neal Dalal † |
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Institution: | Institute for Advanced Study, Einstein Drive, Princeton NJ 08540, USA |
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Abstract: | We cross-correlate the sample of type Ia supernovae from Riess A. G. et al. with the SDSS DR2 photometric galaxy catalogue. In contrast to recent work, we find no detectable correlation between supernova magnitude and galaxy overdensity on scales ranging between 1 and 10 arcmin. Our results are in accord with theoretical expectations for gravitational lensing of supernovae by large-scale structure. Future supernova surveys such as SNAP will be capable of detecting unambiguously the predicted lensing signal. |
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Keywords: | gravitational lensing supernovae: general |
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