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Hi Ivan,
I'm puzzled by your B magniture being dimmer than the R and V. Given that we know, from spectra, visual and history that this SN has a very strong blue continuum I would have expected B<V<R, not the reverse.
> I took R, B and V photometry on the night of the 13th. Results were:
> R = 11.878 +/- 0.020
> V = 11.944 +/- 0.018
> B = 12.177 +/- 0.028
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