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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
Brightness seemed to be flat.
I also received a SA100 grating that day, and decided to try it out. My first attempt at a spectrum is attached.
I have roughly guessed the calibration for wavelength and detector sensitivity based on example spectra around, so this is hardly exact, but I think it shows the features you would expect for the Ia supernova.
I must say there is a lot to learn in this field.
-Ivan
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