Quote:
Originally Posted by Glenpiper
My latest low resolution spectra (below), taken last night (10 Nov) from urban Melbourne shows the strong 'blue' component ... fairly typical of a type 1a.
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Bernard, thanks for posting the spectrum. Looks like good work.
From my reading, I understand the the strong emission in the blue end for type Ia at this point in its evolution is due to the decay of Nickel. This will be the case around peak brightness, as we are seeing the shell.
Weeks and months down the track, the shell will have expanded to transparency, and we will then see the core, which will be less blue.
Quote:
Originally Posted by SkyViking
Thanks for the update Ivan. Impressive with a 11.90 magnitude! If that's in R then I assume B must be even brighter?
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I measured the R-band brightness again last night, it was 11.97 +/- 0.03 .. So possibly flat, possibly dimming. However there were thin clouds, so the accuracy can be affected. I think we will need another data point or two before deciding where the peak is.
I have only been measuring R so far, but I think Terry has measured other bands so may be able to give us a comparison.
-Ivan