This one was observed at 700 million light years (5% of the way to the edge of the visible universe). In five-ten years, the 30 & 40 meter telescopes will be working, and we should be able to get this quality of data out another factor of 3 to 10 (assuming improvement in the detectors as well as surface area)... so yes. However part of the point here is that these are rare, and may not be the standard candle anyway. More study needs to be done on how to sort these things out. In the mean time, the double-degenerate type 1a SNs are generally the same brightness within a narrow range, so they don't give precision for individual events, but taken in statistical quantity, they still tell us a lot.
Originally Posted by TooMany
Forming opinions as we speak