Quote:
Originally Posted by Mickoid
Hi Rob, for what it's worth, this was taken on March the 10th.
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Thanks Michael. While there appears to be an extremely faint source just above the noise level, it's pretty much what you'd expect from the faint star that's very close to the position at this scale. The recorded brightness 'surge' took place between ASAS-SN's 15th Mar and 16th Mar images of the field but they only go down to about 15.5 mag or or so. From your image I reckon it would be safe to say that the nova (or whatever it is!) was less than mag 16.5 on 10 Mar. I think the 'progenitor' was in the mag 19s (they said it was a 12-magnitude outburst) and if nothing else your image shows that there was no significant brightening five days before the big outburst. Good stuff!
Cheers -