Quote:
Originally Posted by AstroJunk
Interesting. I have pefectly exposed footage of that area from two telescopes and have yet to find an event. More to the point, that's not where the impact was due to occur according to the charts!
EDIT: 18:25:07 +/- a couple of seconds - Steven Lee from the AAO just emailed me.
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Jonathan,
Looks like, from the text below the AAT result that they went for a
time exposure of 0.6s or 1 sec maybe.
Edit : from the AAT link: 1sec exposures at 0.6sec intervals,
Narrowband filter with camera sensitive in the IR.
Why didn't I leave off the IR filter stoopid!
I think that might be the key to it <slaps forehead>!
I decided to go Prime/Newt focus with a 1500 FL and DSI II chip.
Pretty wide field I know but I didn't want to be doing any last
minute frantic adjusments if something got bumped at the last
minute.
I also was at a 0.001sec shutter speed to keep the terminator
at a reasonable exposure. That might have been my mistake.
Because they went time exposure (maybe), they would get an
event recorded if it happened over the 1 sec exposure whereas
my software probably missed it while cycling from download frame
to take the next exposure( The DSI can't do fast frame rate like a
webcam can.....2 frame per second at best.
A learning experience
I've histo'd all my frames around the 18:25 mark and...nothing
Steve