Quote:
Originally Posted by Placidus
You've convinced me that the large, faint patches of OIII at 10 o'clock and 11:30 and almost at the edge are real. Because of our smaller FOV I'd dismissed it as bad flats.
Best,
Mike
PS: I've just seen what you mean by a delicate flower-like nebula. The two faint patches I mentioned are petals. There are more. Never seen that before.
|
Thanks Mike. I just checked the O111 master again and it definitely shows that area as brightish compared to the rest of the frame.
Also I realised this is actually 4 cameras, not 3. The FLI Proline 16803/CDK17 for some Ha, The Trius 694/RHA Ha and O111, ST8300/RHA full set, Microline 8300/TEC180 full set. I think the total exposure time may be longer than I added up. There was a lot of data from the Trius, several nights worth and its about the most sensitive CCD there is in O111 at about 66%QE plus the F3.8 of the RHA it picks up a lot very quickly.
Greg.