M3 - 16 March 09 - With bias frames

[jgs001]

Thanks very much to MartinB for his details on Bias frames. I've done some this morning for ISO1600 for this image, then threw the files into the previous stack of M3, but without the dark flats.

So 11x60s, 5 darks, 7 flats and 23 bias frames, stacked in DSS, Log Sqrt stretch in DSS. A small curve adjustment in GIMP, bit of high pass sharpen.

Thanks for looking, what do you think, better than my previous attempts ?

[MartinB]

A massive improvement John. A very sharp image with a smooth background

[jgs001]

Thanks Martin, and thanks again for the info and help on Bias frames.