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Posts Made By: John Dwyer

June 7, 2011 12:19 AM Forum: CCD Imaging and Processing/Deep Sky

Supernova in M51!

Posted By John Dwyer

I happened to get it on 5/31 and 6/1 also by random chance. Of course like an idiot I did not even realize it until yesterday when I started putting the subs together.

C11 f6.3 (or therebouts) ST2000xm from Maryland

5/31/11 07:09 UTC (2:09am est) single 15min sub bin 1x1 Lum - pre-supernova:
http://imageshack.us/f/35/tmp3785f.jpg/

6/1/11 04:24 UTC (5/31 11:24 est) single 15min sub bin 1x1 Lum:
http://imageshack.us/f/696/bm51supernova2011053111.jpg/

A quickie CCDsoft color combine 4x15 L bin1x1 ;6x5 RGB bin2x2 from the 2 nights:
http://imageshack.us/f/36/cm5120110531.jpg/

John D.

February 17, 2012 06:36 PM Forum: Reflectors

Dust cover for my mirror

Posted By John Dwyer

Nice Find.

I have a 15" mirror and have been looking for a cover forever. Any idea what the actual internal diameter is? I notice they come in 1" increments and am wondering whether a 15" or a 16" would be appropriate.

Thanks,

John D
Maryland