AR11040 14 Jan 2010

Paul Haese · #1 14-01-2010, 04:34 PM

Fairly reasonable seeing today. The group is getting a little larger and so I had to do a mosaic to get it all in.

Click here for image

Comments welcome

Dennis · #2 14-01-2010, 04:50 PM

Nice work Paul – does the 0.5 angstroms literally mean that only EM radiation of lambda 0.5Å is transmitted by these ‘scopes?

Also, does the seeing affect your imaging sessions as much as in visible light, or are they less sensitive to seeing at those narrow wavelengths?

The magnetic vortices (?) look spectacular!

Cheers

Dennis

sheeny (Al) · #3 14-01-2010, 05:04 PM

Lovely image Paul!

Dennis, the 0.5A refers to the bandwidth the filter lets through. The actual wavelength of light through a hydrogen alpha filter is about 6563A , so the frequencies in image would be about 6562.75A to 6563.25A.

My experience is that seeing is similar to any other scope.

Al.

RB (Andrew) · #4 14-01-2010, 06:02 PM

A very nice image indeed, well done Paul.

Matt Wastell (Matt) · #5 14-01-2010, 06:26 PM

Well done Paul!
Very nice indeed.

Dennis · #6 14-01-2010, 08:20 PM

Quote:

Originally Posted by sheeny

Dennis, the 0.5A refers to the bandwidth the filter lets through. The actual wavelength of light through a hydrogen alpha filter is about 6563A , so the frequencies in image would be about 6562.75A to 6563.25A.
My experience is that seeing is similar to any other scope.
Al.

Thanks Al, so it seems that there’s no free lunch in terms of immunity from poor seeing.

Cheers

Dennis

sheeny (Al) · #7 14-01-2010, 09:51 PM

Quote:

Originally Posted by Dennis

Thanks Al, so it seems that there’s no free lunch in terms of immunity from poor seeing.

Cheers

Dennis

No... Hubble's not exactly free is it?

Al.

telecasterguru (Frank) · #8 14-01-2010, 10:24 PM

Glad to see some sol action.

Paul Haese · #9 15-01-2010, 01:03 PM

Yep seeing is very similar. Best seeing is first thing in the morning and around 4pm during the afternoon. As the sunrises though seeing will be best.

Bandwidth is as Sheeny has suggested.

Thanks all for the comments.

Dennis · #10 15-01-2010, 01:20 PM

Thanks Paul – having seen the much tighter stars in (night time) astro photos using H alpha filters, I thought that there might have been some daytime benefit in terms of “cutting” through the seeing.

Cheers

Dennis

Quark (Trevor) · #11 15-01-2010, 05:04 PM

Very nice work Paul,
Love the resolution, it really does have a sort of 3D feel about it.

Regards
Trevor