ASTRO: NGC 4204

I have some rather old stuff to process, mostly because the images were
plagued with some problems which made processing difficult. NGC 4204 in Coma
had an arc of light in the image, probably a reflection of a nearby star.
Also in the second night where I gathered data the dust specs did not match
the flatfields, even though I took the flat images in the same night.

Taken with a 10" Meade ACF at f/5.7 on a G11 mount, SXV-H9 camera, 33x5
minutes.

The picture can also be found at
http://ccd-astronomy.de/temp/4204-33x5gut.jpg

Stefan

interesting galaxy, nice job!

Stefan Lilge wrote:
I have some rather old stuff to process, mostly because the images were
plagued with some problems which made processing difficult. NGC 4204 in Coma
had an arc of light in the image, probably a reflection of a nearby star.
Also in the second night where I gathered data the dust specs did not match
the flatfields, even though I took the flat images in the same night.

Taken with a 10" Meade ACF at f/5.7 on a G11 mount, SXV-H9 camera, 33x5
minutes.

The picture can also be found at
http://ccd-astronomy.de/temp/4204-33x5gut.jpg

Stefan




--
John N. Gretchen III
http://www.tisd.net/~jng3

Stefan Lilge wrote:
I have some rather old stuff to process, mostly because the images were
plagued with some problems which made processing difficult. NGC 4204 in Coma
had an arc of light in the image, probably a reflection of a nearby star.
Also in the second night where I gathered data the dust specs did not match
the flatfields, even though I took the flat images in the same night.

Taken with a 10" Meade ACF at f/5.7 on a G11 mount, SXV-H9 camera, 33x5
minutes.

The picture can also be found at
http://ccd-astronomy.de/temp/4204-33x5gut.jpg

Stefan

You did very well with this faint one. Better than I'd expect from your
location in fact. I know what you mean about flats that don't quite
line up. Happens to me from time to time and I can't fathom why as they
are often spots on the CCD's window that can't move! Drives me nuts
when that happens. Moonlight does it to me every time.

It was on my to-do list for this past spring but clouds prevented me
from getting to it. I'm interested in a stream of faint blobs that run
from the north end of the galaxy to the east. I can't tell if they are
separate galaxies or condensations in a very weak tidal arm. Neither
NED nor SIMBAD have ID's for them. I want to go really deep and see
what is there. Hopefully next spring will cooperate.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".