Bubblelicious

A short window of opportunity opened up last night for blowing some bubbles. I managed to obtain several 20 minute exposures. Here is preliminary result. It will obviously need 3 - 4 hours to get a smooth background. Maybe later in the week.

305F3.8 Astrograph, QSI853WSG camera, 3x20 minutes H-a.

Rolando

P.S for the sharp eyed, can you spot the camera defects in this image and identify where they came from?

Attached Image:

Center crop at 100% resolution.

Rolando

Attached Image:

Roland Christen said:
...... can you spot the camera defects in this image and identify where they came from?

There are some odd radial flares on the bright stars in the corners.
The bottom 1/6 of the image looks 'noisier' than the rest of the image (readout error?).
The outer part of the brightest stars in the image show the dark V-shaped pincers that one often sees with the FSQ 106 (though I'm thinking that's not a camera defect. Lens spacers?)
That's a wonderful field of view for the Bubble.

dan kowall

Fabulous detail.

The bottom 1/5th of the image has had some readout problem.

I have seen that with my camera if I interrupt an exposure and then take another one.

Sometimes it shows part of the image as much whiter like half the image. Did you interrupt an exposure?

Other than that it looks pretty normal (flared stars in bottom left are the same thing).

There are slight halos around brighter stars and this is most likely the cover slip of the CCD causing mild reflections. Not really an issue I wouldn't think.

You can order some cameras without the coverslip (FLI and Apogee). Not sure if QSI does that.

On the other hand the cover slip protects the CCD from dust and stains which if they get on an
unprotected CCD I am told are very hard to handle. So a sealed CCD chamber would be required before you
would entertain that idea.

Greg.

Hubba-Bubba!

http://www.youtube.com/watch?v=r270ZGet0ck

Big bubbles...No troubles.