Planetary Nebula M97

2003-02-03: 15 minute exposure (3x300s). Camera cooled to -25°C.

Spiral Galaxy M108 (NGC 3556) Revisited

This image was taken just two days after the previous one. The effects of much improved tracking and a longer exposure (40 minutes instead of 10) are clearly visible. Notice the difference in details of the dust in the galaxy.

2003-02-03: 40 minute exposure (4x600s). Camera cooled to -25°C.

Spiral Galaxy M108 (NGC 3556)

I am obviously having trouble with tracking.

2003-02-01: 10 minute exposure (5x120s). Camera cooled to -25°C.

SAO 24929 (7 Camelopardalis)

While I was looking for galaxy UGC3217 on the 2003-01-25 imaging session (which I didn't find), I took this overexposed image of SAO 24929. Nothing interesting to see here, but the only result of that session.

Galaxy NGC3631

Another binning test.

2003-01-18: 4 minute 2x2 binned exposure (4x60s). Camera cooled to -29°C.

Galaxy NGC 891

On my third imaging session I have been experimenting with binning. This image was made with 2x2 binning. Because the ST-7XE main CCD doesn't have many pixels to begin with, then resulting image is rather small. However, the sensitivity for each pixel is increased fourfold, and the well depth twofold. For LRGB imaging and photometry this will certainly have its uses. In this case, with normal binning I would only have reached the depth of this image after 42 minutes, instead of the 10.5 minutes used here.

2003-01-18: 630s 2x2 binned exposure (21x30s). Camera cooled to -30°C.

Mirach (β Andromeda)

I found this overexposed image of Mirach between my images of the 2003-01-18 imaging session. Nothing interesting to see here, except for the faint star at 11h relative to and close by Mirach, which is the magnitude 14.2 GSC 2286:693. After all, this is only a one second exposure.