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| Object: |
M27, The Dumbbell Nebula |
| Date, time: |
000922, 23:52 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m, F/4.5 |
| Detector: |
CCD (SBIG ST-7E), 600s, -25degC, 0.9"/pix,
O-III filter (Lumicon). |
| Limit. mag.: |
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| Circumstances: |
Selfguiding by CCD-camera |
| Comments: |
Image dark subtracted (CCDOPS) and treated with very light
Wavelet-filtering, Digital Development Processing and
Richardson-Lucy deconvolution (IRIS). |
| Observer: |
Lars Hermansson |
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| Object: |
M57, The Ring Nebula |
| Date, time: |
2000-09-04, 22:44-23:11 (UT) |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5, Paracorr |
| Detector: |
Ccd Sbig ST-7E, -20 deg C, 0.8"/pix, H-alpha filter. |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
Composite of 3 exposures (60s, 300s and 900s) (CCDOPS).
The picture is contrast enhanced, treated with unsharp mask
and bilinearily resampled (Photoshop). |
| Observer: |
Lars Hermansson |
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| Object: |
M27, The Dumbbell Nebula |
| Date, time: |
000905, 22:23 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m, F/4.5, coma corrector (Paracorr) |
| Detector: |
CCD (SBIG ST-7E), 300s, -25degC, 0.8"/pix, H-alpha filter (Lumicon). |
| Limit. mag.: |
|
| Circumstances: |
Selfguiding by CCD |
| Comments: |
Image dark subtracted (CCDOPS) and contrast
enhanced (Photoshop). |
| Observer: |
Lars Hermansson |
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| Object: |
NGC281 (The Pacman Nebula) |
| Date, time: |
2000-01-09, 20:17 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newtonian 0.45m (T45) with Coma Corrector f/3.9 (COFFI) |
| Detector: |
Ektachrome E200 (6x6), 10 min, field 1.9x1.9 deg |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
Positives digitally scanned and contrast enhanced.
Unsharp stars in the middle is due to buckeling of film. |
| Observer: |
Johan Warell, Lars Hermansson, Mauritz Andersson |
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| Object: |
NGC7000 (North American Nebula) |
| Date, time: |
2000-01-09, 21:17 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newtonian 0.45m (T45) with Coma Corrector f/3.9 (COFFI) |
| Detector: |
Ektachrome E200 (6x6), 10 min, field 1.9x1.9 deg |
| Limit. mag.: |
|
| Circumstances: |
|
| Comments: |
Positives digitally scanned and contrast enhanced. |
| Observer: |
Johan Warell, Lars Hermansson, Mauritz Andersson |
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| Object: |
NGC6543, The Cat Eye Nebula |
| Date, time: |
2000-03-24/25, 23:52-00:13 (UT) |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 |
| Detector: |
Ccd Sbig ST-7E, -30degC, 0.9"/pix |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
Left: Composite of 3 exposures (30,120,300s). Note traces of faint nebulosity. Right: Single 120s exposure. The inset is cropped and bilinearily resampled x4. |
| Observer: |
Lars Hermansson, Johan Warell |
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| Object: |
M97 (The Owl Nebula) |
| Date, time: |
000308, 00:52-01:02 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 (T45) |
| Detector: |
CCD (Sbig ST-7E) cooled to -30 degC, 0.9"/pixel, 600s exp |
| Limit. mag.: |
6.7 |
| Circumstances: |
Autotracking, seeing 3" |
| Comments: |
Dark subtraction (CCDOPS) and contrast enhancement (Photoshop). |
| Observer: |
Lars Hermansson, Johan Warell |
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| Object: |
M1 (The Crab Nebula) |
| Date, time: |
000203, 20:05-20:10, 20:38-20:58 |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 (T45) |
| Detector: |
CCD (Sbig ST-7E) cooled to -30 degC, 0.9"/pixel |
| Limit. mag.: |
|
| Circumstances: |
Haze |
| Comments: |
First picture taken with automatic tracking. Composite of one 5 and one 20 minute exposure. Dark subtraction and contrast enhancement. Flattening of backgrond. |
| Observer: |
Johan Warell, Lars Hermansson, Mauritz Andersson |
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