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| Object: |
M97, The Owl Nebula |
| Date, time: |
2000-03-07 and 2010-02-11 |
| Location: |
Sandvreten Observatory, Sweden |
| Instrument: |
Newton 0.45m f/4.5, CFW-8 filter wheel with Schuler C,B,V,R,I filters. Total exp time 133 min. |
| Detector: |
SBIG ST-7E CCD-camera, -25C, 0.9"/pix. |
| Limit. mag.: |
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| Circumstances: |
Clear, rural sky, seeing 2-3"
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| Comments: |
The picture is assembled with LRGB technique. The L-component is taken through C filter 31 min binned 1x1. The colour components are B, V and R (30, 30 and 42 min respectively) also binned 1x1. All individual exposures are calibrated with bias, dark and flat. Aligning, combining, sharpening, stretching, cropping and LRGB in MaximDL/CCD. Contrast and final retouch in Photoshop. |
| Observer: |
Lars Hermansson, Patrik Sundfors, Johan Warell, Patrik Holmström |
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| Object: |
M42, The Orion Nebula |
| Date, time: |
2008-11-19, 02:23-04:06 |
| Location: |
Hågadalen, Uppsala |
| Instrument: |
Celestron C8-NGT, 20 cm Newton with 1 m focal length. |
| Detector: |
Canon 400D, ISO400, 17x60s stacked |
| Limit. mag.: |
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| Circumstances: |
Clear, windy.
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| Comments: |
Only 17 good exposures out of 60 due to wind. |
| Observer: |
Patrik Holmström |
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| Object: |
M57, The Ring Nebula |
| Date, time: |
2007-09-26, 20:50-22:16 (UT) |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5, CFW-8 filter wheel with Schuler C,B,V,R,I filters. |
| Detector: |
SBIG ST-7E CCD-camera, -25C, 0.9"/pix |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
The picture is assembled with LRGB technique. The L-component is taken thru C and R filters (10 and 30 min respectively) binned 1x1. The color components are B, V and R (12, 4 and 4 min respectively) binned 2x2. All individual exposures are calibrated with bias, dark and flat. Aligning, combining, sharpening, stretching, cropping and LRGB in MaximDL/CCD. Color saturation and final retouch in Photoshop. |
| Observer: |
Lars Hermansson and Mauritz Andersson |
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| Object: |
NGC 7008, Planetary Nebula in Cygnus |
| Date, time: |
2005-10-03, 20:33-22:42 (UT) |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 |
| Detector: |
SBIG ST-7E CCD-camera, CFW-8 filter wheel, -35C, 0.9"/pix, 56 min/td>
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| Limit. mag.: |
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| Circumstances: |
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| Comments: |
First colour picture with CCD and the T45. The picture is
assembled from a series of 2-minutes exposure to avoid
saturation of the bright star close to the nebula.
The individual components are calibrated with bias and dark,
assembled in MaximDL/CCD. Levels, curves and final retousch
in Photoshop. |
| Observer: |
Lars Hermansson |
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| Object: |
IC 1805 (cluster), Sh2-190 (nebula) |
| Date, time: |
041013, 20:50-21:20 UT |
| Location: |
Åkersberga, Sweden |
| Instrument: |
Olympus Zuiko 300/4,5;
Baader UV/IR block filter;
Lumicon H-alpha filter |
| Detector: |
CCD (Sbig ST-7E), -35 degC, 6"/pixel, 4x10 min exp; |
| Limit. mag.: |
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| Circumstances: |
Autoguiding by Gemini40 |
| Comments: |
Four 10-minute exposures grabbed with CCDSoft. Calibration
and combining in Maxim DL. Curves in Photoshop. |
| Observer: |
L.Hermansson, G.Duszanowicz |
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| Object: |
IC 5070 (The Pelican Nebula) |
| Date, time: |
041013, 20:00-20:30 UT |
| Location: |
Åkersberga, Sweden |
| Instrument: |
Olympus Zuiko 300/4,5;
Baader UV/IR block filter;
Lumicon H-alpha filter |
| Detector: |
CCD (Sbig ST-7E), -35 degC, 6"/pixel, 5x5 min exp; |
| Limit. mag.: |
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| Circumstances: |
Autoguiding by Gemini40 |
| Comments: |
Five 5-minute exposures grabbed with CCDSoft. Calibration
and combining in Maxim DL. Curves in Photoshop. |
| Observer: |
L.Hermansson, G.Duszanowicz |
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| Object: |
NGC 281 (The Pacman Nebula) |
| Date, time: |
041013, 21:34-22:28 UT |
| Location: |
Åkersberga, Sweden |
| Instrument: |
Olympus Zuiko 300/4,5 |
| Detector: |
CCD (Sbig ST-7E), -35 degC, 6"/pixel, 10 min exp; |
| Limit. mag.: |
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| Circumstances: |
Autoguiding by Gemini40 |
| Comments: |
Single 10 min exposures grabbed with CCDSoft. Calibration
in Maxim DL. Curves and final assembly in Photoshop. The
picture shows the effect of a Baader UV/IR block filter
when using a CCD-detector in combination with a tele-lens. |
| Observer: |
L.Hermansson, G.Duszanowicz |
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| Object: |
NGC 6960 (Western part of The Veil Nebula) |
| Date, time: |
041013, 18:29-18:42 UT |
| Location: |
Åkersberga, Sweden |
| Instrument: |
Zuiko 300/4,5;
Bader UV/IR block filter;
Lumicon H-alpha filter |
| Detector: |
CCD (Sbig ST-7E), -35 degC, 6"/pixel, 10x1 min exp; |
| Limit. mag.: |
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| Circumstances: |
Autotracking by Gemini40 |
| Comments: |
Ten 1-minute exposures grabbed with CCDSoft. Calibration
and combining in Maxim DL. Curves and 1,5x resampling in
Photoshop. Individual exposures reduced to 1 minute in order
not to saturate 52 Cygni too much. |
| Observer: |
L.Hermansson, G.Duszanowicz, M.Andersson |
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| Object: |
NGC 6992 (Eastern part of The Veil Nebula) |
| Date, time: |
041013, 19:17-19:49 UT |
| Location: |
Åkersberga, Sweden |
| Instrument: |
Zuiko 300/4,5;
Bader UV/IR block filter;
Lumicon H-alpha filter |
| Detector: |
CCD (Sbig ST-7E), -35 degC, 6"/pixel, 3x10 min exp; |
| Limit. mag.: |
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| Circumstances: |
Autotracking by Gemini40 |
| Comments: |
Three 10-minute exposures grabbed with CCDSoft. Calibration,
combining and DDP in Maxim DL. Curves and 1,5x resampling in Photoshop. |
| Observer: |
L.Hermansson, G.Duszanowicz, M.Andersson |
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| Object: |
M97, The Owl Nebula, in Ursa Major |
| Date, time: |
2004-03-08 00:52-01:02 (UT); 2004-04-10 21:22-21:47 (UT) |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 (T45) |
| Detector: |
SBIG ST-7E CCD-camera, -35 deg C, 0.9"/pix, 600+60+900 s |
| Limit. mag.: |
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| Circumstances: |
Clear, rural sky |
| Comments: |
Totally 26 minutes of exposure time from two nights
added in IRIS. Each component calibrated with dark
(CCDOPS). The picture is contrast enhanced in Photoshop. |
| Observer: |
Lars Hermansson, Patrik Sundfors, Johan Warell |
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