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| Object: |
NGC 6946 and SN2008S, Type IIn |
| Date, time: |
2008-03-04, 20:45-22.24 (UT) |
| Location: |
Sandvretens observatorium 30 km W Uppsala, Sweden |
| Instrument: |
Newton 0.444 m, f/4,4 |
| Detector: |
SBIG ST-7E (-35C), CFW-8, Schuler CBVR
Exposure: Clear 4x5min (bin1); B 3x5min (bin1); V 2x5min (bin1); R 5min (bin1) |
| Limit. mag.: |
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| Circumstances: |
Clear, rural sky, seeing 2.5" |
| Comments: |
Calibration in MaximDL and final retouch in Photoshop.
NGC 6946 is also known as "Fireworks Galaxy". Nine supernovae have been observed in this galaxy in the last 100 years. SN 1917A, 1939C, 1948B, 1968D, 1969P, 1980K, 2002hh, 2004et and 2008S. |
| Observer: |
Lars Hermansson |
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| Object: |
UGC 5979 and SN2007sv, Type blue variable |
| Date, time: |
2008-02-11, 20:29-23.14 (UT) |
| Location: |
Sandvretens observatorium 30 km W Uppsala, Sweden |
| Instrument: |
Newton 0.444 m, f/4,4 |
| Detector: |
SBIG ST-7E (-30C), CFW-8, Schuler ClearBVR
Exposure: Clear 38min (bin1); B 20min (bin2); V 10min (bin2); R 10min (bin2)
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| Limit. mag.: |
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| Circumstances: |
Clear, rural sky, seeing 1.5" |
| Comments: |
Calibration in MaximDL and final retouch in Photoshop.
2007sv is the star to the right within the galaxy. The one that is not so blue !?! This is UAA-member Gregor Duszanowicz´s fifth discovery.
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| Observer: |
Lars Hermansson |
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| Object: |
Powerpoint slideshow with many galaxies |
| Date, time: |
2007-04-21/22 |
| Location: |
Sandvreten Observatory |
| Instrument: |
45 cm Newton f/4.4 (T45) |
| Detector: |
SBIG ST-7E |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
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| Observer: |
Lars Hermansson |
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| Object: |
M108 Galaxy in Ursa Major |
| Date, time: |
2005-03-30, 22:10-23:27 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -35C, 0.9"/pix, 5x15min total 75min |
| Limit. mag.: |
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| Circumstances: |
Seeing ok. Raw FWHM 2.9 arcsec. |
| Comments: |
Five 15-minute exposures, added together using sigma clip
Mild unsharp mask sharpening blended in bright signal areas.
Curves contrast adjusted and slight colorisation.
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| Observer: |
Mauritz Andersson, Lars Hermansson |
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| Object: |
M101, a face on spiral galaxy in Ursa Major |
| Date, time: |
2004-04-10, 22:12-22:34 (UT) |
| Location: |
Sandvreten Observatory |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -35C, 0.9"/pix, 300+600 s |
| Limit. mag.: |
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| Circumstances: |
Clear, rural sky |
| Comments: |
Totally 15 minutes exposure time. Each component calibrated with dark (CCDOPS) and added in IRIS.
The picture is treated with mild DDP (IRIS) and contrast enhancement (Photoshop). |
| Observer: |
Lars Hermansson, Patrik Sundfor |
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| Object: |
M81, M82, NGC3077 in Ursa Major |
| Date, time: |
030422, 22:19-23:27 (UT) |
| Location: |
Sandvretens Observatorium, Uppsala, Sweden |
| Instrument: |
Newton 45 cm, f/3.9 (T45), prime-focus with coma-corrector (COFFI) |
| Detector: |
Kodak Ektachrome E200 (120-format), 15+30 min, off-axis autoguiding with ST-7E./td>
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| Limit. mag.: |
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| Circumstances: |
Clear, rural sky |
| Comments: |
Each negative is scanned in 2000 dpi with AGFA Duoscan two times
in perpendicular directions to reduce scanner-noise. The scans are then
stacked in Picture Window Pro (some problems here despite 50-point alignment
due to buckling of the film in the scanning process). 1 iteration R-L
deconvolution and DDP in AstroArt and final retouch in Photoshop. |
| Observer: |
L.Hermansson, G. Duszanowicz |
|
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| Object: |
Supernova SN2002bp in UGC 6332 |
| Date, time: |
2002-03-16, 00:00-00:19 (UT) |
| Location: |
Sandvreten Astronomical Observatory |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -35C, 0.9"/pix, 300+600s |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
Two exposures added for 15 minutes integrated exposure time.
Each component calibrated with dark and bias.
The picture is flattened, treated with Richardson-Lucy
deconvolution and DDP. Slight false colorization.
Telescope selfguided bycamera. |
| Observer: |
Lars Hermansson, Grzegorz Duszanowicz |
|
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| Object: |
Supernova SN2002bo in NGC 3190 (Hickson 44) |
| Date, time: |
2002-03-15, 22:28-22:50 (UT) |
| Location: |
Sandvreten Astronomical Observatory |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -33C, 0.9"/pix, 300+600s |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
Two exposures added for 15 minutes integrated exposure time.
Each component calibrated with dark and background flattening.
The picture is treated with Richardson-Lucy deconvolution and
DDP. Slight false colorization. Telescope selfguided by camera.
The small picture is linearily scaled to show the true brightness
of the supernova compared to the galaxy nucleus.
Image processing by Mauritz Andersson and Lars Hermansson. |
| Observer: |
Lars Hermansson, Grzegorz Duszanowicz |
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| Object: |
NGC 891, edge-on Sb-spiral in Andromeda |
| Date, time: |
2001-11-09, 22:32-23:02 (UT) |
| Location: |
Sandvreten Astronomical Observatory |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -40C, 0.9"/pix, 300+ 900 s |
| Limit. mag.: |
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| Circumstances: |
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| Comments: |
One 5 and one 15 min exposure added. Each component
calibrated with bias, dark. Result is gradient compensated.
The picture is treated with Richardson-Lucy deconvolution,
logarithmic scaling and contrast enhancement. |
| Observer: |
Johan Warell, Lars Hermansson |
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