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| Object: |
Virgo Cluster, Markarian chain - M86, M87, NGC4438, ... |
| Date, time: |
2000-03-29, 23:13 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newtonian 0.45m (T45) with Coma Corrector f/3.9 (COFFI) |
| Detector: |
Ektachrome E200 (6x6), 15 min, field 1.9x1.9 deg |
| Limit. mag.: |
|
| Circumstances: |
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| Comments: |
Positives digitally scanned and contrast enhanced |
| Observer: |
Johan Warell, Lars Hermansson, Mauritz Andersson |
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| Object: |
M96, M95, M105, NGC3384, ... |
| Date, time: |
2000-04-07, 21:24 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newtonian 0.45m (T45) with Coma Corrector f/3.9 (COFFI) |
| Detector: |
Ektachrome E200 (6x6), 20 min, field 1.9x1.9 deg |
| Limit. mag.: |
|
| Circumstances: |
|
| Comments: |
Positives digitally scanned and contrast enhanced |
| Observer: |
Lars Hermanson, Arvid Emtegren, Mauritz Andersson |
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| Object: |
M87 (A Giant Elliptical Galaxy) |
| Date, time: |
000307, 22:26 UT (300s),22:40 UT (600s) |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 (T45) |
| Detector: |
CCD (Sbig ST-7E) cooled to -30 degC, 0.9"/pixel, 300s + 600s exp |
| Limit. mag.: |
6.7 |
| Circumstances: |
Autotracking, seeing 3" |
| Comments: |
Dark subtraction (CCDOPS).
New image processing by Mauritz Andersson 000527
Deconvolution (Richadson-Lucy with positivity consraint) and Digital Developement Processing.
In the central region only the 300s exposure was used due to overexposure of the 600s. |
| Observer: |
Lars Hermansson, Johan Warell |
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| Object: |
Leo1 (Dwarf galaxy in the Local Group) |
| Date, time: |
000307, 20:39-21:35 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 (T45) |
| Detector: |
CCD (Sbig ST-7E) cooled to -30 degC, 0.9"/pixel, 2x600s exp |
| Limit. mag.: |
6.7 |
| Circumstances: |
Autotracking, seeing 3" |
| Comments: |
Dark subtraction (CCDOPS).
New image processing by Mauritz Andersson 000527
Deconvolution (Richadson-Lucy with positivity consraint) and Digital Developement Processing. |
| Observer: |
Lars Hermansson, Johan Warell |
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|
| Object: |
Leo1 (Dwarf galaxy in the Local Group) |
| Date, time: |
000307, 20:39-21:35 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 (T45) |
| Detector: |
CCD (Sbig ST-7E) cooled to -30 degC, 0.9"/pixel, 2x600s exp |
| Limit. mag.: |
6.7 |
| Circumstances: |
Autotracking, seeing 3" |
| Comments: |
Dark subtraction (CCDOPS). Two exposures added and contrast enhanced (Photoshop) |
| Observer: |
Lars Hermansson, Johan Warell |
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| Object: |
M51 (The Whirlpool Galaxy) |
| Date, time: |
000214, 23:41-23:44 UT |
| Location: |
Sandvreten Observatory |
| Instrument: |
Newton 0.45m f/4.5 (T45) |
| Detector: |
CCD (Sbig ST-7E) cooled to -35 degC, 0.9"/pixel |
| Limit. mag.: |
|
| Circumstances: |
Extremely poor! Image taken through clouds and 3/4 moon. |
| Comments: |
Test image only. Dark subtraction and contrast enhancement.
Flattening of backgrond by Johan Warell. |
| Observer: |
Lars Hermansson, Mauritz Andersson |
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| Object: |
M109 |
| Date, time: |
981211, 06:45:00 UT |
| Location: |
La Palma |
| Instrument: |
ALFOSC, Nordic Optical Telescope |
| Detector: |
CCD LORAL 2kx2k at -100.2degC, B+V+R filter, 100s+60s+40s |
| Limit. mag.: |
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| Circumstances: |
Seeing 1".0, astronomical dawn. |
| Comments: |
Bias- and sky background subtracted frames. Hot pixels removed.
3x3 pixels smoothing using an average-smoothing filter.
The resulting image is a sandwich of three images taken in Johnson B, V, and R filters. |
| Observer: |
Torgny Karlsson, Eva Örndahl |
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| Object: |
M101 |
| Date, time: |
981208, 06:30:00 UT |
| Location: |
La Palma |
| Instrument: |
ALFOSC, Nordic Optical Telescope |
| Detector: |
CCD LORAL 2kx2k at -100.1degC, B+V+R filter, 120s+60s+60s |
| Limit. mag.: |
|
| Circumstances: |
Seeing 2".0, astronomical dawn. |
| Comments: |
Bias- and sky background subtracted frames. Hot pixels removed.
3x3 pixels smoothing using an average-smoothing filter.
The resulting image is a sandwich of three images taken in Johnson B, V, and R filters. |
| Observer: |
Torgny Karlsson, Eva Örndahl |
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