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2
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| Object: |
Comet C/2004 Q2 (Machholz) |
| Date, time: |
2005-01-03, 20:50-20:59 (UT) |
| Location: |
Sandvretens Observatorium |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -35C, 0.9"/pix, 4x60s |
| Limit. mag.: |
ZLM 6,5 |
| Circumstances: |
Clear, rural sky |
| Comments: |
Four exposures added centered on the central condensation
of the comet. Each component calibrated with dark.
The picture is treated with DDP to make the jets visible. |
| Observer: |
Lars Hermansson, Mauritz Andersson |
|
|
| Object: |
Comet C/2004 Q2 (Machholz |
| Date, time: |
2005-01-03, 20:50-20:59 (UT) |
| Location: |
Sandvretens Observatorium |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -35C, 0.9"/pix, 4x60s |
| Limit. mag.: |
ZLM 6,5 |
| Circumstances: |
Clear, rural sky |
| Comments: |
Four exposures added centered on the central condensation
of the comet. Each component calibrated with dark.
The picture is treated with DDP and Larson-Sekanina filter
to enhance jets within the coma. |
| Observer: |
Lars Hermansson, Mauritz Andersson |
|
|
| Object: |
C/2002 C1 (Ikeya-Zhang) |
| Date, time: |
020405, 21:00-21:25 (UT) |
| Location: |
Sandvreten Astronomical Observatory |
| Instrument: |
45 cm, f/3.9, prime-focus with comacorrector |
| Detector: |
Kodak Ektachrome E200 (120-format), 3 x 5 min autoguiding |
| Limit. mag.: |
|
| Circumstances: |
Clear |
| Comments: |
Each of three negatives is scanned in 1000 dpi with AGFA
Duoscan two times to reduce scanner-noise. The scans are then contrast
enhanced and added in Photoshop. |
| Observer: |
M.Andersson, A.Emtegren, L.Hermansson, P.Sundfors |
|
|
| Object: |
Comet C/2000 WM1 (LINEAR) |
| Date, time: |
2001-11-09, 00:00-00:25 (UT) |
| Location: |
Sandvreten Astronomical Observatory |
| Instrument: |
45 cm f/4.5 Newton |
| Detector: |
SBIG ST-7E CCD-camera, -40C, 0.9"/pix, 30+120+300 s |
| Limit. mag.: |
|
| Circumstances: |
Bright sky, humid, moonlight |
| Comments: |
Three exposures added centered on the central condensation
of the comet. Each component calibrated with bias, dark.
The picture is treated with Richardson-Lucy deconvolution
and DDP. |
| Observer: |
Lars Hermansson, Johan Warell |
|
|
| Object: |
Comet Hale-Bopp |
| Date, time: |
1997 April 2, UT 0127-0137 |
| Location: |
Sandvreten Observatory |
| Instrument: |
Nikon 300 mm f/4.5 |
| Detector: |
Ektachrome 400 Elite, exposure 10 min |
| Limit. mag.: |
|
| Circumstances: |
|
| Comments: |
Piggy-back on 0.45 m |
| Observer: |
Lars Hermansson, guiding by Johan Warell |
|
 |
| Object: |
Comet Hale-Bopp |
| Date, time: |
1997 April 2, UT 0009-0024 |
| Location: |
Sandvreten Observatory |
| Instrument: |
Nikon 180 mm f/4 |
| Detector: |
Ektachrome 400 Elite, exposure 15 min |
| Limit. mag.: |
|
| Circumstances: |
Aurora |
| Comments: |
|
| Observer: |
Lars Hermansson |
|
 |
| Object: |
Comet Hale-Bopp |
| Date, time: |
970402 |
| Location: |
Sandvreten Observatory |
| Instrument: |
35mm f/3.5 Chinon Zoom |
| Detector: |
Kodak PPF 400, exposure 5 min |
| Limit. mag.: |
|
| Circumstances: |
Aurora |
| Comments: |
C8 piggy-back |
| Observer: |
Mauritz Andersson |
|
 |
| Object: |
Comet Hale-Bopp |
| Date, time: |
970402 |
| Location: |
Sandvreten Observatory |
| Instrument: |
50mm f/2.8 Chinon |
| Detector: |
Kodak PPF 400, exposure 5 min |
| Limit. mag.: |
|
| Circumstances: |
Aurora |
| Comments: |
C8 piggy-back (New scan 981121) |
| Observer: |
Mauritz Andersson |
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