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NGC 3079 (UMa) and double-quasar QSO 0957 +561A & B
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| Date/Site: |
March 18., 2009, AAR-observatory in Presberg |
Exposure/
Filter: |
L: 4 x 5 minutes (-25°C) |
| Camera: |
SBIG ST10XME |
Optics/
Instrument: |
13"-Newton on the Gemini 41 Observatory mount, Baader coma-corrector |
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focusing with RoboFocus and MaximDL |
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Deblooming, darks, alignment and stacking: MaximDL,
levels and curves: Photoshop CS |
Remarks: good tranparency, no wind, -2°C, hoar frost.
The famous double-quasar QSO 0957 +561A & B consists of two components with 17.1 and 17.4 mag with a separation of 6". It was the first object where the gravitational lensing effect could be shown on a quasar.
Version with object-identification.
Click on the image for a larger version
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© Friedhelm Hübner, last revision: 23.07.2025