[back] SLACS J1718+6424 (with gravitational lensing) in Draco [SLACS]
Click here to see a 200% crop/ Hier für einen 200%-Ausschnitt klicken
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Distance of the fourground (lensing) galaxy cluster: ~1200MLy. |
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60" |
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(c) 2013 All astro photo images are copyrighted. They may not be used or reproduced without explicit written permission from the authors. |
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About this Image / Über dieses Bild
| CCD: | SBIG STX16803 |
| Image Type, Orientation: | LRGB-Composite, North is at 4:30h |
| Exposure time: |
L: 12x900 sec., R: 5x900 sec., G: 6x900 sec., B: 8x900 sec., all 1x1 bin |
| Exposure date: |
June, 25th...July 6th 2011 |
| Location: | Skinakas Observatory at Crete, Greece, remote-controlled from Bad Arolsen/Germany |
| Filter: | ASTRODON 65mm Filterset for STX |
| Instrument: | Ganymed 60cm-Hypergraph in secondary focus (f=4938.3 mm) |
| Photographer: | Josef Pöpsel, Stefan Binnewies |
| Seeing (FWHM): | 1.1" |
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Remarks: |
Besides Abell 2218, this is our second effort to image gravitational lenses with Ganymed. In contrast to A2218 this one was a bit harder to detect. For more details and an HST Image see here: The Sloan Lens ACS Survey. I. A Large Spectroscopically Selected Sample of Massive Early-Type Lens Galaxies. Direkt link to the HST images: click here |
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Bemerkungen: |
Neben Abell 2218 ist dieses unsere zweiter Versuch, mit Ganymed Gravitations-Linsen abzubilden. Im Gegenteil zu A2218 war diese "etwas" schwieriger zu finden. Nähere Informationen (in englischer Sprache) sowie ein mit dem HST gemachtes Bild der Gegend sind hier (Bild: hier) zu finden. |
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