| 30 | | || '''07.10.2016''' || '''Silvia Scheithauer''' || '''CIAO - Wavefront sensors for GRAVITY[[BR]]'''[[BR]]GRAVITY is a near-infrared instrument for the Very Large Telescope Interferometer (VLTI) at the ESO Paranal observatory in Chile. GRAVITY combines the light of all four 8,2m telescopes to mimic a virtual 130m telescope. The thereby possible, drastically increased sensivitity and resolution, however, can only be reached, if the image blur due to atmospheric turbulence above every single telescope is corrected by the real-time deformable mirrors of an adaptive optics system. Hence, GRAVITY has to provide not only the „Beam Combiner Instrument“ (BCI) in the VLTI-lab, but also four infrared wavefront sensors to analyse the atmospheric turbulences. These wavefront sensors are located in the four Coudé-rooms of the telescopes, therefore called „Coudé Infrared Adaptive Optics“ (CIAO). [[BR]][[BR]]The CIAO wavefront sensors were built under the responsibility of MPIA in close cooperation with ESO and the MPE-led GRAVITY consortium. While the BCI has been installed already in October 2015 on Paranal, the assembly of the four CIAO systems lasted from February to September 2016. Currently, the scientific commissioning of the complete GRAVITY instrument is ongoing.[[BR]][[BR]]One important scientific goal is the observation of objects in the direct vicinity of the black hole in the center of our Milky Way. In addition, GRAVITY will allow to study young stellar objects and shaped-up stars with an unprecedented sensitivity. In spring 2017, when the galactic center is again observable from Paranal, observations of the star „S2“ will start. The close fly-by of this star relative to the black hole will allow to test Einstein's general theory of relativity with an extreme accuracy. [[BR]][[BR]]Presentation: German [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2016S2/2016-10-07_CIAO.pdf Slides: English][[BR]]Questions: German, English || |
| | 30 | || '''07.10.2016''' || '''Silvia Scheithauer''' || '''CIAO - Wavefront sensors for GRAVITY[[BR]]'''[[BR]]GRAVITY is a near-infrared instrument for the Very Large Telescope Interferometer (VLTI) at the ESO Paranal observatory in Chile. GRAVITY combines the light of all four 8,2m telescopes to mimic a virtual 130m telescope. The thereby possible, drastically increased sensivitity and resolution, however, can only be reached, if the image blur due to atmospheric turbulence above every single telescope is corrected by the real-time deformable mirrors of an adaptive optics system. Hence, GRAVITY has to provide not only the „Beam Combiner Instrument“ (BCI) in the VLTI-lab, but also four infrared wavefront sensors to analyse the atmospheric turbulences. These wavefront sensors are located in the four Coudé-rooms of the telescopes, therefore called „Coudé Infrared Adaptive Optics“ (CIAO). [[BR]][[BR]]The CIAO wavefront sensors were built under the responsibility of MPIA in close cooperation with ESO and the MPE-led GRAVITY consortium. While the BCI has been installed already in October 2015 on Paranal, the assembly of the four CIAO systems lasted from February to September 2016. Currently, the scientific commissioning of the complete GRAVITY instrument is ongoing.[[BR]][[BR]]One important scientific goal is the observation of objects in the direct vicinity of the black hole in the center of our Milky Way. In addition, GRAVITY will allow to study young stellar objects and shaped-up stars with an unprecedented sensitivity. In spring 2017, when the galactic center is again observable from Paranal, observations of the star „S2“ will start. The close fly-by of this star relative to the black hole will allow to test Einstein's general theory of relativity with an extreme accuracy. [[BR]][[BR]]Presentation: German [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2016S2/2016-10-07_CIAO.pdf Slides: English][[BR]]Questions: German, English || |
