GRAVITY+ Wide: towards hundreds of z ∼ 2 AGN, larger throughput and improved vibrational control

Maximilian Fabricius; Julien Woillez; Roberto Abuter; Guillaume Bourdarot; Pierre Bourget; Wolfgang Brandner; Amit Brara; Denis Defrère; Antonia Drescher; Frank Eisenhauer; Helmut Feuchtgruber; Robert Frahm; Reinhard Genzel; Stefan Gillessen; Frédéric Gonté; Vishaal Gopinath; Jonas Graf; Michael Hartl; Frank Haußmann; Sebastian F. Hönig; Matthew Horrobin; Paulo J. V. Garcia; Tilo Jilg; Laura Kreidberg; Romain Laugier; Jean-Baptiste Le Bouquin; Mari Lena Bolzer; Dieter Lutz; Nikhil More; Thomas Ott; Hakan Özdemir; Thibaut Paumard; Karine Perraut; Guy Perrin; Christian Rau; Christian Rehm; Jonas Sauter; Nicolas Schuhler; Daniel Schuppe; Jinyi Shangguan; Taro Shimizu; Christian Straubmeier; Matthias Subroweit; Sinem Uysal; Patrick Wessely; Felix Widmann; Ekkehard Wieprecht; Lukas Wimmer; Senol Yazici; Hagen Prowatke; Ralf Böttcher

doi:10.1117/12.3019984

28 August 2024 GRAVITY+ Wide: towards hundreds of z ∼ 2 AGN, larger throughput and improved vibrational control

Maximilian Fabricius, Julien Woillez, Roberto Abuter, Guillaume Bourdarot, Pierre Bourget, Wolfgang Brandner, Amit Brara, Denis Defrère, Antonia Drescher, Frank Eisenhauer, Helmut Feuchtgruber, Robert Frahm, Reinhard Genzel, Stefan Gillessen, Frédéric Gonté, Vishaal Gopinath, Jonas Graf, Michael Hartl, Frank Haußmann, Sebastian F. Hönig, Matthew Horrobin, Paulo J. V. Garcia, Tilo Jilg, Laura Kreidberg, Romain Laugier, Jean-Baptiste Le Bouquin, Mari Lena Bolzer, Dieter Lutz, Nikhil More, Thomas Ott, Hakan Özdemir, Thibaut Paumard, Karine Perraut, Guy Perrin, Christian Rau, Christian Rehm, Jonas Sauter, Nicolas Schuhler, Daniel Schuppe, Jinyi Shangguan, Taro Shimizu, Christian Straubmeier, Matthias Subroweit, Sinem Uysal, Patrick Wessely, Felix Widmann, Ekkehard Wieprecht, Lukas Wimmer, Senol Yazici, Hagen Prowatke, Ralf Böttcher

Author Affiliations +

Proceedings Volume 13095, Optical and Infrared Interferometry and Imaging IX; 130950B (2024) https://doi.org/10.1117/12.3019984
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

In the GRAVITY+ project, GRAVITY is presently undergoing a series of upgrades to enhance its performance, add wide field capability and thereby expand its sky coverage. Some aspects of these improvements have already been implemented and commissioned by the end of 2021, making them accessible to the community. The augmentation of sky coverage involves increasing the maximum angular separation between the celestial science object and the fringe tracking object from the previous 2 arcseconds (limited by the field of view of the VLTI) to 20 – 30 arcseconds (constrained by atmospheric conditions during observation). Phase 1 of GRAVITY+ Wide utilizes the earlier PRIMA Differential Delay Lines to compensate for the optical path length variation between the science and fringe tracking beams throughout an observation. In phase 2, we are upgrading the existing beam compressors (BC) to integrate optical path length difference compensation directly into the BC. This modification eliminates five optical reflections per beam, thereby enhancing the optical throughput of the VLTI–GRAVITY system and the bandwidth of the vibrational control. We will present the implementation of phase 2 and share preliminary results from our testing activities for GRAVITY+ Wide.

Conference Presentation

Citation Download Citation

Maximilian Fabricius, Julien Woillez, Roberto Abuter, Guillaume Bourdarot, Pierre Bourget, Wolfgang Brandner, Amit Brara, Denis Defrère, Antonia Drescher, Frank Eisenhauer, Helmut Feuchtgruber, Robert Frahm, Reinhard Genzel, Stefan Gillessen, Frédéric Gonté, Vishaal Gopinath, Jonas Graf, Michael Hartl, Frank Haußmann, Sebastian F. Hönig, Matthew Horrobin, Paulo J. V. Garcia, Tilo Jilg, Laura Kreidberg, Romain Laugier, Jean-Baptiste Le Bouquin, Mari Lena Bolzer, Dieter Lutz, Nikhil More, Thomas Ott, Hakan Özdemir, Thibaut Paumard, Karine Perraut, Guy Perrin, Christian Rau, Christian Rehm, Jonas Sauter, Nicolas Schuhler, Daniel Schuppe, Jinyi Shangguan, Taro Shimizu, Christian Straubmeier, Matthias Subroweit, Sinem Uysal, Patrick Wessely, Felix Widmann, Ekkehard Wieprecht, Lukas Wimmer, Senol Yazici, Hagen Prowatke, and Ralf Böttcher "GRAVITY+ Wide: towards hundreds of z ∼ 2 AGN, larger throughput and improved vibrational control", Proc. SPIE 13095, Optical and Infrared Interferometry and Imaging IX, 130950B (28 August 2024); https://doi.org/10.1117/12.3019984

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