New GRAVITY+ observing modes to push for fainter and more precise observations

Antonia Drescher; Michaela Benthaus; Guillaume Bourdarot; Wolfgang Brandner; Denis Defrère; Frank Eisenhauer; Maximilian Fabricius; Helmut Feuchtgruber; Paulo Garcia; Reinhard Genzel; Stefan Gillessen; Frederic Gonte; Jonas Graf; Michael Hartl; Frank Haussmann; Sebastian Hönig; Laura Kreidberg; Jean-Baptiste Le Bouquin; Dieter Lutz; Felix Mang; Florentin Millour; Nikki More; Thomas Ott; Thibaut Paumard; Karine Perraut; Guy Perrin; Christian Rau; Jingyi Shangguan; Taro Shimizu; Christian Straubmeier; Matthias Subroweit; Sinem Uysal; Sebastiano von Fellenberg; Felix Widmann; Ekkehard Wieprecht; Julien Woillez; Senol Yazici

doi:10.1117/12.3018972

28 August 2024 New GRAVITY+ observing modes to push for fainter and more precise observations

Antonia Drescher, Michaela Benthaus, Guillaume Bourdarot, Wolfgang Brandner, Denis Defrère, Frank Eisenhauer, Maximilian Fabricius, Helmut Feuchtgruber, Paulo Garcia, Reinhard Genzel, Stefan Gillessen, Frederic Gonte, Jonas Graf, Michael Hartl, Frank Haussmann, Sebastian Hönig, Laura Kreidberg, Jean-Baptiste Le Bouquin, Dieter Lutz, Felix Mang, Florentin Millour, Nikki More, Thomas Ott, Thibaut Paumard, Karine Perraut, Guy Perrin, Christian Rau, Jingyi Shangguan, Taro Shimizu, Christian Straubmeier, Matthias Subroweit, Sinem Uysal, Sebastiano von Fellenberg, Felix Widmann, Ekkehard Wieprecht, Julien Woillez, Senol Yazici

Author Affiliations +

Proceedings Volume 13095, Optical and Infrared Interferometry and Imaging IX; 130950O (2024) https://doi.org/10.1117/12.3018972
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

The GRAVITY instrument has transformed the field of near-infrared interferometry and is redefining the limits of ground-based observations. In Galactic Center observations, this is shown by routinely achieving below 50 μas uncertainty on astrometric measurements within a 5-minute exposure and detecting stars fainter than 19th magnitude. Nevertheless, systematic effects are still limiting the instrument's performance. In this talk, I will introduce two observing modes to overcome these limitations: Pupil modulation to improve the astrometry and metrology attenuation to overcome SNR limitations. I will detail these two modes and show how significant the improvements are on examples of on-sky data.

Conference Presentation

Citation Download Citation

Antonia Drescher, Michaela Benthaus, Guillaume Bourdarot, Wolfgang Brandner, Denis Defrère, Frank Eisenhauer, Maximilian Fabricius, Helmut Feuchtgruber, Paulo Garcia, Reinhard Genzel, Stefan Gillessen, Frederic Gonte, Jonas Graf, Michael Hartl, Frank Haussmann, Sebastian Hönig, Laura Kreidberg, Jean-Baptiste Le Bouquin, Dieter Lutz, Felix Mang, Florentin Millour, Nikki More, Thomas Ott, Thibaut Paumard, Karine Perraut, Guy Perrin, Christian Rau, Jingyi Shangguan, Taro Shimizu, Christian Straubmeier, Matthias Subroweit, Sinem Uysal, Sebastiano von Fellenberg, Felix Widmann, Ekkehard Wieprecht, Julien Woillez, and Senol Yazici "New GRAVITY+ observing modes to push for fainter and more precise observations", Proc. SPIE 13095, Optical and Infrared Interferometry and Imaging IX, 130950O (28 August 2024); https://doi.org/10.1117/12.3018972

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available