Dr. Sudharshan Venkatesan Profile

Dr. Sudharshan Venkatesan

at Australian Astronomical Optics Macquarie Univ

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Author

Publications (10)

Proceedings Article | 18 July 2024 Presentation + Paper

Hector: performance of the new integral field spectrograph instrument for the Anglo-Australian Telescope

Julia Bryant, Sree Oh, Madusha Gunawardhana, Gabriella Quattropani, Gurashish Singh Bhatia, Joss Bland-Hawthorn, David Broderick, Rebecca Brown, Robert Content, Scott Croom, Fred Crous, Tony Farrell, Peter Gillingham, Ellen Houston, Jon Lawrence, Helen McGregor, Seong-Sik Minh, Mahesh Mohanan, Barnaby Norris, Matthew Owers, Naveen Pai, David Robertson, Will Saunders, Sam Vaughan, Sudharshan Venkatesan, Adeline Wang, Ross Zhelem, Jessica Zheng

Proceedings Volume 13096, 130960D (2024) https://doi.org/10.1117/12.3016340

KEYWORDS: Galactic astronomy, Spectrographs, Equipment, Telescopes, Stars, Magnetism, Astronomical imaging, Prisms, Spectral resolution

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Proceedings Article | 29 August 2022 Poster + Paper

Overall performance of AESOP: the 4MOST fibre positioner

Jurek Brzeski, David Adams, Gabriella Baker, Sufyan Baker, Rebecca Brown, Scott Case, Timothy Chin, Jack Coyne, Tony Farrell, Peter Gillingham, Ellen Houston, Urs Klauser, Yevgen Kripak, Nirmala Kunwar, Jon Lawrence, Slavko Mali, Wojtek Maslak, Helen McGregor, Rolf Muller, Vijay Nichani, Naveen Pai, Ellie O'brien, Will Saunders, Scott Smedley, Sudharshan Venkatesan, Lew Waller, Jahanzeb Zahoor, Jessica Zheng

Proceedings Volume 12184, 121846M (2022) https://doi.org/10.1117/12.2627900

KEYWORDS: Spine, Actuators, Fiber science, Telescopes, Tolerancing, Metrology, Galactic astronomy, Calibration, Assembly tolerances, Spectrographs

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Proceedings Article | 29 August 2022 Poster + Paper

AESOP, the 4MOST fibre positioner: engineering principles

Jurek Brzeski, Dave Adams, Gabriella Baker, Sufyan Baker, Rebecca Brown, Scott Case, Timothy Chin, Jack Coyne, Tony Farrell, James Gibson, Peter Gillingham, Ellen Houston, Urs Klauser, Yevgen Kripak, Nirmala Kunwar, Jon Lawrence, Slavko Mali, Wojtek Maslak, Helen McGregor, Rolf Muller, Vijay Nichani, Naveen Pai, Ellie O'brien, Will Saunders, Scott Smedley, Sudharshan Venkatesan, Lew Waller, Jahanzeb Zahoor, Jessica Zheng

Proceedings Volume 12184, 121846N (2022) https://doi.org/10.1117/12.2627903

KEYWORDS: Spine, Telescopes, Tolerancing, Assembly tolerances, Interfaces, Metrology, Kinematics, Assembly equipment, Sensors, Manufacturing

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

The Hector Instrument: optical design of the new higher-resolution spectrograph

Ross Zhelem, Robert Content, Will Saunders, Jon Lawrence, Jessica Zheng, Julia Bryant, Joss Bland-Hawthorn, David Robertson, Mahesh Mohanan, Sudharshan Venkatesan

Proceedings Volume 11447, 114478U (2020) https://doi.org/10.1117/12.2562634

KEYWORDS: Spectrographs, Optical design, Telescopes, Beam splitters, Optics manufacturing, Collimators, Cameras, Sensors, Optical fabrication, Robotics

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Proceedings Article | 13 December 2020 Presentation + Paper

Hector: a new multi-object integral field spectrograph instrument for the Anglo-Australian Telescope

Julia Bryant, Joss Bland-Hawthorn, Jon Lawrence, Barnaby Norris, Seong-Sik Min, Rebecca Brown, Adeline Wang, Gurashish Singh Bhatia, Will Saunders, Robert Content, Ross Zhelem, Sudharshan Venkatesan, Mahesh Mohanan, Peter Gillingham, Robert Patterson, David Robertson, Naveen Pai, Helen McGregor, Jessica Zheng, Sam Vaughan, Caroline Foster, Sergio Leon-Saval, Scott Croom

Proceedings Volume 11447, 1144715 (2020) https://doi.org/10.1117/12.2560309

KEYWORDS: Spectrographs, Galactic astronomy, Telescopes, Iterated function systems, Robotics, Environmental sensing, Stars, Spectral resolution, Kinematics, Prototyping

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Proceedings Article | 10 July 2018 Paper

Performance of the first production-ready actuators for the 4MOST-AESOP fiber positioner

Scott Smedley, Gabriella Baker, Sufyan Baker, Scott Case, Rebecca Brown, Jurek Brzeski, Peter Gillingham, Urs Klauser, Jon Lawrence, Slavko Mali, Rolf Muller, Vijay Nichani, Naveen Pai, Sudharshan Venkatesan, Lew Waller

Proceedings Volume 10702, 107027Z (2018) https://doi.org/10.1117/12.2312863

KEYWORDS: Spine, Actuators, Connectors, Manufacturing, Tolerancing, Structured optical fibers, Calibration

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Proceedings Article | 8 July 2018 Paper

AESOP: the 4MOST fiber positioner

Jurek Brzeski, Gabriella Baker, Sufyan Baker, Rebecca Brown, Scott Case, Tony Farrell, Peter Gillingham, Urs Klauser, Jon Lawrence, Slavko Mali, Rolf Muller, Vijay Nichani, Naveen Pai, Scott Smedley, Sudharshan Venkatesan, Lew Waller

Proceedings Volume 10702, 1070279 (2018) https://doi.org/10.1117/12.2310062

KEYWORDS: Kinematics, Actuators, Electronics, Tolerancing, Telescopes, Assembly tolerances, Adhesives

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Proceedings Article | 6 July 2018 Presentation + Paper

Hector: a modular integral field spectrograph instrument for the Anglo-Australian Telescope

Julia Bryant, Joss Bland-Hawthorn, Jon Lawrence, Will Saunders, Robert Content, Scott Croom, Sudharshan Venkatesan, Mahesh Mohanan, Rebecca Brown, Adeline Wang, Ross Zhelem, Peter Gillingham, Robert Patterson, Helen McGregor, Warrick Couch, Jesse van de Sande, Richard McDermid, Sergio Leon-Saval

Proceedings Volume 10702, 107021H (2018) https://doi.org/10.1117/12.2309893

KEYWORDS: Galactic astronomy, Spectral resolution, Spectrographs, Kinematics, Telescopes, Ionization, Robotics, Astronomy

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Based on the success of the SAMI integral field spectrograph (IFS) instrument on the Anglo-Australian Telescope (AAT) the capacity for large IFS nearby galaxy surveys on the AAT is being substantially expanded with a new instrument called Hector. The high filling-fraction imaging fibre bundles ‘hexabundles’ of the type used on SAMI, are being enlarged to cover up to 30-arcsec diameter. The aim is to reach two effective radii on most galaxies, where the galaxy rotation curve flattens and >75% of the specific angular momentum of disk galaxies is accounted for. Driven by the key science case, Hector will have a 1.3A spectral resolution, enabling high-order stellar kinematics to be measured on a larger fraction of galaxies than with any other IFS instrument. Hector will be on sky in 2019. The first module of Hector, Hector-I, will have 21 hexabundles and >42 sky fibres to observe 20 galaxies and a calibration star simultaneously. It consists of new blue and red-arm spectrographs that have been designed at the Australian Astronomical Observatory (AAO; now called AAO-Macquarie), coupled to the new hexabundles and robotic positioner from AAO-USydney (formerly the Sydney Astrophotonics Instrumentation Laboratory, SAIL) at Sydney University. A novel robotic positioning concept will compensate for varying telecentricity over the 2-degree-field of the AAT to recoup the 20% loss in light at the edge of the field. Hector-I will survey 15,000 galaxies. Additional modules in the future would result in 30,000 galaxies. Hector will take integral field spectroscopy on galaxies with z<0.15 in the 4MOST WAVES-North and WAVES-South∗ regions. The WAVES data, which will come later, will give the environment metrics neces- sary to relate how local and global environments influence galaxy growth through gas accretion, star formation and spins measured with Hector. The WALLABY ASKAP† survey will trace HI gas across the Hector fields, which in combination with Hector will give a complete view of gas accretion and star formation.

Proceedings Article | 6 July 2018 Paper

Sphinx: a massively multiplexed fiber positioner for MSE

Scott Smedley, Gabriella Baker, Rebecca Brown, James Gilbert, Peter Gillingham, Will Saunders, Andrew Sheinis, Sudharshan Venkatesan, Lew Waller

Proceedings Volume 10702, 107021M (2018) https://doi.org/10.1117/12.2310021

KEYWORDS: Spine, Actuators, Metrology, Telescopes, Calibration

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Proceedings Article | 4 August 2016 Paper

Hector: a new massively multiplexed IFU instrument for the Anglo-Australian Telescope

Julia Bryant, Joss Bland-Hawthorn, Jon Lawrence, Scott Croom, David Brown, Sudharshan Venkatesan, Peter Gillingham, Ross Zhelem, Robert Content, Will Saunders, Nicholas Staszak, Jesse van de Sande, Warrick Couch, Sergio Leon-Saval, Julia Tims, Richard McDermid, Adam Schaefer

Proceedings Volume 9908, 99081F (2016) https://doi.org/10.1117/12.2230740

KEYWORDS: Galactic astronomy, Spectrographs, Telescopes, Stars, Kinematics, Iterated function systems, Cameras, Glasses, Mirrors, Aspheric lenses

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Showing 5 of 10 publications

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