Integrating the HERMES spectrograph for the AAT

Jeroen Heijmans*, Martin Asplund, Sam Barden, Michael Birchall, Daniela Carollo, Joss Bland Hawthorn, Jurek Brzeski, Scott Case, Vladimir Churilov, Matthew Colless, Robert Dean, Gayandhi De Silva, Tony J. Farrell, Kristin Fiegert, Ken Freeman, Luke Gers, Michael Goodwin, Doug Gray, Ron Heald, Anthony Heng & 29 others Damien Jones, Chiaki Kobayashi, Urs Klauser, Yuriy Kondrat, Jon Lawrence, Steve Lee, Darren Mathews, Don Mayfield, Stan Miziarski, Guy J. Monnet, Rolf Muller, Naveen Pai, Robert Patterson, Ed Penny, David Orr, Andrew Sheinis, Keith Shortridge, Scott Smedley, Greg Smith, Darren Stafford, Nicholas Staszak, Minh Vuong, Lewis Waller, Denis Whittard, Elisabeth Wylie De Boer, Pascal Xavier, Jessica Zheng, Ross Zhelem, Daniel Zucker

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

8 Citations (Scopus)

Abstract

The High Efficiency and Resolution Multi Element Spectrograph, HERMES is an optical spectrograph designed primarily for the GALAH, Galactic Archeology Survey, the first major attempt to create a detailed understanding of galaxy formation and evolution by studying the history of our own galaxy, the Milky Way1. The goal of the GALAH survey is to reconstruct the mass assembly history of the of the Milky way, through a detailed spatially tagged abundance study of one million stars in the Milky Way. The spectrograph will be based at the Anglo Australian Telescope (AAT) and be fed with the existing 2dF robotic fibre positioning system. The spectrograph uses VPH-gratings to achieve a spectral resolving power of 28,000 in standard mode and also provides a high resolution mode ranging between 40,000 to 50,000 using a slit mask. The GALAH survey requires a SNR greater than 100 aiming for a star brightness of V=14. The total spectral coverage of the four channels is about 100nm between 370 and 1000nm for up to 392 simultaneous targets within the 2 degree field of view. Current efforts are focused on manufacturing and integration. The delivery date of spectrograph at the telescope is scheduled for 2013. A performance prediction is presented and a complete overview of the status of the HERMES spectrograph is given. This paper details the following specific topics: The approach to AIT, the manufacturing and integration of the large mechanical frame, the opto-mechanical slit assembly, collimator optics and cameras, VPH gratings, cryostats, fibre cable assembly, instrument control hardware and software, data reduction.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy IV
Subtitle of host publicationProceedings of SPIE Vol. 8446
EditorsIan S. McLean, Suzanne K. Ramsay, Hideki Takami
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1-17
Number of pages17
Volume8446
ISBN (Print)9780819491473
DOIs
Publication statusPublished - 2012
EventGround-Based and Airborne Instrumentation for Astronomy IV - Amsterdam, Netherlands
Duration: 1 Jul 20126 Jul 2012

Other

OtherGround-Based and Airborne Instrumentation for Astronomy IV
CountryNetherlands
CityAmsterdam
Period1/07/126/07/12

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