First light results from the Hermes spectrograph at the AAT

Andrew Sheinis, Sam Barden, Michael Birchall, Daniela Carollo, Joss Bland-Hawthorn, Jurek Brzeski, Scott Case, Russell Cannon, Vladimir Churilov, Warrick Couch, Robert Dean, Gayandhi De Silva, Valentina D'Orazi, Tony Farrell, Kristin Fiegert, Kenneth Freeman, Gabriella Frost, Luke Gers, Michael Goodwin, Doug Gray & 31 others Ron Heald, Jeroen Heijmans, Damien Jones, Stephan Keller, Urs Klauser, Yuriy Kondrat, Jon Lawrence, Steve Lee, Slavko Mali, Sarah Martell, Darren Mathews, Don Mayfield, Stan Miziarski, Rolf Muller, Naveen Pai, Robert Patterson, Ed Penny, David Orr, Keith Shortridge, Jeffrey Simpson, Scott Smedley, Greg Smith, Darren Stafford, Nicholas Staszak, Minh Vuong, Lewis Waller, Elizabeth Wylie De Boer, Pascal Xavier, Jessica Zheng, Ross Zhelem, Daniel Zucker

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

7 Citations (Scopus)
86 Downloads (Pure)

Abstract

The High Efficiency and Resolution Multi Element Spectrograph, HERMES is an facility-class optical spectrograph for the AAT. It is designed primarily for Galactic Archeology [21], the first major attempt to create a detailed understanding of galaxy formation and evolution by studying the history of our own galaxy, the Milky Way. 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. The spectrograph is based at the Anglo Australian Telescope (AAT) and is fed by the existing 2dF robotic fiber 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 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. Hermes has been commissioned over 3 runs, during bright time in October, November and December 2013, in parallel with the beginning of the GALAH Pilot survey starting in November 2013. In this paper we present the first-light results from the commissioning run and the beginning of the GALAH Survey, including performance results such as throughput and resolution, as well as instrument reliability. We compare the abundance calculations from the pilot survey to those in the literature.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy V
EditorsSuzanne K. Ramsey, Ian S. McLean, Hideki Takami
Place of PublicationWashington, DC
PublisherSPIE
Pages1-22
Number of pages22
Volume9147
ISBN (Electronic)9780819496157
DOIs
Publication statusPublished - 2014
EventGround-Based and Airborne Instrumentation for Astronomy V - Montreal, Canada
Duration: 22 Jun 201426 Jun 2014

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume9147
ISSN (Print)0277-786X

Other

OtherGround-Based and Airborne Instrumentation for Astronomy V
CountryCanada
CityMontreal
Period22/06/1426/06/14

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