28 July 2014 Achieving decameter velocity precision with a multi-object spectrograph
Author Affiliations +
Fiber-fed multi-object spectrographs have proven to be powerful tools in astronomy, capable of developing large kinematic samples in a fraction of the time required by single-object spectroscopy. The recently commissioned Michigan Magellan Fiber System (M2FS) is a multi-mode, multi-object, fiber-fed optical spectrograph capable of observing up to 256 targets with its 1.2" fibers. By using M2FS’s adjustable slit mechanism with telluric lines as a wavelength reference we have developed an instrument capable of measuring absolute velocities to 25 m/s for up to 256 objects simultaneously. We briefly describe M2FS’s baseline capabilities and then discuss the fiber slit mechanism we created for M2FS. Finally we review our analysis methods, highlighting both the additional calibration opportunities presented by multi-object observations and the effects of atmospheric models on our achieved precision.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John I. Bailey, John I. Bailey, Mario L. Mateo, Mario L. Mateo, Jeffrey D. Crane, Jeffrey D. Crane, "Achieving decameter velocity precision with a multi-object spectrograph", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91476P (28 July 2014); doi: 10.1117/12.2055536; https://doi.org/10.1117/12.2055536

Back to Top