First radial velocity results from the MINiature Exoplanet Radial Velocity Array (MINERVA)
Files
Published version
Date
2019-09-01
Authors
Wilson, Maurice L.
Eastman, Jason D.
Cornachione, Matthew
Wang, Sharon X.
Johnson, Samson A.
Sliski, David H.
Schap III, William J.
Morton, Timothy D.
Johnson, John Asher
McCrady, Nate
Version
Published version
OA Version
Citation
Maurice L. Wilson, Jason D. Eastman, Matthew A. Cornachione, Sharon X. Wang, Samson A. Johnson, David H. Sliski, William J. Schap III, Timothy D. Morton, John Asher Johnson, Nate McCrady, Jason T. Wright, Robert A. Wittenmyer, Peter Plavchan, Cullen H. Blake, Jonathan J. Swift, Michael Bottom, Ashley D. Baker, Stuart I. Barnes, Perry Berlind, Eric Blackhurst, Thomas G. Beatty, Adam S. Bolton, Bryson Cale, Michael L. Calkins, Ana Colón, Jon de Vera, Gilbert Esquerdo, Emilio E. Falco, Pascal Fortin, Juliana Garcia-Mejia, Claire Geneser, Steven R. Gibson, Gabriel Grell, Ted Groner, Samuel Halverson, John Hamlin, M. Henderson, J. Horner, Audrey Houghton, Stefaan Janssens, Graeme Jonas, Damien Jones, Annie Kirby, George Lawrence, Julien Andrew Luebbers, Philip S. Muirhead, Justin Myles, Chantanelle Nava, Kevin O. Rivera-García, Tony Reed, Howard M. Relles, Reed Riddle, Connor Robinson, Forest Chaput de Saintonge, Anthony Sergi. 2019. "First Radial Velocity Results From the MINiature Exoplanet Radial Velocity Array (MINERVA)." Publications of the Astronomical Society of the Pacific, Volume 131, Issue 1005, pp. 115001 - 115001. https://doi.org/10.1088/1538-3873/ab33c5
Abstract
The MINiature Exoplanet Radial Velocity Array (MINERVA) is a dedicated observatory of four 0.7 m robotic telescopes fiber-fed to a KiwiSpec spectrograph. The MINERVA mission is to discover super-Earths in the habitable zones of nearby stars. This can be accomplished with MINERVA's unique combination of high precision and high cadence over long time periods. In this work, we detail changes to the MINERVA facility that have occurred since our previous paper. We then describe MINERVA's robotic control software, the process by which we perform 1D spectral extraction, and our forward modeling Doppler pipeline. In the process of improving our forward modeling procedure, we found that our spectrograph's intrinsic instrumental profile is stable for at least nine months. Because of that, we characterized our instrumental profile with a time-independent, cubic spline function based on the profile in the cross dispersion direction, with which we achieved a radial velocity precision similar to using a conventional "sum-of-Gaussians" instrumental profile: 1.8 m s−1 over 1.5 months on the RV standard star HD 122064. Therefore, we conclude that the instrumental profile need not be perfectly accurate as long as it is stable. In addition, we observed 51 Peg and our results are consistent with the literature, confirming our spectrograph and Doppler pipeline are producing accurate and precise radial velocities.
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License
© 2019 The American Astronomical Society.