GeminiFocus January 2018 | Page 21

Figure 3. Difference in radial velocity between one of the three science fibers and the calibration fiber for approximately 4,000 etalon lines from 16 orders of the blue arm. The timespan is 24 hours. Data were taken with 10 second to 5 minute cadence. No drift between the two fibers is apparent at the cm/s level with an RMS of 19 cm/s for the individual exposures. Figure 4. At present, the instrument team, with input from Gemini staff, is designing a front end for MAROON-X to connect to an instrument port, while the instrument itself will reside in the pier lab. We anticipate beginning com- missioning at the end of 2018 or beginning of 2019 in order to offer this exciting new set of capabilities to the Gemini user community. The MAROON-X team acknowledges fund- ing for this project from the David & Lucile Packard Foundation, the Heising-Simons Foundation, and the University of Chicago. Jacob Bean is Associate Professor in the Dept. of Astronomy and Astrophysics at the University of Chicago. He can be reached at: [email protected] Andreas Seifahrt is Research Associate Professor in the Dept. of Astronomy and Astrophysics at the University of Chicago. He can be reached at: [email protected] January 2018 Alison Peck is an Instrument Program Scientist at Gemini North. She can be reached at: [email protected] References Deming, D., Seager, S., Winn, J., et al., Publica- tions of the Astronomical Society of the Pacific, 121: 952, 2009 Howard, A., Johnson, J., Marcy, G., et al., The As- trophysical Journal, 730: 10, 2011 Lovis, C., Ségransan, D., Mayor, M., et al., Astron- omy & Astrophysics, 528: 112, 2011 Pepe, F., Lovis, C., Ségransan, D., et al., Astrono- my & Astrophysics, 534: 58, 2011 Seifahrt, A., Bean, J. L., Stürmer, J., et al., SPIE, 9908, 990818, 2016 Stürmer, J., Seifahrt, A., Schwab, Ch., et al., Jour- nal of Astronomical Telescopes, Instruments, and Systems, 3: 025003, 2017 GeminiFocus Small subsection of a solar spectrum recorded with MAROON-X at the University of Chicago. For comparison we overplot the same region from the solar atlas of Wallace et al. (2011) obtained with the Fourier Transform Spectrometer (FTS) at the McMath-Pierce Telescope, reduced to the spectral resolving power of MAROON-X (R = 80,000). In the bottom of the figure we show the simultaneously recorded spectrum from the MAROON-X etalon calibrator. The spectra have been flat-fielded and are blaze corrected. 19