CHIRON Instrument
Software Documentation
Technical Documents & Memos
Papers on CHIRON


CHIRON is a highly stable cross-dispersed echelle spectrometer at the SMARTS 1.5m telescope. It is fed by fiber and intended primarily for precise radial velocities.

  • Spectral resolution R~80000 (with image slicer: normal or Iodine mode) or R~25000 (fiber mode) or R~140000 (narrow-slit, bright stars), 3-pixel sampling
  • Spectral range 410-870 nm, fixed
  • Total efficiency ~6%
CHIRON is operational since 2011B. After recent upgrade, it is back in service since March 2012.
CHIRON replaces the previous spectrometer at 1.5m, FIBER ECHELLE









Software Documentation

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Technical Documents & Memos


Papers on CHIRON

  • Schwab, Ch., Spronck, J., Tokovinin, A., Szymkowiak, A., Giguere, M., Fisher, D. Performance of the CHIRON high-resolution Echelle spectrograph. 2012, Proc. SPIE, 8446, paper 8446-9. [PDF, 1.6M]
  • Spronck, J., Schwab, C., Tokovinin, A., Giguere, M., Szymkowiak, A., Fischer, D. Chiron - A Fiber-fed High-resolution Echelle Spectrometer At CTIO 1.5m Telescope May 2011, AAS Meeting #218, #409.03 [PDF, 12M]
  • Schwab C., Spronck J.F.P., Tokovinin A., Fischer D. Design of the CHIRON high-resolution spectrometer at CTIO 2010, Proc. SPIE, 7735, paper 7735-159 [PDF, 1.3M]
  • Tokovinin A., Fischer D., Schwab, Ch., Spronck J.F.P. CHIRON - new planet-finding spectrometer. Presentation at the conference Astronomy of Exoplanets with Precise Radial Velocities, PSU, Aug 16-19 2010 , [PDF, 885K]
  • Tokovinin, A., Fischer, D.A., Bonati, M., Giguere, M.J., Moore, P., Schwab, Ch., Spronck, J. F. P., Szymkowiak, A. CHIRON - A Fiber Fed Spectrometer for Precise Radial Velocities. 2013, PASP, 125, 1336  [PDF, 1.1M]
  • Brewer, J. M., Giguere, M., Fischer, D. A. CHIRON TOOLS: Integrated Target Submission, Scheduling and Observing Systems for a High-Resolution Fiber-Fed Spectrograph. 2014, PASP, 126,  48

Refereed publications using CHIRON data

  • Ingleby, L., Calvet, N., Herczeg, G. et al. 2013, ApJ, 767, A112
  • Ratajczak, M., Helminiak, K. G., Konacki, M. & Jordan, A. 2013, MNRAS, 433, 2357
  • Shore, S. N., De Gennaro Aquino, I.,  Schwarz, G. J. et al. 2013, A&A, 553, A123
  • Tokovinin, A. 2013, AJ, 145, 76
  • Shivvers, I., Bloom, J. S., Richards, J. W. 2014, MNRAS, 441, 343
  • Jones, M. I., Jenkins, J. S., Bluhm, P. et al. 2014, A&A., 566, 113
  • Soto, M.G., Jenkins, J.S., Jones, M.I. 2015, MNRAS, 451, 3131
  • Bowler, B.P., Shkolnik, E.L., Liu, M.C. et al. 2015, ApJS, 806, 62
  • Waisberg, I.R., Romani, R.W. 2015, ApJ, 805, 18
  • Mennickent, R.E., Djurasevic, G., Cabezas, M. et al. 2015, MNRAS, 448, 1137
  • Mehner, A., Davidson, K., Humphreys, R.M. et al. 2015, A&A, 578, 122
  • Munari, F. & Walter, F. 2016, MNRAS, 455, L57


The design and construction of CHIRON was supported by the National Science Foundation under the ARRA AST-0923441. 

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