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
  • Surina, F., et al. 2014, AJ, 147, 107
  • Jones, M. I., Jenkins, J. S., Bluhm, P. et al. 2014, A&A., 566, 113
  • Jones, M. I., Jenkins, J. S., Rojo, P. et al. 2015A&A...573A...3J
  • 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
  • Jones, M., Jenkins, J. et al. 2015, A&A, 580, 14
  • Hinkel, N.R. et al. 2015, AJ, 150, 169
  • Tokovinin, A. 2015, AJ, 150, 177
  • Berta-Thompson, Z. K.; Irwin, J., Charbonneau, D. et al. 2015Natur.527..204B
  • Richardson, N.D.  Gies, D. R.,  Gull,  T. R., Moffat,  A. F. J. &  St-Jean,  L.   2015,  AJ,   150,  109
  • Munari, F. & Walter, F. 2016, MNRAS, 455, L57
  • Richardson, N.D. et al. 2016, MNRAS, 455, 244
  • Richardson, N. D., Madura, T. I., St-Jean, L. et al.  2016MNRAS.461.2540R
  • Gullikson, K. Kraus, A., Dodson-Robinson, S. Jaffe, D. et al.  2016, AJ, 151, 3
  • Bond, H.E., Ciardullo, R., Siegel, M.H. 2016, AJ, 151, 40
  • Fischer, D.A. et al. 2016, PASP, 128, 6001
  • Giguere, M.J. et al. 2016, ApJ, 824, 150
  • Teodoro, M. et al. 2016, ApJ, 819, 131
  • Tokovinin, A. 2016, AJ, 152, 11
  • Tokovinin, A. 2016, AJ, 152, 10
  • Gullikson, K., Kraus, A., Dodson-Robinson, S. 2016, AJ, 152, 40
  • Jones, M. I., Jenkins, J. S., Brahm, R. et al. 2016, A&A, 590, 38
  • Johnson, M. C., Endl, M. Cochran, W. D. et al. 2016ApJ...821...74J
  • Bluhm, P., Jones, M. I., Vanzi, L. et al. 2016, A&A, 593, 133
  • Ratajczak, M. et al. 2016, MNRAS, 461, 2234
  • Schaefer, G. H., Hummel, C. A., Gies, D. R. et al. 2016AJ....152..213S
  • Lester, K. V., Gies, D. R., Guo, Zhao  2016AJ....152..194L
  • Kane, S. R.; Wittenmyer, R. A., Hinkel, N. R. et al. 2016ApJ...821...65K
  • Richardson, N. D.; Russell, C. M. P.; St-Jean, L. et al. 2017MNRAS.471.2715R
  • Buysschaert, B., Neiner, C., Richardson, N. D. et al. 2017A&A...602A..91B
  • Linford, J. D., Chomiuk, L., Nelson, T. et al. 2017ApJ...842...73L
  • Buysschaert, B., Neiner, C., Richardson, N. D. et al. 2017A&A...602A..91B
  • Jones, M. I., Brahm, R., Wittenmyer, R. A. et al. 2017A&A...602A..58J
  • Mayer, P., Harmanec, P., Chini, R. et al.  2017A&A...600A..33M
  • Tokovinin, A., Latham, D. W. 2017ApJ...838...54T
  • Li, C.-J., Chu, Y.-H., Gruendl, R. A. et al. 2017ApJ...836...85L
  • Wittenmyer, R. A.; Jones, M. I., Zhao, J. et al. 2017AJ....153...51W
  • Khokhlov, S. A., Miroshnichenko, A. S., Mennickent, R. et al. 2017ApJ...835...53K


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


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