Tools and Tips

XSHOOTER contributed paper library

Publications based on data obtained with X-shooter should quote the following reference paper: Vernet et al. 2011, A&A, 536A, 105.

 

XSHOOTER specific tools and information

 

Telluric standard stars - WARNING:

Starting from Period 100, telluric standard stars are not provided by the observatory as part of the calibration plan anymore if the requested S/N of the science spectrum in a single OB is above 10. Otherwise, the user has to explicitly state in the README file that they require a telluric standard star, which then will be provided by the observatory. Users are encouraged to use the molecfit tool, which allows users to fit and correct telluric lines. However, observations of telluric standard stars may be required in some cases  (large number of intrinsic features, little or no continuum, low S/N), whose corresponding execution time must be taken into account at Phase 1. Telluric standard stars can be searched for with the Telluric Standard Star Catalogue Search Tool.

For observatory provided telluric standard stars: They are observed in nodding mode since Period 91. The 400kHz readout mode for the UVB/VIS arms is used independently of the readout speed of the science observations. Detector binning will be the same as for the science observations. The spectra will have about 10,000 ADUs in the middle of the brightest orders of each arms (S/N~50-100). Users requiring higher S/N are encouraged to submit their own telluric star OBs, in which case the corresponding execution time must be included in the time requested at Phase 1. The Observatory does not provide observations of telluric standard stars with slits of 5”, but will in this case provide a telluric with smaller slit widths.

 

Generic tools and information

Some information and tools that are shared by all instruments.