HIRESr configuration for High-z QSOs

Looking into the HIRES pages it seems that HIRESr could go redder than 9772Ang. (i.e. at 10200Ang., using a XD angle of 1.67). However the throughput drops quite a lot: https://www2.keck.hawaii.edu/inst/hires/throughput.pdf

Looking to the Sargent data of the QSO SDSS J1204-0021 (z=5.09, m1450=19.23) they cover the wavelength range from 5340Ang and 9940Ang (XD angle 1.390) with and from 5210Ang and 9860Ang (XD angle 1.257). Sargent uses a 3x1 binning and the high gain (note that low gain is the default mode).

Looking to the data of the QSO SDSS_J0818p1722 (z=6.02, m1450=19.24), they use a similar configuration to cover again the wavelength range from 5340Ang and 9940Ang (XD angle 1.3635) with and from 5210Ang and 9850Ang (XD angle 1.284). (A. Cowie has some data on the same target, that goes at slightly higher wavelength: 5540-10440Ang. and 5780-10520Ang.)

Given these considerations, possibly we should use a single configuration for all the QSOs that is similar to the Sargent one (but with a 2x1 binning).


ECHELLE ANGLE = 0.705753

XDANGL = 1.418500

SLITLEN = 14.000 /Slit length projected on sky (arcsec)

SLITWIDT= 0.861 /Slit width projected on sky (arcsec)

WAVEBLUE= 5340 /Approximate blue end wavelength (A)

WAVECNTR= 7620 /Approximate central wavelength (A)

WAVERED = 9940 /Approximate red end wavelength (A)

BINNING = '3,1 '


ECHELLE ANGLE = -0.875

XDANGL = 1.3145

SLITLEN = 14.000 /Slit length projected on sky (arcsec)

SLITWIDT= 0.861 /Slit width projected on sky (arcsec)

WAVEBLUE= 5210 /Approximate blue end wavelength (A)

WAVECNTR= 7390 /Approximate central wavelength (A)

WAVERED = 9860 /Approximate red end wavelength (A)

BINNING = '3,1 '


Acquisition

The FoV is 80"x60". For high-z QSO science the best filter option may be rg610 that cover from 600nm to 1000nm: https://www2.keck.hawaii.edu/inst/hires/Guider_rg610.png The full list of filters for the guiding camera is here: https://www2.keck.hawaii.edu/inst/hires/filter_choices.html

HiresHighzQsoConfig (last edited 2017-02-23 02:10:31 by EmaFarina)