This is a spectroscopy program with ISAAC in J, H and K band. We want to take spectra of a target 6arcsec separated from a 5mag brighter primary star. Position angle and separation of the target are shown in the finding charts as well as the slit rotation angle.
There is the bright primary in the field of view therefore during acquisition we use two narrow band filter as discribed in the manual. If neccessary the DITS in the acquisition template can be increased manually by the observer until the target (5mag fainter than the primary star) is visible. The slit can be centered then on the target. (If the primary reaches saturation at 40000 counts the target signal should be higher 400 counts hence visible in the acquisition frame)
The DITS in the science OB were calculated using ETC. However, the observer should check, after the first science frame is taken, that the linearity limit (10000 ADU) is not exceeded along the slit.
Bright star: HD16141 (J=5.7mag , H=5.3mag, K=5.3mag)
Target: H=10mag, 6.2 arcsec separated from the primary HD16141