Instrument Keywords

Here is a non-exhaustive slit of instrument keywords.

• INS.MODE The instrument mode. It is a label codifying the arm (short or long) and the mode (imaging, spectroscopy, etc.) used for the current frame. See the ISAAC User's Manual for more information about possible values of this keyword.
• INS.FILT1.ID SW filter on filter wheel 1.
• INS.FILT2.ID SW filter on filter wheel 2.
• INS.FILT3.ID LW filter on filter wheel 1.
• INS.FILT4.ID LW filter on filter wheel 2.
• INS.OPTI1.ID Mask or slit in position (e.g. slit_1).
• INS.GRAT.NAME Grating in position (LR or MR).
• INS.GRAT.WLEN Central wavelength (microns). Note however that the value recorded here - in spite of the number of digits - is a rough estimate of the central wavelength.
• INS.GRAT.ORDER Grating order.
• INS.OPTI2.NAME Name of the objective.
• INS.LAMP1.ST Argon lamp status.
• INS.LAMP2.ST Xenon lamp status.
• DET.DIT Detector Integration Time (seconds)
• DET.NDIT Number of averaged DITs.
• DET.MODE.NAME Detector readout mode.
• INS.PIXSCALE Pixel scale in arcseconds per pixel.