Sigma QUick Infrared Camera User Manual

MIRSI: a Mid-InfraRed Spectrometer and Imager Lynne K. Deutsch*a,b, Joseph L. Horab, Joseph D. Adamsa, Marc Kassisa aBoston University, bHarvard-Smi

parameters. The observing modes include: grab (which defines an exposure as a single on-source image), chop (which takes on- and off-source images by

our observations, with a resulting effective aperture of about only 20 inches, a total FOV of 7 x 5 arcmin, and a diffraction limited PSF with a FWHM

Table 1, and the array characteristics are given in Table 2. Details of the optical system, dewar, electronics, computer control, system integration

Figure 1. MIRSI dewar, side view. This is the orientation when the telescope is pointed at zenith. The LHe reservoir is in the center, the LN2 res

An L-shaped bracket holding the detector electronics box is bolted to the end of the optics box section and to the camera interface plate. 3. OPTI

distortion over the field, which is largest in the corners (at about 2.5 pixels). The distortion is not noticeable during observing and can be correc

also contains two driver boards for setting and driving the detector bias and clock voltages, respectively. Four DSP coadder boards containing four ch

Consequently, as replacement for the preamps, we fabricated a new signal cable to carry the signals from the dewar to the coadder board connectors. We

We chose to employ continuous operation of the ROIC readout, with non-destructive exposure sequences, under the assumption of greater stability in ROI

7.75:1, requiring 31000 steps and 1.5 minutes to complete one rotation. The filter wheel gear ratio also sets the positional accuracy of the CVF at ~