<title>Performance and results with a double-beam infrared camera</title>

Abstract

This paper describes the performance of a unique new infrared array camera system which provides simultaneous imaging at two wavelengths in the near infrared. Two-color imaging is achieved with a dicbroic beam splitter which yields two independent beams, one short-wave (SW) from 1-2.5 jim and one long-wave (LW) from 2-5 pm. A Rockwell NICMOS 3 256x256 HgCdTe array is used in the SW channel and the LW channel has an InSb 256x256 array from SBRC. The instrument, which is designed for the University of California's Lick Observatory 3-rn telescope and for the f/15 focus of the 10-m W.M. Keck telescope, employs a closed cycle refrigerator and a compact array control/data acquisition systern based on transputers with a host 486 PC. On the Lick 3-rn telescope the pixel size is 0.7" which gives a field of view of about 180"x180". Facilities are also provided for spectroscopy and polarimetry. Recent observational results are reported to illustrate the performance of this system.

Near‐Infrared Observations of the Environments of Radio‐quiet QSOs atz ≳ 1

“…The UCLA 2-Channel Near-IR Camera (see also McLean et al, 1993McLean et al, , 1994 has two independent infrared arrays, one 256 × 256 pixel NICMOS 3 HgCdTe device and one 256 × 256 pixel SBRC InSb detector. The camera is a low-noise, high-throughput system.…”

Swimming with ShARCS: comparison of on-sky sensitivity with model predictions for ShaneAO on the Lick Observatory 3-meter telescope

“…‡ Gemini in Table 2 is an older infrared camera which made sky background measurements as well. 16 The sky backgrounds predicted by the ShaneAO model with no dust coating the optics and a 3% dust coating for the existing system (IRCAL) are in Table 3. The predicted values are in good agreement with the measured values in Table 2 Compared to Keck, the dust fraction had to be increased to 3% to better match the IRCAL system's magnitudes and throughput.…”

“…LGS mode with 8×8 subapertures and 300 second Fowler- 16 Table 5. Sky background and throughput predictions for new ShaneAO system.…”

HD 199143 and HD 358623: Two recently identified members of the β Pictoris moving group

“…With 30 pixelation, we see no indication at all of an X-ray source one minute north of the star. We also investigated the area north of the star with UCLA's twin-channel Gemini camera (McLean et al 1994) at the Shane Telescope on 5 August 2001. A 60 s J-band exposure with limiting magnitude (3σ) of 19.1 mag reveals no source 1 to the north of HD 199143.…”