CFHT Information Bulletin Number 37, Semester 97II

KIR: A New 1k x 1k IR Camera for the AOB

Jean-Luc Beuzit, Barry Starr & Jean-Charles Cuillandre,, CFHT (beuzit@cfht.hawaii.edu, starr@cfht.hawaii.edu, jcc@cfht.hawaii.edu)

KIR is a high resolution, 1kx1k near-infrared (1.0-2.55m) camera based on the Rockwell HAWAII HgCdTe focal plane array. It is designed to be used at the F/20 output focus of the CFHT Adaptive Optics Bonnette (AOB). It will be housed in an LN2 cryostat encompassing fixed 0.67:1.0 transfer optics, cold stop, filter wheel, pupil lens (Figure 13). It will be equipped with an external shutter. The system will be driven by an SDSU/Leach CCD controller and the user interface will be incorporated into the CFHT/Pegasus observing environment. KIR has been developed in collaboration by Université de Montréal, Observatoire Midi-Pyrénées and CFHT. CFHT selected Rockwell HAWAII array number #9-77R-2 as science grade array for KIR. This array has a mean QE of 65% for 99.57% of the array. The response nonuniformity is better than 9.5%. The mean dark current is 0.15 electrons/sec. Table 3 gives a summary of the KIR characteristics whereas the preliminary list of filters can be found in table 4

KIR is presently undergoing its final acceptance test and first light is anticipated for 21 September 1997. KIR will replace MONICA as the AOB infrared camera from December 1997 onwards.

For more information and recent upgrades on KIR (availability, performances, etc.), please take a look at our web site (http://www.cfht.hawaii.edu/manuals/ir/KIR/KIR.html) or contact Jean-Luc Beuzit (beuzit@cfht.hawaii.edu).

Table 3: KIR Preliminary Characteristics

Detector format

1024x1024

Readout noise

< 12 e-/pixel

Detector material

HgCdTe

Dark current

0.15 e-/sec

Readout

Direct readout (4 channels)

Mean quantum efficiency (detector only)

65 %

Spectral range

1-2.5µm

Minimum integration time

0.1 sec

Pixel pitch

18.5µm

Maximum integration time

1 hour

Filling factor

100 %

Plate scale

0.035 arcsec/pixel

Operating temperature

77 K

Total field of view

36"x36"

Table 4: KIR Filters

Filter

0 (µm)

(µm)

T (%)

Filter

0 (µm)

(µm)

T (%)

I

0.830

0.197

> 80

H continuum

1.664

0.018

> 65

J

1.250

0.160

> 80

Fe II

1.644

0.016

> 65

H

1.635

0.290

> 80

He I_2

2.058

0.021

> 65

K

2.200

0.340

> 80

He I_3

2.189

0.020

> 65

K'

2.120

0.340

> 80

H2 v=1-0

2.122

0.022

> 65

He I_1

1.083

0.010

> 65

Br

2.166

0.022

> 65

Pa

1.094

0.010

> 65

H2 v=2-1

2.248

0.022

> 65

J continuum

1.208

0.015

> 65

K continuum

2.270

0.020

> 65

O II

1.237

0.012

> 65

CO (2-0)

2.295

0.022

> 65

Pa

1.282

0.012

> 65

CO (3-1)

2.324

0.024

> 65



CFHT Information Bulletin Number 37, Semester 97II

tmca@cfht.hawaii.edu
Copyright © 1997, Canada-France-Hawaii Telescope