Bibcode
Garzon, Francisco; Rasilla, Jose L.; Fuentes, F. Javier; Barreto, M.; Cavaller, Luis; Hammersley, Peter L.; Prieto, A.
Bibliographical reference
Proc. SPIE Vol. 3354, p. 638-646, Infrared Astronomical Instrumentation, Albert M. Fowler; Ed.
Advertised on:
8
1998
Citations
0
Refereed citations
0
Description
ABEL is currently at the beginning of the design phase at the Instituto
de Astrofisica de Canaris. The instrument will be equipped with the 256
X 256 Santa Barbara Research Corporation InSb FPA which will provide a
working spectral range from 1 to 5 microns. For image mode three
different platescales are envisaged: 0.2 inch/pixel, to be used in the
thermal IR to avoid detector saturation; 0.4 inch/pixel, which will
allow for sufficient sampling of the median seeing limited images below
2.5 microns; and 1.0 inch/pixel, which will be the standard in
spectroscopic operations and during wide field imaging. For
spectroscopy, a standard moderate spectral resolution of about 400 will
be available in the JHKLM windows, which will be all fully covered in a
single exposure. Additional higher spectral resolution is under
consideration, which at least double. ABEL will offer a wide variety of
slit widths and shapes, ranging from 1 inch to 3 inches, and including
dog-leg shape. The thermal design is based on a two stages closed cycle
cooler, the first stage being used for the passive optics while the
second will cool directly the detector to about 30 to 40 K. The
instrument is planned for the late 99 and a major cooperation with the
Osservatorio de Arcetri is underway. ABEL will be installed in the
f/13.8 Cassegrain focus of the 1.5m Telescopio Carlos Sanchez, at the
Spanish Observatorio de El Teide, in the canarian island of Tenerife.