Bibcode
Reyes, Marcos; Joven-Alvarez, Enrique; Collados, Manuel; Bonet, Jose A.; Vazquez, Manuel; Diaz, Jose J.; Fuentes, F. Javier; Escalera, Victor G.; Rodriguez, Luis F.; Garcia-Herrero, Jose L.
Referencia bibliográfica
Proc. SPIE Vol. 3410, p. 233-244, Advanced Focal Plane Arrays and Electronic Cameras II, Thierry M. Bernard; Ed.
Fecha de publicación:
9
1998
Número de citas
0
Número de citas referidas
0
Descripción
We report here the main characteristics of a near IR camera devoted to
astrophysical solar research, which has been developed by the Instituto
de Astrofisica de Canarias (IAC). The system is now being used for
photometric and spectroscopic applications, and it will also be used for
spectropolarimetry in the near future. The first application is
described below in detail. The IACs IR camera is based on a Rockwell 256
X 256 HgCdTe NICMOS3 array, sensitive from 1 to 2.5 microns. The
necessary cooling system is a LN2- cryostat, designed and built by IR
labs under out requirements. The main electronics are the standard VME-
based, FPGA programmable MCE-3 system, also developed by IR labs. We
have implemented different readout schemes to improve sped, reduce noise
and avoid seeing effects, taking into account each specific application.
Data are transferred via fiber optics to a control unit, which re-send
them to the main data acquisition system. Several acquisition modes to
select the best images have been implemented, and a real- time data
processing is available, the entire camera has been characterized and
calibrated, and the main radiometric parameters given. Preliminary test
in spectroscopic observations have been made in the German Towers at the
Observatorio del Teide in Tenerife, Spain, and a series of photometric
measurements performed in the Swedish Solar Telescope, at the
Observatorio del Roque de los Muchachos in La Palma, Spain. As examples,
some scientific results are also presented.