Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.344..205m&link_type=abstract
In ESA, Solar Physics and Astrophysics at Interferometric Resolution p 205-210 (SEE N93-10901 01-90)
Astronomy and Astrophysics
Astrophysics
7
Cameras, Data Acquisition, Design Analysis, Fourier Transformation, Imaging Spectrometers, Near Infrared Radiation, Planetary Nebulae, Signal To Noise Ratios, Solar Spectrometers, Spectral Resolution, Spectrum Analysis, Venus (Planet)
Scientific paper
Results of tests and details from a project which coupled a 256 by 256 NICMOS camera to a Fourier Transform Spectrometer (FTS) are reported. As a result of this successful coupling, spectroimaging in any bandpass between 1 and 2.5 micrometers of each point within a circular 24 arcsec field of view was permitted. The first tests were not too ambitious and limited to data cube of about 350 frames, enough to yield a spectral resolution of several thousands. The main limitation of the system was found to be the overhead time of the camera, which should be improved with a new camera. Analysis of the signal to noise ratios in reference stars, which showed an excess of noise compared to what is expected from a pure photon noise statistics, is discussed. Results of scans made of the planetary nebula NGC 7027 at 2.12 micrometers and of the dark side of Venus at 1.27 and 1.18 micrometers, are presented to illustrate this novel instrument.
Maillard Jean Pierre
Simons Douglas
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