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http://www.arcetri.astro.it/~lt/preprints/oribar/oribar.ps.gz.
http://www.arcetri.astro.it/~lt/preprints/oribar/oribar.ps.gz.
1. Procedures for Observations
... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...
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Ссылки http://www.arcetri.astro.it/irlab/instr/longsp/doc/proc_ob.html -- 7.9 Кб -- 16.02.2000
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