Exposure time calculator for IFOSC and sky background estimation

Details Exposure time calculator for IFOSC and sky background estimation Exposure time calculator for IFOSC and sky background estimation

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005basi...33..513c&link_type=abstract

Bulletin of the Astronomical Society of India, vol. 33, Issue 4, p.513

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Telescopes, Instrumentation: Spectrographs, Methods: Observational, Techniques: Spectroscopic, Scattering, Atmospheric Effects

Scientific paper

This paper describes a spectroscopy exposure time calculator for the faint object spectrograph, the IUCAA Faint Object Spectrograph" (IFOSC). It is intended to provide reasonable estimates of exposure times for observations. The background sky brightness is modeled for different phases and angular distance from the Moon. The code automatically calculates the Lunar Ephemerides from the date and time of observations and uses it for sky brightness computations. We adopt a new technique of scaling the Rayleigh and the Mie scattering functions, according to the corresponding extinction terms. This estimation of the sky brightness with moonlight fits reasonably well with the observed sky brightness measured at the IUCAA telescope site.

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