Computer Science
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hstc.worke..74d&link_type=abstract
"2010 Space Telescope Science Institute Calibration Workshop - Hubble after SM4. Preparing JWST, held 21-23 July 2010 at Space T
Computer Science
Scientific paper
The Exposure Time Calculator (ETC) is a web-based application to assists users in calculating the exposure time needed for their HST observations, or the Signal-to-Noise Ratio (SNR) that can be achieved with a given HST observing time. These quantities are key for the preparation of proposals and observations during Phase I and Phase II of the proposing cycle and therefore must be sufficiently accurate for each of the supported observing modes of all the HST instruments. Developing a general tool that shares commonality among the different instruments is complicated, not only from the point of view of attaining accuracy of the calculations but also regarding reliability, portability, and maintainability. We are currently in the final stages of the development of the new ETC for Cycle 19 in Python. This new version improves these qualities and meets the needed level of reliability for the ETC. It also provides a basis for JWST ETCs which are in preliminary development, with a limited-functionality prototype planned to be available in Spring 2011. This papers shows the new tool, its improvements over the previous ETC and the current status of the new version.
Busko Ivo
Diaz Rosa I.
Greenfield Paul
Laidler Victoria G.
Miller Thomas
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