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Paper: Update on Data Processing with the GBT
Volume: 376, Astronomical Data Analysis Software and Systems XVI
Page: 277
Authors: Garwood, R.W.; Braatz, J.A.; Maddalena, R.J.; Marganian, P.; Minter, A.H.
Abstract: The Green Bank Telescope (GBT) is a general purpose instrument that operates at frequencies from 300 MHz to 50 GHz, and addresses a range of astronomical problems from mapping the Moon to studying the earliest structures in the universe. Data processing and analysis for the GBT is complex and relies on a combination of strategies, generally tied to the data recording device (back-end) being used. Pulsar and radar observations are reduced and analyzed using software developed by individual research groups. All other GBT data analysis is supported by in-house efforts. We will outline the data processing paths and software applications used for each type of observation, including continuum imaging, spectral line on-the-fly mapping, and point source spectroscopy. The primary package for calibration and reduction of spectral line data is GBTIDL. We will describe flagging capabilities recently added to this package. GBTIDL is extensible and is used as a base by observers using specialized methods such as polarization measurements or pulsed spectral line experiments. The package also lends itself to incorporation of alternative calibration algorithms and techniques.
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