Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-11-27
New Astron.15:678-687,2010
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
6 figures, submitted to New Astronomy
Scientific paper
10.1016/j.newast.2010.05.001
The Planck On-Fligh Forecaster (POFF) is a tool to predict when a position in the sky will be within a selected angular distance from any receiver direction of the Planck satellite according to its pre-programmed observational strategy. This tool has been developed in the framework of the Planck LFI Core Team activities, but it is now used by the whole collaboration. In this paper we will describe the tool and its applications to plan observations with other instruments of point sources which are expected to enhance the possibilities of scientific exploitation of the Planck satellite data, once they will be publicly available. Collecting simultaneous multi-frequency data, like those that can be planned with the POFF, will help, on one hand, to investigate variability of point sources and, on the other, to reconstruct point source spectral energy distributions on wide frequency ranges minimizing the effects due to source variability. POFF is a combination of IDL routines which combine the publicly available information about the Planck scanning strategy and focal plane shape in order to identify if a given (list of) position(s) can be observable by the satellite at a given frequency and/or by selected receivers in a given time range. The output can be displayed with the desired time resolution and selecting among various sorting options. The code is not a Planck product, but it has been validated within the Planck LFI pipeline. The code format and the large number of options make it flexible and suitable for many applications, allowing to get results quickly. POFF is currently successfully used to plan activities within the Planck collaboration, including observations with several ground-based facilities, and it is distributed outside it.
Burigana Carlo
Massardi Marcella
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