Optimized Herschel/PACS photometer observing and data reduction strategies for moving solar system targets

Kiss, C. and Müller, T. G. and Vilenius, E. and Pál, A. and Santos-Sanz, P. and Lellouch, E. and Marton, G. and Verebélyi, E. and Szalai, N. and Hartogh, P. and Stansberry, J. and Henry, F. and Delsanti, A. (2014) Optimized Herschel/PACS photometer observing and data reduction strategies for moving solar system targets. Experimental Astronomy, 37 (2). pp. 161-174. ISSN 0922-6435

Preview

Text 1309.4212.pdf - Accepted Version Download (2MB) | Preview

Abstract

The "TNOs are Cool!: A survey of the trans-Neptunian region" is a Herschel Open Time Key Program that aims to characterize planetary bodies at the outskirts of the Solar System using PACS and SPIRE data, mostly taken as scan-maps. In this paper we summarize our PACS data reduction scheme that uses a modified version of the standard pipeline for basic data reduction, optimized for faint, moving targets. Due to the low flux density of our targets the observations are confusion noise limited or at least often affected by bright nearby background sources at 100 and 160 m. To overcome these problems we developed techniques to characterize and eliminate the background at the positions of our targets and a background matching technique to compensate for pointing errors. We derive a variety of maps as science data products that are used depending on the source flux and background levels and the scientific purpose. Our techniques are also applicable to a wealth of other Herschel solar system photometric observations, e.g. comets and near-Earth asteroids. The principles of our observing strategies and reduction techniques for moving targets will also be applicable for similar surveys of future infrared space projects.

Actions (login required)

Edit Item