H. Voss

Publications (8)4.03 Total impact

• Source

  Available from: Petr Kabath

  Article: The BAST algorithm for transit detection

  S. Renner, H. Rauer, A. Erikson, P. Hedelt, P. Kabath, R. Titz, H. Voss
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  ABSTRACT: The pioneer space mission for photometric exoplanet searches, CoRoT, steadily monitors about 12000 stars in each of its fields of view. Transit detection algorithms are applied to derive promising planetary candidates, which are then followed-up with ground-based observations. We present BAST (Berlin Automatic Search for Transits), a new algorithm for periodic transit detection, and test it on simulated CoRoT data. BAST searches for box-shaped signals in normalized, filtered, variability-fitted, and unfolded light curves. A low-pass filter is applied to remove high-frequency signals, and linear fits to subsections of data are subtracted to remove the star's variability. A search for periodicity is then performed in transit events identified above a given detection threshold. Some criteria are defined to better separate planet candidates from binary stars. From the analysis of simulated CoRoT light curves, we show that the BAST detection performance is similar to that of the Box-fitting Least-Square (BLS) method if the signal-to-noise ratio is high. However, the BAST box search for transits computes 10 times faster than the BLS method. By adding periodic transits to simulated CoRoT data, we show that the minimum periodic depth detectable with BAST is a linearly increasing function of the noise level. For low-noise light curves, the detection limit corresponds to a transit depth d~0.01%, i.e. a planet of 1 Earth radius around a solar-type star. Comment: 4 pages, 3 figures, to be published in A&A
  10/2008;
• Conference Proceeding: Lightcurves from objective prism observations

  H. Rauer, H. Voss, A. Erikson
  3rd COROT science week, Liege, 4-7 Dec 2002;
• Conference Proceeding: CoRoT Blind Test 2

  P. Kabath, A. Erikson, H. Rauer, H. Voss
  German CoRoT CO-I Meeting;
• Article: Pre-discovery observations of CoRoT Exo-1b and Exo-2b with the BEST survey

  Heike Rauer, Anders Erikson, Petr Kabath, Pascal Hedelt, M Boer, L Carone, Szilard Csizmadia, P Eigmüller, Philip von Paris, Stefan Renner, G Tournois, Ruth Titz, H Voss
  The Astronomical Journal 139(2010-1):53-58. · 4.03 Impact Factor
• Conference Proceeding: Characterization of CoRoT target stars with BEST

  A. Erikson, H. Rauer, H. Voss
  COROT week 5, Berlin, 10-12 Dec. 2003;
• Conference Proceeding: Why do ground based planet transit searches give only a few detections so far?

  H. Voss, H. Rauer, A. Erikson, R. Titz
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  ABSTRACT: After the first detection of the transiting extrasolar planet HD 209458b in 1999 more than 20 groundbased transit searches has been established. The expectations were high to find several hundreds of transiting hot Jupiters only in a few years. With the exception of OGLE candidates no secured detections have been reported so dar. Were these assumptions too optimistic or is there really a lack of transiting hot Jupiters? Based on our experience with the Berlin Exoplanet Search Telescope (BEST) the transit detection rates for groundbased searches are discussed. Aspects like the number of expected solar-like stars in the observed fields, geometrical probability, crowding, duty cycle, detection limits and optimized choice of the target fields are adressed with the aim to optimize observation strategies and instruments to reach higher transit detection rates.
  3. Workshop Planetenbildung: Das Sonnensystem und extrasolare Planeten, Münster, 6.-8. Oktober 2004;
• Conference Proceeding: Why do groundbased planet transit searches give only a few detections so far?

  H. Voss, R. Heike, A. Erikson
  [show abstract] [hide abstract]
  ABSTRACT: After the first detection of the transiting extrasolar planet HD 209458b in 1999 more than 20 groundbased transit searches has been established. the expectations to find several hundreds of transiting hot Jupiters only in a few years were high. Detections of transiting planets give important information about the orbit, size and mass distributions of hot giant planets. But with exception of OGLE-TR 56b no secured detection has been reported so far. Were these assumptions too optimistic or is there really a lack of transiting hot Jupiters? Based on our experience with the Berlin Exoplanet Search Telescope we will discuss the transit detection and false alarm rates for groundbased searches. Aspects like the number of expected solar-like stars in the observed region, binarity, geometrical probability, crowding, duty cycle, detection limits and optimized choice of the targed fields will be discussed with the aim to optimize observation strategies and instruments to reach higher transit detection rates.
  1st General Assembly of the European Geosciences Union, Nice, France, 25 - 30 April 2004;
• Conference Proceeding: Extrasolar Planets

  H. Rauer, H. Voss, A. Erikson
  Frühjahrstagung 2005 der Deutschen Physikalischen Gesellschaft, Berlin, 4.-9. März 2005;