Maximizing Kepler science return per telemetered pixel: Detailed models of the focal plane in the two-wheel era
| Autor: | Hogg, David W., Angus, Ruth, Barclay, Tom, Dawson, Rebekah, Fergus, Rob, Foreman-Mackey, Dan, Harmeling, Stefan, Hirsch, Michael, Lang, Dustin, Montet, Benjamin T., Schiminovich, David, Schölkopf, Bernhard |
|---|---|
| Rok vydání: | 2013 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Kepler's immense photometric precision to date was maintained through satellite stability and precise pointing. In this white paper, we argue that image modeling--fitting the Kepler-downlinked raw pixel data--can vastly improve the precision of Kepler in pointing-degraded two-wheel mode. We argue that a non-trivial modeling effort may permit continuance of photometry at 10-ppm-level precision. We demonstrate some baby steps towards precise models in both data-driven (flexible) and physics-driven (interpretably parameterized) modes. We demonstrate that the expected drift or jitter in positions in the two-weel era will help with constraining calibration parameters. In particular, we show that we can infer the device flat-field at higher than pixel resolution; that is, we can infer pixel-to-pixel variations in intra-pixel sensitivity. These results are relevant to almost any scientific goal for the repurposed mission; image modeling ought to be a part of any two-wheel repurpose for the satellite. We make other recommendations for Kepler operations, but fundamentally advocate that the project stick with its core mission of finding and characterizing Earth analogs. [abridged] Comment: A white paper submitted in response to the "Kepler Project Office Call for White Papers: Soliciting Community Input for Alternate Science Investigations for the Kepler Spacecraft"; 24 pages in length (that is, 14 pages over the white-paper page limit) |
| Databáze: | arXiv |
| Externí odkaz: |
|