Planet Hunters Talk

Periodic glitches in K2 C2

  • davidbundy77 by davidbundy77

    I have noticed several light curves with dips occuring almost exactly every two days. This feature keeps turning up on different stars so I suspect they are all glitches. Look at the raw data for this example

    https://www.cfa.harvard.edu/~avanderb/k2c2/ep204569272.html

    It is easy to see that the periodic dips in the raw flux get much worse towards the end of the curve. The dips are caused by the periodic repositioning of Kepler every six hours. The processed data on Planet Hunters seems to have small periodic dips which look like transits but I suspect are just leftover artefacts from the bad portion of the curve. So we should be particularly wary about pseudo-transit patterns which are a multiple of a 6 hours.

    Posted