Photometry of K2 Campaign 9 bulge data

Poleski, R.; Penny, M.; Gaudi, B. S.; Udalski, A.; Ranc, C.; Barentsen, G.; Gould, A.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Photometry of K2 Campaign 9 bulge data

MPS-Authors

Poleski, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Penny, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gaudi, B. S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Udalski, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ranc, C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Barentsen, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gould, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019A&A...627A..54P
(Any fulltext)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Poleski, R., Penny, M., Gaudi, B. S., Udalski, A., Ranc, C., Barentsen, G., et al. (2019). Photometry of K2 Campaign 9 bulge data. Astronomy and Astrophysics, 627.

Cite as: https://hdl.handle.net/21.11116/0000-0005-D004-B

Abstract

In its Campaign 9, K2 observed dense regions toward the Galactic bulge in order to constrain the microlensing parallaxes and probe for free- floating planets. Photometric reduction of the K2 bulge data poses a significant challenge due to a combination of the very high stellar density, large pixels of the Kepler camera, and the pointing drift of the spacecraft. Here we present a new method to extract K2 photometry in dense stellar regions. We extended the Causal Pixel Model developed for less-crowded fields, first by using the pixel response function together with accurate astrometric grids, second by combining signals from a few pixels, and third by simultaneously fitting for an astrophysical model. We tested the method on two microlensing events and a long-period eclipsing binary. The extracted K2 photometry is an order of magnitude more precise than the photometry from other method.