K2mosaic: Mosaic Kepler Pixel Data

Mosaic Target Pixel Files (TPFs) obtained by NASA’s Kepler/K2 missions into CCD-sized images and movies.

K2mosaic is a command-line tool which allows the postage stamp-sized pixel masks obtained by NASA’s Kepler and K2 missions to be stitched together into CCD-sized mosaics and movies. The principal use is to take a set of Target Pixel Files (TPF) and turn them into more traditional FITS image files – one per CCD channel and per cadence. K2mosaic can also be used to create fancy animations from these mosaics.

The need for this tool arises from the fact that the analysis of certain Kepler/K2 targets, such as clusters and asteroids, is more easily performed on mosaicked data. Moreover such mosaics are useful to reveal the context of single-star observations, e.g. they enable users to check for the presence of instrumental noise or nearby bright objects.

Basic usage

To create a mosaic of all pixels obtained on CCD channel #65 during K2 Campaign 7, you would run:

$ pip install k2mosaic
$ k2mosaic tpflist 7 65 > list-of-target-pixel-files.txt
$ k2mosaic mosaic list-of-target-pixel-files.txt --cadence 119456

This will create a file called k2mosaic-c07-ch65-cad119456.fits.

License & Attribution

Copyright 2016 Geert Barentsen and contributors.

K2mosaic is free software made available under the MIT License. For details see LICENSE.

If this tool aided your research, please cite it. Get in touch for instructions.