Skip to main content

Create beautiful quicklook movies from the pixel data observed by NASA's Kepler spacecraft.

Project description

K2flix: Kepler pixel data visualizer

***Create beautiful quicklook movies from the pixel data observed by
NASA's Kepler spacecraft.***

|PyPI| |PyPI| |Travis status| |MIT license| |DOI| |ADS Bibcode|

K2flix makes it easy to inspect the CCD pixel data obtained by `NASA's
Kepler space telescope <>`__. The need for this
tool arises from the fact that the two-wheeled extended Kepler mission,
K2, is affected by new sources of noise -- including pointing jitter and
foreground asteroids -- which are more easy to spot by eye than by
algorithm. The code takes Kepler's *Target Pixel Files (TPF)* as input
and turns them into contrast-stretched animated gifs or MPEG-4 movies.
These *TPF files* are publically available from the `Kepler
archive <>`__
and the `K2
archive <>`__.
K2flix can be used both as a command-line tool or using its Python API.


Asteroids commonly pass in front of Kepler/K2 targets. How many can you
spot in this example 2-day animation?


$ k2flix --start 545 --stop 680 --step 1 --fps 12\

To see many more examples, follow
[@KeplerBot]( on Twitter!


If you have a working installation of Python on your system, you can
install k2flix using pip:


$ pip install k2flix

Alternatively, you can get the latest version by installing from source:


$ git clone
$ cd k2flix
$ python install

K2flix has only been tested under Linux at present. Get in touch if you
encounter issues on OS X or Windows.

Using k2flix

Converting a Kepler pixel file to an animated gif:


$ k2flix tpf-file.fits.gz

Converting a Kepler pixel file to an MPEG-4 movie:


$ k2flix -o movie.mp4 tpf-file.fits.gz

K2flix supports reading from web URLs, so you can generate a movie
directly from the data archive:


$ k2flix

To see all the options, use the ``--help`` argument to see the full
usage information:


$ k2flix --help
usage: k2flix [-h] [-o filename] [--start IDX] [--stop IDX] [--step STEP]
[--fps FPS] [--dpi DPI] [--min_percent MIN_PERCENT]
[--max_percent MAX_PERCENT] [--cmap colormap_name] [--raw]
[--flags] [--jd | --mjd | --bjd | --bkjd | --cadence]
filename [filename ...]

Converts a Target Pixel File (TPF) from NASA's Kepler/K2 spacecraft into a
movie or animated gif.

positional arguments:
filename path to one or more Kepler Target Pixel Files (TPF)

optional arguments:
-h, --help show this help message and exit
-o filename, --output filename
output filename (default: gif with the same name as
the input file)
--start IDX first frame to show (default: 0)
--stop IDX last frame to show (default: -1)
--step STEP spacing between frames (default: output 100 frames)
--fps FPS frames per second (default: 15)
--dpi DPI resolution of the output in dots per K2 pixel
--min_percent MIN_PERCENT
percentile value used to determine the minimum cut
level (default: 1.0)
--max_percent MAX_PERCENT
percentile value used to determine the maximum cut
level (default: 95.0)
--cmap colormap_name matplotlib color map name (default: gray)
--raw show the uncalibrated pixel data ('RAW_CNTS')
--flags show quality flags
--jd show the Julian Day
--mjd show the Modified Julian Day
--bjd show the Barycentric Julian Day
--bkjd show the Bareycentric Kepler Julian Day
--cadence show the cadence number


If you use this tool in an academic publication, please include a
citation. The code has been registered in the Astrophysics Source Code
Library `[ascl:1503.001] <>`__ and the
preferred BibTeX entry is:


author = {{Barentsen}, G.},
title = "{K2flix: Kepler pixel data visualizer}",
howpublished = {Astrophysics Source Code Library},
year = 2015,
month = mar,
archivePrefix = "ascl",
eprint = {1503.001},
adsurl = {},
adsnote = {Provided by the SAO/NASA Astrophysics Data System},
doi = {10.5281/zenodo.15576},
url = {}


To report bugs and request features, please use the `issue
tracker <>`__. Code
contributions are very welcome.


Copyright 2016 Geert Barentsen. K2flix is free software made available
under the MIT License. For details see the LICENSE file.

.. |PyPI| image::
.. |PyPI| image::
.. |Travis status| image::
.. |MIT license| image::
.. |DOI| image::
.. |ADS Bibcode| image::

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for k2flix, version 1.1.0
Filename, size File type Python version Upload date Hashes
Filename, size k2flix-1.1.0.tar.gz (14.1 kB) File type Source Python version None Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring DigiCert DigiCert EV certificate Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page