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<!DOCTYPE html>
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<title>Astropy | v1.3 Released!</title>
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<section>
<h1>Astropy v1.3 Released!</h1>
<p>
Dear colleagues,
</p>
<p>
We are very happy to announce the v1.3 release of the Astropy package,
a core Python package for Astronomy:
</p>
<p align='center'>
<img src="astropy_logo_notext.png" style="width:80px;height:80px;"><br>
<a href="http://www.astropy.org">http://www.astropy.org</a>
</p>
<p>
Astropy is a community-driven Python package intended to contain much of the
core functionality and common tools needed for astronomy and astrophysics.
</p>
<p>
New and improved major functionality in this release includes:
<ul>
<li>The WCSAxes framework for plotting points or images on celestial coordinates in matplotlib.</li>
<li>A new function in astropy.visualization to generate 3-color images from astronomy images in different bands.</li>
<li>Astropy coordinate representations now combine like vectors, with useful mathematical operations that can be performed on them.</li>
<li>Astropy coordinates and time objects now behave much more consistently like arrays when they are reshaped.</li>
<li>Earth locations can now be created from a postal address.</li>
<li>JPL Ephemerides can now be used in the coordinates sub-package to improve the accuracy of coordinate transformations and barycentric time corrections.</li>
<li>FORTRAN-style extended floating precision files like 1.495D+238 can now be read using astropy.io.ascii or Table.read.</li>
<li>Astropy objects can now be serialized to (or re-loaded from) a standard YAML representation.</li>
<li>FITS HDUs can now be lazy loaded, improving performance in files with many HDUs.</li>
<li>The default cosmology is now Planck 2015.</li>
</ul>
</p>
<p>
In addition, hundreds of smaller improvements and fixes have been made. An
overview of the changes is provided at:
</p>
<p>
<a href="http://docs.astropy.org/en/stable/whatsnew/1.3.html">http://docs.astropy.org/en/stable/whatsnew/1.3.html</a>
</p>
<p>
Instructions for installing Astropy are provided on our <a
href="http://www.astropy.org">website</a>, and extensive documentation can be
found at:
</p>
<p>
<a href="http://docs.astropy.org">http://docs.astropy.org</a>
</p>
<p>
If you make use of the <a href="https://www.continuum.io/downloads">Anaconda
Python Distribution</a>, you can update to Astropy v1.3 with:
</p>
<pre>
conda update astropy
</pre>
<p>
Whereas if you usually use pip, you can do:
</p>
<pre>
pip install astropy --upgrade
</pre>
<p>
Please report any issues, or request new features via our GitHub repository:
</p>
<p>
<a href="https://github.com/astropy/astropy/issues">https://github.com/astropy/astropy/issues</a>
</p>
<p>
Over 210 developers have contributed code to Astropy so far, and you can find out more about the team behind Astropy here:
</p>
<p>
<a href="http://www.astropy.org/team.html">http://www.astropy.org/team.html</a>
</p>
<p>
Astropy v1.0 (our long term support release) will continue to be supported with bug fixes until the v2.0 release in June 2017, so if you need to use Astropy in a very stable environment, you may want to consider staying on the v1.0.x set of releases (for which we are simultaneously releasing v1.0.11).
</p>
<p>
While we typically do not support non-LTS releases, we are also simultaneously releasing an Astropy v1.2.2, the last in that series. This update is primarily to include a leap second at the end of 2016 (but also contains other bug fixes).
</p>
<p>
If you use Astropy directly for your work, or as a dependency to another
package, please remember to include the following acknowledgment at the end of
papers:
</p>
<p class="citation"><cite>This research made use of Astropy, a
community-developed core Python package for Astronomy (Astropy Collaboration,
2013).</cite></p>
<p>where <cite>(Astropy Collaboration, 2013)</cite> is a citation to the <a href="https://doi.org/10.1051/0004-6361/201322068" target="_blank">Astropy Paper</a> (<a href="http://adsabs.harvard.edu/abs/2013A%26A...558A..33A" target="_blank">ADS</a> -
<a href="http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2013A%26A...558A..33A&data_type=BIBTEX&db_key=AST&nocookieset=1" target="_blank">BibTeX</a>).</p>
<p>
Please feel free to forward this announcement to anyone you think might be interested in this release.
</p>
<p>
We hope that you enjoy using Astropy as much as we enjoyed developing it!
</p>
<p>
Erik Tollerud, Tom Robitaille, Kelle Cruz, and Tom Aldcroft<br>
on behalf of The Astropy Collaboration
</p>
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