Added osiris open source news.

index.html

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               <h4><a href="news.html">Latest news</a></h4>
-                <p><b>
-                  "Arbitrarily structured laser pulses" published in Physical Review Research</b>: 
+                <p>
+                  <b>"Arbitrarily structured laser pulses" published in Physical Review Research</b>: 
                   A new mathematical formalism for describing laser fields with complex spatial and temporal 
                   structure has just been published in Physical Review Research.
                   This work was lead by PICKSC team member Jacob Pierce. 
@@ -45,16 +45,15 @@ <h4><a href="news.html">Latest news</a></h4>
                   laser-based applications, including laser wakefield acceleration, inertial confinement fusion, 
                   nanophotonics, and attosecond physics.
                 </p>
-                <!-- <img src="assets/img/news/astrl_visxd.png" align="left" style="margin:0px 25px"> -->
-              <!-- <p><b>KNL Timings</b>: PICKSC researchers have been updating our software to take full advantage of the many-core Intel 
-              Knight’s Landing (KNL) nodes. An OpenMP 3D electrostatic code from UPIC 2.0 has achieved a performance of 
-              850 psec/particle-step on a single Intel KNL node. On a large memory KNL such as the 96 GB node on the Cori 
-              machine at NERSC, a PIC simulation with a billion particles will run in about one second per time step. A new 
-              branch of QuickPIC has also been compiled and run on Cori at NERSC. On a single KNL node with 68 threads, the 
-              total time spent on one particle per step is 3.82 ns (including 1 iteration).</p>
-              <p><b>Fortran OpenPMD File Writers</b>: We have written an open source program that contains Fortran interfaces 
-              for parallel writing of 2D/3D mesh field data and particle data into HDF5 files using the OpenPMD standard. The 
-              software is open source and available on our GitHub repositories here.</p> -->
+
+                <p>
+                  <b>State-of-the-art PIC code OSIRIS is now open-source</b>: 
+                  The state-of-the-art particle-in-cell code OSIRIS which has been continuously developed by our team and close collaborators for more than two decades is now open-source! 
+                  The code can be found <a href="https://osiris-code.github.io/">here</a>. The new website contains all the relevant information for new users to start using the code. 
+                  We invite interested users and developers to join the OSIRIS Consortium in order to benefit from a close community of developers that working on advanced new features. 
+                  Details and contact information for joining the Consortium can be found <a href="https://osiris-code.github.io/consortium/">here</a>.
+                </p>
+
               <p><a href="news.html">Read more news</a>.</p>
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