MPI for Gravitational Physics<p>How can you learn in real-time about new gravitational-wave candidate signals discovered by <span class="h-card"><a href="https://astrodon.social/@LIGO" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>LIGO</span></a></span>, Virgo, and KAGRA during the fourth observing run O4? One possibility: the “Public Alerts” on the GraceDB webpage:</p><p>🚨 <a href="https://gracedb.ligo.org" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="">gracedb.ligo.org</span><span class="invisible"></span></a></p><p><a href="https://social.mpdl.mpg.de/tags/Waiting4O4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Waiting4O4</span></a> <a href="https://social.mpdl.mpg.de/tags/O4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>O4</span></a> <a href="https://social.mpdl.mpg.de/tags/FutureFriday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FutureFriday</span></a></p>