In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
Numerical Relativity, The Einstein Toolkit, and Binary Black Mergers Inside of Stars
The direct detection of gravitational waves by LIGO has opened the door to new tests of General Relativity and to true multi-messenger observations of compact objects. Numerical relativity simulations are crucial tools for predicting gravitational waves and other signals from these sources. I give an overview of numerical relativity and highlight The Einstein Toolkit, an open-source simulation toolkit for relativistic astrophysics. I discuss a recent application of the Toolkit to the simulation of binary black hole mergers in stellar-density gas. This study was motivated by the proposal that a pair of black holes could form in situ during the collapse and dynamical fragmentation of a massive star's core. The remaining gas would be accreted by the merger remnant, possibly creating outflows that could lead to an electromagnetic counterpart to a stellar-mass binary black hole merger. Our simulations show that stellar gas has a pronounced effect on the coalescence dynamics and the emitted gravitational waves, making the dynamical fragmentation proposal difficult to reconcile with the observation of GW150914.