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:
(Fysikum, University of Stockholm)
Light from distant astronomical sources is deflected by space-time curvature, as described by Einstein’s theory of General Relativity. Close alignment between the light source, intervening matter and the observer at Earth can result in significant enhancement of the measured flux. This phenomenon, known as gravitational lensing, can be used to study distant faint sources, as well as the properties of the objects acting as lenses. Furthermore, time-delay measurements between lensed images of supernova explosions can be used to measure the Hubble constant, i.e., the expansion rate of the Universe. Various recent results involving gravitational lensing of supernovae will be discussed, including the discovery of the first multiply-imaged “standard candle” supernova, iPTF16geu. An intriguing realization is that supernova searches, even from astronomical facilities with rather poor angular resolution, can locate extremely rare astronomical systems exhibiting strong gravitational lensing, and probe angular scales too small to be resolved even by the sharpest space observatories.