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:
COLLOQUIUM: EXPERIMENTAL TESTS OF THE NO-HAIR THEOREMS OF BLACK HOLES
(Tuorla Observatory, University of Turku and Helsinki Institute of Physics)
Oskar Klein Auditorium ()
Oskar Klein Auditorium
One of the most extreme predictions of General Relativity is the existence
of a physical singularity, a black hole. Does it really exist? It is not
enough to find a compact dark body in space, such as the over 3 million
solar mass body in the Galactic centre, but one must also demonstrate
that it satisfies the no-hair theorems of black holes (Israel, Carter,
Hawking). Thorne (1980) suggested a simple way to prove the theorems
in a binary system: determine the mass, spin and the quadrupole moment
of the suspected black hole. For a real black hole these quantities
are connected to each other in a definite way which is different from
neutron stars or other material bodies. The first test of the no-hair
theorems using the binary black hole system in OJ287 has now been carried
out. We will describe this system, the current level of the test and
possibilities of improving the error limits in future. References:
Valtonen et al. ApJ 709, 725 (2010), CeMDA 106, 235 (2010).