TASOC and other services were down for an hour or so last night due to problems at the main IT services at Aarhus University. We apologize of any inconvenience this may have caused.
The TESS spectral response function has been made available on the "Resources" page under "Information".
We have made a search-interface for you to easily search the TESS Input Catalog (TIC) for target stars. The TIC contains close to 600 million objects. Simply click the "TIC Search" tab at the top of the page. You will then be able to search the TIC using a wide range of parameters, and download the results in an ASCII-table for further work.
Currently, we are only including the most important information from the TIC, so if you have any requests for additional information we should include in the search-interface, please let us know.