Welcome to TESS Asteroseismic Science Operations Center

The TESS Asteroseismic Science Operations Center (TASOC) provides asteroseismological data from the NASA TESS mission to astronomers who are members of the TESS Asteroseismic Science Consortium (TASC). It is also the platform used to facilitate the international collaborations within TASC.

If you are a member of TASC, please log in below...

In order to have access to TASOC you have to be a member of TASC. Please see the "New TASC member" page on how to become a member.


15th Jun 2020: Reprocessed TESS data for sectors 1-19

As you may have read in the news from the TESS Science Support Center, the TESS data from sectors 1-19 are going to be reprocessed and updated in the coming months. This will mean that as data is re-released, they will no longer be available on the MAST archive.
But fear not! On the TASOC archive, we will make sure that all previous versions of data will always be available, so you can always reproduce your TESS results.
See more here:

10th Jun 2020: Scheduled maintenance today, 13:00-16:00 CEST

We are doing some scheduled maintenance of our systems this afternoon, so data downloads will not be available for some time during that period.

29th May 2020: Did you miss an online event? Watch the recording!

We have now made it possible to watch recordings of online seminars and conferences (if they were recorded) under "Online Events".
Go see the very interesting seminar given by Tim Bedding on delta Scuti stars here:
If you have recordings of other online events that you would like to either host at TASOC or link to, please feel free to contact TASOC.


6th Jul 2020: TESS Weekly Bulletin: July 6th

STATUS UPDATE: We have started the extended mission! Thanks for everything, prime mission!

Welcome TESS followers to this week's news bulletin! This week we present two papers using TESS data.

The K2 & TESS Synergy I: Updated Ephemerides and Parameters for K2-114, K2-167, K2-237, & K2-261 (Ikwut-Ukwa, et. al., 2020): Within this …

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29th Jun 2020: TESS Weekly Bulletin: June 29th

STATUS UPDATE: AU Mic feature published! Check out details below.

Hello TESS followers and welcome to this week's news bulletin! This week we present four papers using TESS data.

A planet within the debris disk around the pre-main-sequence star AU Microscopii (Plavchan et. al., 2020): AU Microscopii (AU Mic) is …

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23rd Jun 2020: TESS Weekly Bulletin: June 23th

STATUS UPDATE: We have now started observing in Sector 26!

Hello TESS followers and welcome to this week's news bulletin! This week we present three papers using TESS data, on the archive.

TESS unveils the optical phase curve of KELT-1b. Thermal emission and ellipsoidal variation from the brown dwarf companion …

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TESS mission clock

Launch Countdown:

Where is TESS right now?