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.


29th Jul 2020: TESS Weekly Bulletin: July 29th

Welcome TESS followers to our weekly news bulletin! This week we report on three new papers from the archive, in addition to a new and interesting website that will aid in TESS observations.

This week a new website was launched by the Space Telescope Science Institute (STScI), for the UV …

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20th Jul 2020: TESS Weekly Bulletin: July 20th

STATUS UPDATE: TESS Sector 25 data will be available this week, see here.

Welcome TESS followers to this week's news bulletin! This week we present three papers using TESS data from the archive.

HAT-P-58b -- HAT-P-64b: Seven Planets Transiting Bright Stars (Bakos et. al., 2020): In this paper the authors report …

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13th Jul 2020: TESS Weekly Bulletin: July 13th

STATUS UPDATE: The TESS target list for sector 27, which is the first sector of the extended mission, is now online and can be found here. We are also happy to announce that the TESS GI office will be hosting a special session at the 237th AAS Meeting (January 2021 …

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TESS mission clock

Launch Countdown:

Where is TESS right now?