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.


6th May 2020: Sectors 20 and 21 data have been updated

The TESS Sectors 20 and 21 data have been updated to a newer version following the discovery of some errors in the previously released data. This includes revisions to the time-stamps (of roughly 2s) and collateral pixel data. Please see the "memos", which are available under "Documentation and Help", for the details.

Both the new and old versions of the data are available on the TASOC website, and the older version can be found by going to the "Data Search" and unchecking the "Only return files from newest data releases" box under the "Files" tab.

Sectors 1-19 will also be re-released during the coming time, and these will also be made available in TASOC as soon as possible.

22nd Apr 2020: Data file access problems

Due to some network problems in Aarhus, the TASOC website is currently experiencing problems with accessing data files on our file-servers, so download of files is currently not possible.
We are working hard on fixing the issues, and apologize for the inconvenience!

17th Apr 2020: Network interruptions in the weekend 17-19 April

Due to scheduled maintenance, we may experience network outages during the weekend where TASOC, or access to files may not be available.


13th May 2020: Second TESS Weekly Bulletin

STATUS UPDATE: We are now observing in sector 25!

Welcome TESS followers to second news bulletin! This week we have an exciting announcement about Stellar Pulsations, plus an additional three papers published to arXiv.org.

  1. Very regular high-frequency pulsation modes in young intermediate-mass stars (Bedding et al., 2020) : Some stars …

Read more

6th May 2020: First TESS Weekly Bulletin

STATUS UPDATE: Sector 23 data went live at MAST this week and we are currently observing in Sector 24 until May 12.

Welcome TESS followers! We here in the TESS GI office plan to issue weekly news bulletins to keep you informed of all things TESS related and to also …

Read more

22nd Apr 2020: Replacement of Sectors 20 and 21 data

Sectors 20 and 21 will be replaced with newly exported data files starting April 2020. During the ingest the data files will be a disparate set of both the original and new files. Upon completion of the ingest the check boxes in the data holdings table on the MAST website …

Read more

TESS mission clock

Launch Countdown:

Where is TESS right now?

Tweets from TESS