Swift TDRSS Messages

Description

This database table is derived from the Swift TDRSS messages sent on ground soon after a BAT trigger occurs on-board. For each trigger there are associated up to 14 messages, however not all are always generated and sent on ground. The messages are generated on board by the BAT, XRT and UVOT instruments and the Figure of Merit part of the observatory's autonomy. The BAT and XRT can each have five different message types. The UVOT and FOM can each have two different message types. These TDRSS messages are the results of the on-board data processing of the three instruments and some contain data products. They are first distributed via the GCN and later archived. The BAT messages are: alert, 'ack' containing the position, or 'nack' if the position could not be calculated, a lightcurve and scaled map. The XRT messages are: centroid containing the position, an image (if the position has been calculated), centroid error if the position could not be calculated, spectra in Low Rate Photodiode and Windowed Timing modes, a lightcurve. The UVOT messages are: finding chart containing star positions and a subimage centered on the XRT position. The FOM messages are used to indicate if the FOM will or will not observe the new target and if the spacecraft will (or will not) request a slew for the new target. The parameters in this database table are a collection of high level information taken from the following messages : the BAT alert, 'ack' or 'nack' message, the FOM messages, the XRT position and image. If the information is not available the fields are left blank. All messages are provided as data products within this database table. This database table is generated at the Swift processing site. During operation, it is updated on daily basis. This is a service provided by NASA HEASARC .

Resources

Name Format Description Link
5 https://heasarc.gsfc.nasa.gov%2Fxamin%2Fvo%2Fcone%3Fshowoffsets%26table%3Dswifttdrss%26
5 https://heasarc.gsfc.nasa.gov%2FW3Browse%2Fall%2Fswifttdrss.html
21 swifttdrss.html https://heasarc.gsfc.nasa.gov/W3Browse/all/swifttdrss.html
5 https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=swifttdrss&
21 swifttdrss.html https://heasarc.gsfc.nasa.gov/W3Browse/all/swifttdrss.html
5 https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=swifttdrss&

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