Notices and circulars

Notices and circulars are two standardized means for the SVOM mission of communicating with the worldwide community about SVOM detection of transient astrophysical events, with a particular emphasis on Gamma-Ray Bursts which is the core observation program of the mission.

Notices

SVOM VOEvent notices are brief XML-formatted text files transmitting essential data from a single instrument following the on-board detection of an event. They follow the IVOA standards of VOEvent format and are designed to be processed automatically in real-time, to pursue for a potential follow-up.

The SVOM French Science Center is responsible for the automated on-ground generation and real-time public broadcast of notices for all SVOM instruments

SVOM notices are publically broadcasted to the worldiwde scientific community via the NASA/GCN Kafka service. A private SVOM VOEvent Comet broker is also accessible to the members of the SVOM collaboration.The broker address and access rights can be provided upon request to svom-admin@cea.fr

More informations on the SVOM notices content can be found in the following sub-sections:

• Notices levels
• Common fields
• Trigger notices (N1)
• Refined notices (N2)
• VOEvent examples

Circulars

SVOM GCN circulars are short astronomical reports of a detection by one or more instruments aboard the satellite. They are written by the so-called Burst Advocates rapidly after the alert to give the first scientific assessment of a detection. They are broadcasted publically through the NASA/GCN service.

More informations on the SVOM circulars can be found in the following sub-sections:

• Circulars

Archives

Past SVOM notices and circulars can be consulted using the following links:

👉 SVOM notice archive on the FSC website

👉 SVOM circulars archive on the NASA/GCN website