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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

13 results found.

  1. GRB 241002B: Swift-XRT afterglow detection
  2. GRB 241002B: PRIME near-infrared detection in 3rd epoch
  3. GRB 241002B: PRIME near-infrared detection in 2nd epoch
  4. GRB 241002B: Fermi GBM Observation
  5. GRB 241002B: Swift-XRT observations
  6. GRB 241002B: Swift/BAT-GUANO localization skymap of a burst
  7. GRB 241002B: Swift ToO observations
  8. GRB 241002B: PRIME near-infrared detection
  9. GRB 241002B: GOTO24gpc/AT 2024xbg follow-up observations update
  10. GRB 241002B: ULL-ASTRO-MASTER LCOGT 0.4m + QHY600 detection of the GOTO optical counterpart candidate AT 2024xbg / GOTO24gpc
  11. GRB 241002B: GOTO optical counterpart candidate
  12. Fermi GRB 241002B: Global MASTER-Net observations report
  13. GRB 241002B: Fermi GBM Final Real-time Localization

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
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Open an issue.
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