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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

16 results found.

  1. GRB 100902A: D50 optical limit
  2. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  3. GRB 100902A: UKIRT JK Observation
  4. GRB 100902A: GROND observations; afterglow candidate
  5. GRB100902A: Optical upper limits at IAO
  6. GRB 100902A: Swift-BAT refined analysis
  7. GRB 100902A: 1.5m OSN I-band Upper Limits
  8. Tentative redshift of GRB100902A from Swift-XRT data
  9. GRB 100902A: Swift XRT refined analysis
  10. GRB 100902A: Swift/UVOT Upper Limits
  11. GRB 100902A: optical observation at Mt.Terskol
  12. GRB 100902A: Enhanced Swift-XRT position
  13. GRB 100902A: MASTER Prompt Optical Observations
  14. GRB 100902A: Faulkes Telescope South observations
  15. GRB 100902A: MASTER Optical Early Limit
  16. GRB 100902A: Swift detection of a burst


Download all Circulars as a .tar.gz archive:
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