Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

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').

13 results found.

  1. GRB 120106A: optical upper limit
  2. GRB 120106A: MITSuME Okayama Optical Observation (update)
  3. GRB 120106A: Swift/UVOT Upper Limits
  4. GRB 120106A: Bassano Bresciano Observatory optical observations
  5. GRB 120106A: MITSuME Okayama Ks-band upper limit
  6. GRB 120106A: MASTER Early OT marginally detection
  7. GRB 120106A: Swift-XRT refined Analysis
  8. GRB 120106A: Swift-BAT refined analysis
  9. GRB 120106A: MITSuME Okayama Optical upper limits
  10. GRB 120106A: Enhanced Swift-XRT position
  11. GRB 120106A: TAROT Calern observatory optical observations
  12. GRB 120106A: MASTER-Tunka optical observations
  13. GRB 120106A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive:
Looking for U.S. government information and services? Visit USA.gov