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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').
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"

38 results found.

  1. GRB 120326A, the review of the sky area in plate archives
  2. GRB 120326A: Bassano Bresciano Observatory - correction for GCN Cir 13178
  3. GRB 120326A: Cima Rest and Bassano Brescia
  4. GRB 120326A: HCT optical observations
  5. GRB 120326A: EVLA Observations
  6. GRB 120326A: Bassano Bresciano Observatory lightcurve analisis
  7. GRB 120326A: MITSuME Ishigakijima Optical Observation at 3 days afterthe burst
  8. GRB 120326A : Suzaku WAM observation of the prompt emission
  9. GRB 120326A: CARMA 3mm detection
  10. GRB 120326A: Bassano Bresciano Observatory optical observations
  11. GRB 120326A: MITSuME Ishigakijima Optical Observation at 2 days afterthe burst
  12. GRB 120326A: Bassano Bresciano Observatory further optical observations
  13. GRB 120326A: MITSuME Ishigakijima Optical Observation
  14. GRB 120326A: Xinglong TNT further optical observation��correction for GCN Cir 13149)
  15. GRB 120326A: Xinglong TNT further optical observation
  16. GRB 120326A: Fermi GBM Observation
  17. GRB 120326A: PAIRITEL NIR Observations
  18. GRB 120326A: Bassano Bresciano Observatory optical observations
  19. GRB 120326A: LOAO R-band Observations
  20. GRB 120326A : SMA submm observation
  21. GRB 120326A: Maisoncelles Observatory optical observations
  22. GRB 120326A: optical observation of GMG
  23. GRB 120326A : LOT optical observation
  24. GRB 120326A: Swift-BAT refined analysis
  25. GRB 120326A: T17 optical observations
  26. GRB 120326A: GTC redshift
  27. GRB 120326A: CQUEAN grizY Observation
  28. GRB 120326A: Swift-XRT refined Analysis
  29. GRB 120326A: Swift/UVOT Detection
  30. GRB 120326A: Optical observations at Crni Vrh
  31. GRB120326A: IAC80 observations
  32. GRB 120326A: Liverpool Telescope observations
  33. GRB 120326A: Enhanced Swift-XRT position
  34. Skynet/Dolomiti Observations of GRB120326A
  35. GRB 120326A: TAROT Calern observatory afterglow optical decay
  36. GRB 120326A: TAROT Calern observatory afterglow optical detection
  37. GRB 120326A: ROTSE-III Optical Limits
  38. GRB 120326A: Swift detection of a burst

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