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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.

Lucene Examples (click to copy):

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

47 results found.

  1. GRB 111228A: possible detection of the SN with the TNG
  2. GRB 111228A, the review of the sky area in plate archives
  3. GRB 111228A: Possible host detected by Swift/UVOT
  4. GRB 111228A: optical observations
  5. GRB111228A :LOAO R-band Observations
  6. GRB 111228A: optical observations in CrAO
  7. GRB 111228A, optical observations
  8. GRB 111228A: LOAO Optical Observation
  9. Konus-Wind observation of GRB 111228A
  10. GRB 111228A: MASTER-Net optical photometry
  11. GRB 111228A: correction for GCN 12787
  12. GRB 111228A: Optical and NIR observations with Kanata telescope
  13. GRB 111228A: correction to GCN 12784
  14. GRB 111228A: SMARTS optical/IR afterglow observations
  15. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  16. GRB111228A: Further GMG observations
  17. GRB 111228A: Liverpool Telescope Observations
  18. GRB 111228A: P60 Observations
  19. GRB 111228A: X-shooter spectroscopy
  20. GRB 111228A: T100 observations
  21. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  22. GRB 111228A: GMG optical observation
  23. GRB 111228A: Swift-XRT refined Analysis
  24. GRB 111228A: NOT redshift
  25. GRB111228A: TNG spectroscopy analysis
  26. GRB 111228A: Gemini South Redshift
  27. GRB 111228A: PAIRITEL NIR Detection
  28. GRB 111228A: MMT Redshift
  29. GRB 111228A: TAROT La Silla observatory observations
  30. GRB 111228A: GROND observations
  31. GRB 111228A: MASTER OT observations
  32. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  33. GRB 111228A: GRAS017 optical observations
  34. GRB 111228A: IAC80 BVI-band observations
  35. GRB 111228A: Swift/UVOT Detection
  36. GRB 111228A: Skynet/Dolomiti Optical Observations
  37. GRB 111228A: NOT optical observation
  38. GRB 111228A, Swift-BAT refined analysis
  39. GRB 111228A: optical observations
  40. GRB 111228A: Enhanced Swift-XRT position
  41. GRB 111228A: TAROT Calern observatory. OT decay stopped
  42. GRB 111228A, optical observations
  43. GRB 111228A: Fermi GBM observation
  44. GRB 111228A: TAROT Calern observatory. OT seems still bright
  45. GRB 111228A: Possible host galaxy in the SDSS arhive
  46. GRB 111228A: Xinglong TNT confirms the optical afterglow
  47. GRB 111228A: Swift detection of a burst with an optical counterpart

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