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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"

18465 results found.

  1. GRB 981226 optical observations
  2. GRB 981220, radio observations
  3. GRB 981220
  4. GRB 980326/Host Galaxy
  5. BeppoSAX NFI Observation of GRB980425
  6. GRB980329 R,I flux calibration and R,I,K upper limits
  7. GRB980425 Optical Follow-up
  8. GRB970508 optical observations
  9. GRB980519, Optical Observations
  10. GRB980703 optical photometry
  11. GRB980703 optical observations
  12. GRB980703 Transient Optical Follow-Up
  13. GRB980703: LOTIS observation at early times
  14. BeppoSAX NFI observations of GRB 980703
  15. GRB 980703: ASM Position & Intensity
  16. GRB980703 optical followup
  17. Radio observations of SGRs
  18. SGR1900+14 field optical observations
  19. GRB 980613: Optical transient and its host galaxy
  20. GRB 980613: Detection of the probable host galaxy
  21. GRB 980613 Optical Observations
  22. GRB 980613 optical observations
  23. Discovery of a new SGR source, SGR1627-41
  24. GRB980613 Optical Observations
  25. GRB980613 observations from Palomar
  26. GRB980613 BeppoSAX-NFI follow up
  27. GRB980613 Near Infra-Red Observations
  28. GRB971214 Secondary Standards
  29. GRB980519 Secondary Standards
  30. GRB 980519 Optical Observations
  31. GRB 980519
  32. GRB980519 optical observations
  33. GRB 980519 Optical Observations
  34. GRB970519, optical follow-up at Schmidt Calern
  35. GRB980519 Optical Observations
  36. GRB 980519 Optical Observations
  37. GRB980515, BeppoSAX IAUC to be submitted
  38. BSAX Observations of GRB980425 field
  39. SAX J0840.7+2248 Optical Observations
  40. GRB980425: optical obs.
  41. GRB980425: Radio Observations
  42. report on BSAX observations of GRB980425
  43. GRB 980329 ROSAT observation
  44. GRB980326 X-ray Observations
  45. GRB980326, optical observations
  46. GRB980326, optical observations
  47. GRB980329 Keck K-band observations
  48. GRB980326 optical observations
  49. GRB980329 optical observations
  50. GRB980329 VLA observations
  51. GRB980329 optical observations
  52. GRB980326 optical observations
  53. Optical Observations of GRB 970508
  54. Near-IR follow-up on GRB 971227
  55. Optical Observations of the GRB 971227 field
  56. Optical Observations on GRB 971227
  57. GRB971227: Plaskett R-band observations
  58. GRB 971227: Optical clarifications
  59. GRB971227: Further CAHA R-band images
  60. GRB971227: LOTIS observations
  61. GRB971214: Optical Observations and Calibrations
  62. GRB 971214: Optical Observations
  63. Radio Observations of GRB 971214 at the VLA
  64. GRB 971024: KPNO Optical Observations
  65. GRB 970828: Palomar Observations

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