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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"

32692 results found.

  1. GRB 061126: Swift-XRT refined analysis
  2. GRB 061126: Swift/UVOT Observations
  3. GRB 061126, Swift-BAT refined analysis
  4. GRB 061126: SARA Observations
  5. GRB 061126: Early Detection of the IR Afterglow
  6. GRB 061126: Faulkes Telescope North Optical Observations
  7. GRB 061121: MDM Continued Monitoring
  8. GRB 061122: Confirmation of X-ray/Optical Afterglow
  9. GRB 061121: MDM Continuing Optical Decay
  10. GRB061121: optical observations
  11. GRB 061122: Candidate Optical Afterglow
  12. GRB 061121: Ep,i - Eiso correlation
  13. GRB 061121: MDM Optical Decay
  14. GRB061122: Swift/UVOT Optical Observations
  15. GRB 061121: ART detection in Ic
  16. GRB061121: P60 Observations
  17. Radio detection of GRB 061121
  18. GRB061122: Swift-XRT position
  19. Konus-Wind observation of GRB 061122
  20. GRB 061121: MDM Optical Observations
  21. GRB 061121 declared "Burst of Interest" by Swift team
  22. RHESSI Spectrum of GRB061121
  23. Konus-Wind and Konus-A observations of GRB 061121
  24. INTEGRAL results on GRB 061122
  25. GRB 061121: Swift/UVOT Observations
  26. GRB 061121: Swift-XRT Team Refined Analysis
  27. GRB 061121, Swift-BAT refined analysis
  28. GRB061121, optical observation
  29. GRB 061121: Optical observation at the KANATA 1.5m telescope
  30. GRB 061121: Faulkes Telescope North Optical Observation
  31. GRB061121: Spectroscopic Redshift
  32. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  33. GRB 060605: NIR Observations
  34. GRB 050915B: optical afterglow
  35. GRB 060111B: Swift UVOT Refined Magnitudes
  36. GRB061110A: Correction to GCN5817
  37. GRB 061110A: refined R-band analysis
  38. GRB 061110B: NIR Observations
  39. Swift/UVOT Upper Limits for GRB061110b
  40. Swift/UVOT Upper Limits for GRB061110a
  41. GRB 061110B: Swift XRT refined analysis
  42. GRB 061110B, Swift-BAT refined analysis
  43. GRB 061110B: VLT redshift
  44. GRB 061110B: NOT optical observations
  45. GRB 061110A: Swift XRT refined analysis
  46. GRB 061110B: Swift/XRT position
  47. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  48. GRB 061110A, Swift-BAT refined analysis
  49. GRB 061110: ROTSE-III Optical Limits
  50. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  51. GRB 061109: optical observation
  52. GRB061028: MAGIC telescope GeV observation
  53. GRB 061007: Third Epoch ATCA Radio Observations
  54. GRB061019: second epoch CrAO observations
  55. GRB 061028: Swift/XRT Astrometry Correction
  56. GRB 061102: Swift/UVOT Magnitude Upper Limits
  57. GRB 061102, XRT refined analysis
  58. GRB 061004: Further VLT/NTT observations
  59. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  60. GRB061102B: Super-LOTIS observations
  61. GRB 061028: Optical R passband observations
  62. GRB 061102, Swift-BAT refined analysis
  63. GRB 061028: VLA Observation
  64. GRB 061004: Swift/XRT Astrometry Correction
  65. GRB 060801: Swift/XRT Astrometry Correction
  66. GRB 061028: Futher P200 Observations
  67. GRB 061028: MDM Observations
  68. GRB 061028: P200 Observations
  69. GRB 061028: SARA upper limit
  70. GRB 061028: z band imaging
  71. GRB061028: XRT refined analysis
  72. GRB 061028: Swift/UVOT Observations
  73. GRB 061028, Swift-BAT refined analysis
  74. GRB 061027, Swift refined analysis of a possible burst
  75. GRB061025: ROTSE-III Confirmation of Optical Counterpart
  76. GRB061025: Swift XRT refined analysis
  77. GRB061025: Swift/UVOT observations
  78. GRB 061019: MITSuME upper limits
  79. GRB 061025: REM observations
  80. GRB 061025: Gemini-S observations
  81. GRB061025: Swift XRT position
  82. GRB 061025: ROTSE-III Optical Limits
  83. Swift XRT boresight update
  84. GRB 061021, Swift-BAT Lag analysis
  85. Konus-Wind observation of GRB 061021
  86. GRB 061021 - VLT spectrum without lines
  87. GRB 061021: Swift-XRT refined analysis
  88. GRB 061021: Swift/UVOT Observation
  89. GRB 061021, Swift-BAT refined analysis
  90. GRB 061019: Super-LOTIS upper limit
  91. GRB060904b: optical observations
  92. GRB061019: optical observations
  93. GRB061019: optical observations
  94. GRB 061019: SARA upper limit
  95. GRB 060930: MARGE Optical Limits
  96. GRB 061019: Swift/UVOT upper limit
  97. GRB 061019: SMARTS afterglow confirmation
  98. GRB061019: Swift XRT refined analysis
  99. GRB 061019, Swift-BAT refined analysis
  100. GRB 061019: REM K-band candidate afterglow

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