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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"

36217 results found.

  1. INT+WFC observations of GRB 061126
  2. GRB 061126: Possible Jet Break
  3. GRB 061121: Second Epoch ATCA Radio Observations
  4. GRB 061126: RAPTOR Optical Detection During Gamma-Ray Emission
  5. GRB 061121: ATCA & WSRT Radio Observations
  6. GRB061121: optical observations
  7. GRB 061126: Early Super-LOTIS Observations
  8. GRB 061126: optical observation
  9. GRB 061126: Tautenburg afterglow observations
  10. GRB 061126 : SDSS Pre-Burst Observations
  11. GRB 061126: Swift-XRT refined analysis
  12. GRB 061126: Swift/UVOT Observations
  13. GRB 061126, Swift-BAT refined analysis
  14. GRB 061126: SARA Observations
  15. GRB 061126: Early Detection of the IR Afterglow
  16. GRB 061126: Faulkes Telescope North Optical Observations
  17. GRB 061126: Swift/UVOT Afterglow Detection
  18. GRB 061126: XRT position
  19. GRB 061126: Swift detection of a burst
  20. GRB 061121: MDM Continued Monitoring
  21. GRB 061122: Confirmation of X-ray/Optical Afterglow
  22. GRB 061121: MDM Continuing Optical Decay
  23. GRB061121: optical observations
  24. GRB 061122: Candidate Optical Afterglow
  25. GRB 061121: Ep,i - Eiso correlation
  26. GRB 061121: MDM Optical Decay
  27. GRB061122: Swift/UVOT Optical Observations
  28. GRB 061121: ART detection in Ic
  29. GRB061121: P60 Observations
  30. Radio detection of GRB 061121
  31. GRB061122: Swift-XRT position
  32. Konus-Wind observation of GRB 061122
  33. GRB 061121: MDM Optical Observations
  34. GRB 061121 declared "Burst of Interest" by Swift team
  35. Konus-Wind and Konus-A observations of GRB 061121
  36. INTEGRAL results on GRB 061122
  37. Swift-BAT trigger 239987 is not a GRB
  38. GRB 061122A: a long GRB detected by INTEGRAL
  39. GRB 061121: Swift/UVOT Observations
  40. GRB 061121: Swift-XRT Team Refined Analysis
  41. GRB 061121, Swift-BAT refined analysis
  42. GRB 061121 : Planned XMM-Newton observation
  43. GRB 061121: Optical observation at the KANATA 1.5m telescope
  44. GRB 061121: Faulkes Telescope North Optical Observation
  45. GRB061121: Spectroscopic Redshift
  46. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  47. GRB 061121: Swift detection of a bright burst with an optical counterpart
  48. GRB 060605: NIR Observations
  49. GRB 050915B: optical afterglow
  50. GRB 060111B: Swift UVOT Refined Magnitudes
  51. GRB061110A: Correction to GCN5817
  52. GRB 061110A: refined R-band analysis
  53. GRB 061110B: NIR Observations
  54. Swift TOO observations of GRB061110A
  55. Swift/UVOT Upper Limits for GRB061110b
  56. Swift/UVOT Upper Limits for GRB061110a
  57. GRB 061110A - VLT tentative redshift
  58. GRB 061110B: Swift XRT refined analysis
  59. GRB 061110B, Swift-BAT refined analysis
  60. GRB 061110B: VLT redshift
  61. GRB061110B: Optical observations at Crni Vrh
  62. GRB 061110B: NOT optical observations
  63. GRB 061110A: Swift XRT refined analysis
  64. GRB 061110B: Swift/XRT position
  65. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  66. GRB 061110B: Swift-UVOT Initial Observation
  67. GRB 061110A, Swift-BAT refined analysis
  68. GRB 061110B: TAROT Calern observatory optical observations
  69. GRB 061110B: Swift detection of a burst
  70. GRB 061110: NOT observations
  71. GRB 061110: Candidate confirmed
  72. GRB 061110 : Optical afterglow candidate
  73. GRB 061110: ROTSE-III Optical Limits
  74. GRB 061110: Swift detection of a burst
  75. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  76. GRB 061109: optical observation
  77. GRB 061109: TAROT Calern observatory optical observations
  78. GRB 061109: Swift detection of a possible burst
  79. GRB061028: MAGIC telescope GeV observation
  80. GRB 061027: TAROT La Silla observatory optical observations
  81. GRB 061007: Third Epoch ATCA Radio Observations
  82. GRB061019: second epoch CrAO observations
  83. GRB 061028: Swift/XRT Astrometry Correction
  84. GRB 061102: Swift/UVOT Magnitude Upper Limits
  85. GRB 061102, XRT refined analysis
  86. GRB 061004: Further VLT/NTT observations
  87. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  88. GRB061102B: Super-LOTIS observations
  89. GRB 061028: Optical R passband observations
  90. GRB 061102B: Swift detection of a possible burst
  91. GRB 061102, Swift-BAT refined analysis
  92. GRB 061102: Swift detection of a burst
  93. GRB 061028: VLA Observation
  94. GRB 061004: Swift/XRT Astrometry Correction
  95. GRB 060801: Swift/XRT Astrometry Correction
  96. GRB 061028: Futher P200 Observations
  97. GRB 061028: MDM Observations
  98. GRB 061028: P200 Observations
  99. GRB 061028: SARA upper limit
  100. GRB 061028: z band imaging

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