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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"

45627 results found.

  1. GRB 061213: MASTER-VWF-Kislovodsk optical candidate
  2. GRB 061213: MASTER-VWF-Kislovodsk observations
  3. GRB 061210: Gemini/GMOS Observations
  4. GRB 061126: Radio Observations
  5. GRB061210: Radio Observations
  6. GRB061201, VLT optical decay: correction
  7. GRB 061126: a GRB detected off-axis by INTEGRAL
  8. GRB 061202: Suzaku WAM observation of the prompt emission
  9. GRB 061210: MDM Observation
  10. GRB 061210, Swift-BAT refined analysis of the SHB
  11. GRB 061210: Swift-BAT detection of a short burst
  12. Optical Afterglow observations of GRB 061126
  13. GRB061126: optical observations
  14. GRB 060926: MASTER: discovery of the optical flare
  15. GRB061126: update on the Swift-XRT afterglow light curve
  16. Corrections for Swift/UVOT Exposure Times for GRBs 061110B and 061121
  17. GRB 061201: UVOT Observations of a Fading Optical Afterglow
  18. GRB 061202: TORTOREM optical upper limits
  19. GRB 061201: VLT optical decay
  20. GRB 061201: SOAR Confirmation of Candidate Afterglow
  21. GRB061126 : NMSU 1.0m observations
  22. GRB 061202: Swift XRT refined analysis
  23. GRB061202: FRAM early follow-up limit
  24. GRB061202 optical limit by "Pi of the Sky"
  25. Konus-Wind observation of GRB 061201
  26. GRB061202: optical/NIR observations with REM
  27. GRB061202: Swift/UVOT Upper Limits
  28. GRB 061202, Swift-BAT refined analysis
  29. GRB 061202: Swift detection of a burst
  30. GRB 061201: Swift XRT Team refined analysis
  31. GRB 061201: VLT optical observations
  32. GRB 061201: Initial UVOT Observations
  33. GRB 061201, Swift-BAT refined analysis of the SHB
  34. GRB 061201: Swift detection of a short hard burst
  35. GRB 061201: Coincidence with a Galaxy Cluster
  36. GRB 061122: GETS observation
  37. GRB 061121, SMARTS optical/IR observations
  38. GRB 061121: flattening of the decay
  39. INT+WFC observations of GRB 061126
  40. GRB 061126: Possible Jet Break
  41. GRB 061121: Second Epoch ATCA Radio Observations
  42. GRB 061126: RAPTOR Optical Detection During Gamma-Ray Emission
  43. Swift XRT on-board boresight update
  44. GRB 061121: ATCA & WSRT Radio Observations
  45. GRB061121: optical observations
  46. GRB 061126: Early Super-LOTIS Observations
  47. GRB 061126: optical observation
  48. RHESSI Spectrum of GRB061126
  49. GRB 061126: Tautenburg afterglow observations
  50. GRB061126: Optical afterglow observations from MIRO
  51. GRB061126: Optical afterglow observations from MIRO
  52. GRB 061126 : SDSS Pre-Burst Observations
  53. GRB 061126: Swift-XRT refined analysis
  54. GRB 061126: Swift/UVOT Observations
  55. GRB 061126, Swift-BAT refined analysis
  56. GRB 061126: SARA Observations
  57. GRB 061126: Early Detection of the IR Afterglow
  58. GRB 061126: Faulkes Telescope North Optical Observations
  59. GRB 061126: Swift/UVOT Afterglow Detection
  60. GRB 061126: XRT position
  61. GRB 061126: Swift detection of a burst
  62. GRB 061121: MDM Continued Monitoring
  63. GRB 061122: Confirmation of X-ray/Optical Afterglow
  64. GRB 061121: MDM Continuing Optical Decay
  65. GRB061121: optical observations
  66. GRB 061122: Candidate Optical Afterglow
  67. GRB 061121: Ep,i - Eiso correlation
  68. GRB 061121: MDM Optical Decay
  69. GRB061122: Swift/UVOT Optical Observations
  70. GRB 061121: ART detection in Ic
  71. GRB061121: P60 Observations
  72. Radio detection of GRB 061121
  73. GRB061122: Swift-XRT position
  74. Konus-Wind observation of GRB 061122
  75. GRB 061121: MDM Optical Observations
  76. GRB 061121 declared "Burst of Interest" by Swift team
  77. RHESSI Spectrum of GRB061121
  78. Konus-Wind and Konus-A observations of GRB 061121
  79. INTEGRAL results on GRB 061122
  80. Swift-BAT trigger 239987 is not a GRB
  81. GRB 061122A: a long GRB detected by INTEGRAL
  82. GRB 061121: Swift/UVOT Observations
  83. GRB 061121: Swift-XRT Team Refined Analysis
  84. GRB 061121, Swift-BAT refined analysis
  85. GRB061121, optical observation
  86. GRB 061121 : Planned XMM-Newton observation
  87. GRB 061121: Optical observation at the KANATA 1.5m telescope
  88. GRB 061121: Faulkes Telescope North Optical Observation
  89. GRB061121: Spectroscopic Redshift
  90. GRB061121: Keck spectroscopic observations
  91. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  92. GRB 061121: Swift detection of a bright burst with an optical counterpart
  93. GRB 060605: NIR Observations
  94. GRB 050915B: optical afterglow
  95. GRB 060111B: Swift UVOT Refined Magnitudes
  96. Swift-BAT triggers 238544 and 238546 are not GRBs
  97. GRB 061110A: refined R-band analysis
  98. GRB 061110B: NIR Observations
  99. Swift TOO observations of GRB061110A
  100. Swift/UVOT Upper Limits for GRB061110b

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