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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"

32769 results found.

  1. GRB 061217, Candidate host galaxy
  2. GRB 061217 - Swift/XRT position correction
  3. GRB 061210: Possible Host Galaxy (S2-G2) Keck Spectrum
  4. GRB 061201: Correction to GCN 5944
  5. GRB 061201: Magellan Redshift of nearby Abell cluster
  6. GRB 061218: TAROT La Silla observatory optical observations
  7. GRB 061217: TAROT Calern observatory optical observations
  8. GRB 061218: TORTOREM optical upper limits
  9. GRB 061218, Swift-BAT refined analysis
  10. GRB061217: VLT NIR observations
  11. GRB 061218, SMARTS optical/IR observations
  12. GRB 061218: REM prompt observations
  13. GRB 061217, SMARTS optical observations
  14. GRB061217: Swift/UVOT refined analysis.
  15. GRB 061217: optical observations at Calar Alto
  16. GRB061217 - Swift/XRT refined analysis
  17. GRB 061217, Further Swift-BAT refined analysis of the short hard burst
  18. GRB 061217, Swift-BAT refined analysis
  19. GRB 061217: Magellan Observations
  20. GRB 061217: REM prompt observations
  21. GRB 061217: ROTSE-III Optical Limits
  22. GRB 061210: MDM Follow-up Observation
  23. GRB061210: Swift/UVOT observations
  24. Swift-BAT Trigger 250908 is a Cosmic Ray Shower event
  25. GRB 061210: Optical sources near XRT positions
  26. GRB 061210: Swift XRT analysis - Possible counterparts
  27. GRB 061210 : Faulkes North Telescope optical limit
  28. GRB 061214(?): ROTSE-III Optical Limits
  29. GRB 061210: Suzaku WAM observation of the prompt emission
  30. Swift/BAT trigger #250033 is due to a known source during loss of
  31. GRB 061213: MASTER-VWF-Kislovodsk OT candidate retraction
  32. GRB 061210: Gemini/GMOS Observations
  33. GRB 061126: Radio Observations
  34. GRB061210: Radio Observations
  35. GRB061201, VLT optical decay: correction
  36. GRB 061126: a GRB detected off-axis by INTEGRAL
  37. GRB 061202: Suzaku WAM observation of the prompt emission
  38. GRB 061210: MDM Observation
  39. GRB 061210, Swift-BAT refined analysis of the SHB
  40. GRB 061210: Swift-BAT detection of a short burst
  41. Optical Afterglow observations of GRB 061126
  42. GRB061126: optical observations
  43. GRB 060926: MASTER: discovery of the optical flare
  44. GRB061126: update on the Swift-XRT afterglow light curve
  45. Corrections for Swift/UVOT Exposure Times for GRBs 061110B and 061121
  46. GRB 061201: UVOT Observations of a Fading Optical Afterglow
  47. GRB 061202: TORTOREM optical upper limits
  48. GRB 061201: VLT optical decay
  49. GRB 061201: SOAR Confirmation of Candidate Afterglow
  50. GRB061126 : NMSU 1.0m observations
  51. GRB 061202: Swift XRT refined analysis
  52. GRB061202: FRAM early follow-up limit
  53. Konus-Wind observation of GRB 061201
  54. GRB061202: optical/NIR observations with REM
  55. GRB061202: Swift/UVOT Upper Limits
  56. GRB 061202, Swift-BAT refined analysis
  57. GRB 061201: Swift XRT Team refined analysis
  58. GRB 061201: VLT optical observations
  59. GRB 061201: Initial UVOT Observations
  60. GRB 061201, Swift-BAT refined analysis of the SHB
  61. GRB 061122: GETS observation
  62. GRB 061121, SMARTS optical/IR observations
  63. GRB 061121: flattening of the decay
  64. INT+WFC observations of GRB 061126
  65. GRB 061126: Possible Jet Break
  66. GRB 061121: Second Epoch ATCA Radio Observations
  67. GRB 061126: RAPTOR Optical Detection During Gamma-Ray Emission
  68. Swift XRT on-board boresight update
  69. GRB 061121: ATCA & WSRT Radio Observations
  70. GRB061121: optical observations
  71. GRB 061126: Early Super-LOTIS Observations
  72. GRB 061126: optical observation
  73. RHESSI Spectrum of GRB061126
  74. GRB 061126: Tautenburg afterglow observations
  75. GRB061126: Optical afterglow observations from MIRO
  76. GRB061126: Optical afterglow observations from MIRO
  77. GRB 061126 : SDSS Pre-Burst Observations
  78. GRB 061126: Swift-XRT refined analysis
  79. GRB 061126: Swift/UVOT Observations
  80. GRB 061126, Swift-BAT refined analysis
  81. GRB 061126: SARA Observations
  82. GRB 061126: Early Detection of the IR Afterglow
  83. GRB 061126: Faulkes Telescope North Optical Observations
  84. GRB 061121: MDM Continued Monitoring
  85. GRB 061122: Confirmation of X-ray/Optical Afterglow
  86. GRB 061121: MDM Continuing Optical Decay
  87. GRB061121: optical observations
  88. GRB 061122: Candidate Optical Afterglow
  89. GRB 061121: Ep,i - Eiso correlation
  90. GRB 061121: MDM Optical Decay
  91. GRB061122: Swift/UVOT Optical Observations
  92. GRB 061121: ART detection in Ic
  93. GRB061121: P60 Observations
  94. Radio detection of GRB 061121
  95. GRB061122: Swift-XRT position
  96. Konus-Wind observation of GRB 061122
  97. GRB 061121: MDM Optical Observations
  98. GRB 061121 declared "Burst of Interest" by Swift team
  99. RHESSI Spectrum of GRB061121
  100. Konus-Wind and Konus-A observations of GRB 061121

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