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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"

43846 results found.

  1. GRB 060516: Refined analysis of the Swift-BAT burst
  2. GRB 060512: TNG optical spectroscopy
  3. GRB 060516: Swift detection of a burst
  4. GRB060515: P200 NIR Observations
  5. GRB 060505 BAT refined analysis
  6. GRB 060515 BAT refined analysis
  7. GRB 060512: TAROT optical observation
  8. GRB 060515: Swift/XRT Team refined analysis
  9. GRB 060515: Swift/UVOT Upper Limits
  10. GRB 060515: Swift/XRT position
  11. GRB 060515: Super-LOTIS Observations
  12. GRB060515: Swift/UVOT initial observation
  13. GRB 060515: TAROT optical observation
  14. GRB 060515: ROTSE-III Optical Limits
  15. GRB 060515: Swift detection of a burst
  16. VLT optical spectroscopy of GRB 060512
  17. Swift/UVOT observations of GRB060512.
  18. GRB 060512: Subaru NIR observation
  19. GRB060512: Swift XRT Team refined analysis
  20. GRB 060512: 1.54m Kuiper Observations
  21. GRB 060512: Detection of NIR afterglow
  22. GRB 060512: P60 Observations
  23. GRB 060512: Swift-BAT Refined Analysis
  24. GRB 060505 - OT candidate + galaxy spectrum
  25. GRB 060512: optical decay
  26. GRB060512 - SDSS Pre-Burst Observations
  27. GRB060512 Name Correction: LT Afterglow detection
  28. GRB060512: Liverpool Telescope Afterglow detection
  29. GRB 060512: Swift detection of a burst with an optical afterglow
  30. GRB 060505: X-ray afterglow - Correction -
  31. GRB 060505: X-ray afterglow
  32. Konus-Wind observation of GRB 060510A
  33. GRB060418: optical observations
  34. GRB 060428a, SMARTS optical/IR afterglow detection
  35. GRB060510B: Swift XRT refined analysis
  36. GRB 060510B: Swift/UVOT Upper Limits
  37. GRB 060510A: Refined analysis of the Swift-BAT burst
  38. GRB 060510B: Swift-BAT Refined Analysis
  39. GRB060510A: XRT refined analysis
  40. GRB060510 - SDSS Pre-Burst Observations
  41. GRB 060510b: Redshift
  42. GRB060510B : Faulkes North Telescope detection
  43. GRB 060510b: Gemini NIR observations
  44. GRB 060510B: Super-LOTIS Observations
  45. GRB 060510B: MDM Observations and candidate OT
  46. GRB 060510B: Swift detection of a burst
  47. GRB 060510: Swift detection of a burst with optical transient
  48. GRB060507: optical afterglow detection
  49. GRB060502B: improvement in the XRT afterglow position
  50. GRB 060507: Final Refined analysis of the Swift-BAT burst
  51. GRB 060507: Swift-BAT Refined Analysis
  52. GRB 060505: PROMPT Observations
  53. GRB 060507: Swift/UVOT Upper Limits
  54. GRB 060507: Swift XRT Team Refined Analysis
  55. GRB 060507: MDM Optical Upper Limit
  56. GRB060507: Swift XRT position
  57. GRB 060507: Swift detection of a burst
  58. GRB 060429: Suzaku WAM observation
  59. GRB 060505: Swift XRT Team Refined Analysis
  60. GRB060425: new MASTER survey method
  61. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  62. GRB 060505: Swift XRT afterglow canditate position
  63. GRB 060502b: Second epoch Gemini observations
  64. GRB 060505: Swift-BAT detection of a weak burst
  65. GRB 060428B: spectroscopy
  66. GRB 060502B MDM Follow-up Observation
  67. GRB 060502b: Gemini imaging and spectroscopy
  68. GRB 060502B: Swift/UVOT upper limits
  69. GRB 060502A: Swift/UVOT source detection
  70. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  71. GRB 060502B: MDM Optical Observation
  72. GRB 060502B: Refined analysis of the Swift-BAT short burst
  73. GRB060502B: Swift XRT Team refined analysis
  74. Short GRB 060502B: Tautenburg Observation
  75. GRB 060427B Milagro GeV/TeV Observations
  76. GRB 060502A: TTT Observations
  77. GRB060502B: correction to XRT position
  78. GRB 060501: P60 Observations and Candidate Retraction
  79. GRB 060502B: Xinglong optical observation
  80. GRB 060502B: Swift detection of a short burst
  81. GRB060502: Swift-XRT refined analysis
  82. GRB 060502: Swift-BAT refined analysis
  83. GRB060502: Gemini spectroscopy
  84. GRB 060502: APO Spectroscopic Observations
  85. GRB060501: Swift UVOT followup observations
  86. GRB060502: Super-LOTIS Observations
  87. GRB 060502: P60 Afterglow Confirmation
  88. GRB 060502: Swift detection of a burst with an optical counterpart
  89. GRB 060501: MDM Observations
  90. GRB060501: Super-LOTIS observations
  91. GRB060501: P60 imaging and afterglow candidate
  92. GRB 060501: Refined analysis of the Swift-BAT burst
  93. GRB060501: Swift XRT position
  94. GRB 060501: ROTSE-III Optical Limits
  95. GRB 060501: Swift detection of a burst
  96. IPN triangulation of GRB060429 (short/hard)
  97. Konus-Wind observation of GRB 060427B
  98. GRB060428B - SDSS Pre-Burst Observations
  99. GRB060428B: optical observation
  100. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.

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