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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"

28264 results found.

  1. GRB 080328: Enhanced Swift-XRT position
  2. GRB 080328: Swift detection of a burst with an optical counterpart
  3. GRB 080325: Subaru detection of NIR afterglow candidate
  4. GRB 080325: GROND Observations
  5. GRB 080325: Swift/UVOT Upper Limits
  6. GRB 080325: Early observations from OSN
  7. GRB 080325: NIR afterglow candidate
  8. GRB 080319D: GROND Detection of the Optical Counterpart
  9. GRB 080325: Enhanced Swift-XRT position
  10. GRB 080325: Swift detection of a burst
  11. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  12. GRB 080319B: Spitzer Mid-infrared Observations
  13. GRB 080319C: Suzaku WAM observation of the prompt emission
  14. Radio Detection of GRB 080319B
  15. GRB 080320, Swift-BAT refined analysis
  16. GRB 080319D: GROND Observations
  17. GRB 080319B: optical upper limit
  18. GRB 080319D: optical upper limit
  19. GRB 080319D, Swift-BAT refined analysis
  20. GRB 080319C: UVOT Observations
  21. GRB 080319B: UVOT Observations
  22. GRB 080319A: UVOT Observations
  23. GRB 080320: Swift XRT refined analysis
  24. GRB 080320: J detection with FLAMINGOS
  25. GRB 080319D: Swift XRT refined analysis
  26. GRB 080320: optical limit
  27. GRB 080320: Gemini-N optical afterglow
  28. GRB 080319C, Swift-BAT refined analysis
  29. GRB 080320: Enhanced Swift-XRT position
  30. GRB 080320 - SDSS Pre-Burst Observations
  31. GRB 080320: Swift detection of a burst
  32. GRB 080319B : Lulin observation of temporal break at 0.2 days
  33. GRB 080319C - SDSS Pre-Burst Observations
  34. GRB 080319A SDSS Pre-Burst Observations
  35. GRB080319B - SDSS Pre-Burst Observations
  36. GRB 080319A: Swift-XRT Team Refined Analysis
  37. GRB 080319B, Swift-BAT refined analysis
  38. GRB 080319C: Swift-XRT Team Refined Analysis
  39. GRB 080319B: Swift-XRT Team Refined Analysis
  40. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  41. GRB 080319C: AGILE-MCAL observation of the prompt emission
  42. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  43. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  44. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  45. GRB 080319B: TORTORA synchronous observation
  46. GRB 080319B: Enhanced Swift-XRT position
  47. GRB 080319A: Enhanced Swift-XRT position
  48. GRB 080319A, Swift-BAT refined analysis
  49. GRB 080319B: REM early data
  50. GRB 080319C: Swift detection of a burst with an optical afterglow
  51. GRB 080319A: REM observations
  52. GRB 080319B: Change in power law decay index
  53. GRB 080319B: Gemini-South Spectroscopy
  54. GRB 080319A: optical observations at the NOT
  55. GRB 080319B: REM observations
  56. GRB080319A: P60 Optical Afterglow Observations
  57. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  58. GRB 080319A: Swift detection of a burst
  59. Swift Trigger 306745 is not a GRB
  60. Swift Trigger 306616 is not a GRB
  61. GRB080315: Bok Optical Observations
  62. Swift/UVOT observations of GRB 080315
  63. Swift trigger 306323: Swift-BAT/XRT refined analysis
  64. GRB 080315: Optical observations
  65. GRB 080315: TAROT Calern observatory optical observations
  66. GRB 080315: Swift detection of a possible burst
  67. GRB 080307: GAO 150cm telescope Optical Observation
  68. GRB 080229A: GAO 150cm telescope Optical Observation
  69. GRB 080310, Swift-BAT refined analysis
  70. GRB080210: optical observations
  71. GRB 080310: Swift-XRT refined analysis
  72. GRB 080310: Swift/UVOT Refined Analysis
  73. GRB 080310 - SDSS Pre-Burst Observations
  74. GRB 080310: Enhanced Swift-XRT position
  75. GRB 080310: RRM optical photometry with the VLT
  76. GRB080310, optical observations with LBT
  77. GRB 080310: REM observations
  78. GRB 080310: Swift detection of a burst with optical afterglow
  79. GRB080307, optical upper limit
  80. GRB080229, optical upper limit
  81. GRB 080307: Swift-XRT Team refined analysis
  82. GRB 080307: Swift/UVOT Upper Limits
  83. GRB 080307, Swift-BAT refined analysis
  84. GRB080307 - SDSS Pre-Burst Observations
  85. GRB 080307: TNT optical observation
  86. GRB080307: Optical upper limits
  87. GRB 080307: Gemini-N i-band observations - candidate afterglow
  88. GRB 080307: retraction of UVOT candidate
  89. GRB 080307: Enhanced Swift-XRT position
  90. GRB 080307, Preliminary Swift-BAT refined analysis
  91. GRB 080307: Optical observation with DMC/KANATA
  92. GRB 080307: Swift detection of a burst
  93. VLA possible radio detection of GRB 080229
  94. GRB 080303, Swift-BAT refined analysis
  95. GRB080303: Swift XRT refined analysis
  96. GRB 080303: Enhanced Swift-XRT position
  97. Swift UVOT observations of GRB080229B
  98. GRB080229B: Swift XRT afterglow observation
  99. GRB 080303: Swift detection of a burst with optical afterglow
  100. GRB 080303: REM NIR afterglow candidate

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