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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"

23733 results found.

  1. GRB 120724A, Swift-BAT refined analysis
  2. GRB 120724A: FTN optical afterglow candidate
  3. GRB 120724A: Swift detection of a burst
  4. GRB 120722A: GROND detection of the afterglow
  5. GRB 120722A: Swift-BAT refined analysis
  6. GRB 120722A: Swift detection of a burst
  7. GRB 120716A: EVLA Detection
  8. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  9. Konus-Wind observation of GRB 120716A
  10. IPN Triangulation of unusual GRB 120716A
  11. GRB 120711A: ATCA 34GHz final observations (upper limit)
  12. GRB 120714B: Swift/UVOT Detection
  13. GRB 120714B: Swift-XRT refined Analysis
  14. GRB120714A: Swift/UVOT upper limits
  15. GRB 120714B: Swift-BAT refined analysis
  16. GRB 120714A: GROND upper limits
  17. GRB 120714B: GROND confirmation of fading afterglow
  18. GRB 120624B: VLA Observations
  19. GRB 120714A: Swift-BAT refined analysis
  20. GRB 120714B: Swift detection of a burst
  21. GRB120711B: MITSuME Ishigakijima upper limits
  22. GRB 120714A: Swift detection of a burst
  23. GRB 120711A: ATCA 34GHz further observations (upper limit)
  24. IPN Triangulation of GRB 120709A
  25. GRB 120712A: Swift/UVOT Detection
  26. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  27. GRB 120712A: Swift-BAT refined analysis
  28. GRB 120712A: Swift detection of a burst with optical afterglow
  29. GRB 120711B: Swift-XRT refined Analysis
  30. GRB 120711A: ATCA 34GHz upper limit
  31. GRB 120711B: Swift-BAT refined analysis
  32. GRB 120711B: Swift/UVOT Upper Limits
  33. GRB 120711A: Swift/UVOT Observations
  34. Konus-Wind observation of GRB 120711A
  35. Konus-Wind observation of GRB 120709A
  36. GRB 120711A: MAXI/GSC detection
  37. Continued Skynet/PROMPT observations of GRB120711A
  38. Swift detection of GRB 120711B or a new Galactic transient
  39. Skynet/PROMPT Observations of GRB120711A
  40. GRB 120709A: optical afterglow limits
  41. Konus-Wind observation of GRB 120707A
  42. IPN Triangulation of GRB 120707A
  43. GRB 120624B: mm detection at PdBI
  44. GRB 120703A: Swift-BAT refined analysis
  45. GRB 120624B Suzaku WAM observation of the prompt emission
  46. Konus-Wind observation of GRB 120703A
  47. GRB 120701A: GROND detection of the afterglow
  48. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  49. GRB 120701A: Swift-BAT refined analysis
  50. Swift Trigger 525554 is probably not a GRB
  51. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  52. GRB 120624B: GROND upper limits
  53. XRF 120626B: MAXI/GSC detection
  54. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  55. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  56. Swift detection of Ginga 0834-430
  57. Swift detection of IGR J17062-6143
  58. GRB 120624B, Swift-BAT refined analysis
  59. Konus-Wind observation of GRB 120624B
  60. Konus-Wind observation of GRB 120624A
  61. GRB 120624B: Fermi GBM detection
  62. IPN Triangulation of GRB 120624A (short/intense)
  63. Swift Trigger 524949: Noise fluctuation near a galaxy
  64. GRB 120622A: MAXI/GSC detection
  65. GRB 120602A: Suzaku WAM observation of the prompt emission
  66. Konus-Wind observation of GRB 120617A
  67. Swift triggers (#524542) on a Galactic source
  68. Konus-Wind observation of GRB 120602A
  69. IPN Triangulation of GRB 120602A (long/very bright)
  70. GRB 120614A: MAXI/GSC detection of a burst
  71. GRB 120612A: Swift-BAT refined analysis
  72. GRB 120612A: Swift detection of a burst
  73. GRB 120603A: Suzaku WAM observation of the prompt emission
  74. Konus-Wind observation of GRB 120603A
  75. IPN Triangulation of short GRB 120603A
  76. Konus-Wind observation of GRB 120528B
  77. GRB 120519A: Suzaku WAM observation of the prompt emission
  78. GRB 120528C: MAXI/GSC detection
  79. GRB 120521C redshift estimate
  80. GRB 120528B: MAXI/GSC detection
  81. GRB 120512A: Suzaku WAM observation of the prompt emission
  82. GRB120521B: SSO 2.3m upper limits
  83. Konus-Wind observation of GRB 120522A
  84. IPN triangulation of GRB 120522A (long/intense)
  85. GRB 120521A: ATCA 34GHz upper limit
  86. GRB 120521C: Early Tautenburg limits
  87. GRB 120521A: GROND Upper limits
  88. GRB 120521C: Swift-BAT refined analysis
  89. GRB 120521B: GROND Upper limits
  90. GRB 120521C: BOOTES-1 optical observations
  91. GRB 120521C: WHT optical observations
  92. GRB 120521C: TAROT Calern observatory optical observations
  93. GRB 120521C: Swift detection of a burst
  94. GRB 120521B: Swift-BAT refined analysis
  95. Konus-Wind observation of GRB 120519A
  96. IPN Triangulation of GRB 120519A (short/hard)
  97. GRB 120521A: Swift/UVOT Upper Limits
  98. GRB 120521A: Swift-BAT refined analysis
  99. GRB 120521B: TAROT La Silla observatory optical observations
  100. GRB 120521B: Swift detection of a burst

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