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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"

23685 results found.

  1. GRB 081228: detection by GROND
  2. GRB 081228: TAROT Calern observatory optical observations
  3. GRB 081224: Suzaku WAM observation of the prompt emission
  4. GRB 081226: Second epoch of Gemini-South imaging
  5. GRB 081226A: Swift-BAT refined analysis
  6. GRB 081226B: a short-hard GRB detected by INTEGRAL
  7. GRB 081226: GROND afterglow candidate
  8. GRB 080810: optical observations
  9. GRB 081211B: optical observations
  10. GRB 081222: MITSuME optical observation
  11. GRB 080810: optical observations
  12. Konus-Wind observation of GRB 081222
  13. GRB 081221: GROND observations
  14. GRB 081222:Optical afterglow observation
  15. GRB 081222, Swift-BAT refined analysis
  16. GRB 081221, Swift-BAT refined analysis
  17. Konus-Wind observation of very bright GRB 081215A
  18. GRB081221: Fermi GBM observation
  19. Swift/UVOT observations of GRB 081221
  20. IPN triangulation of bright GRB 081215A
  21. GRB081203A: BTA observation
  22. Konus-Wind observation of GRB 081221
  23. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  24. GRB 081222: Swift detection of a burst with a bright optical afterglow
  25. GRB 081221: Swift detection of a burst
  26. GRB 081217: Fermi GBM detection
  27. Modification of Swift/UVOT response to bright GRBs
  28. GRB 081216: Suzaku WAM observation of the prompt emission
  29. GRB 081216 : Fermi GBM observation
  30. GRB 081215A: Fermi GBM detection
  31. IPN localization of short hard GRB 081216
  32. GRB 081118: Zadko observations
  33. GRB 081207: Fermi GBM detection
  34. GRB 081209: Fermi GBM detection
  35. GRB 081210: Xinglong TNT R band Upper Limits
  36. GRB 081211: Swift detection of a burst
  37. GRB081203B: optical observations
  38. GRB 081210: Swift-BAT refined analysis
  39. GRB 081210: Swift detection of a burst with optical afterglow
  40. Konus-Wind observation of GRB 081209
  41. IPN triangulation of short hard GRB 081209
  42. GRB 081203A: optical observations
  43. GRB 081206C: Fermi GBM detection
  44. GRB 081128: afterglow observations
  45. GRB 081203B: Suzaku WAM observation of the prompt emission
  46. GRB 081203B: Additional Gemini imaging
  47. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  48. GRB081203A: Optical observations at Ishigaki
  49. GRB 081204: GROND Observations
  50. GRB081203B: optical observations
  51. GRB081203A: MITSuME optical observation
  52. GRB 081203A: Skynet/GORT Detections
  53. GRB081203A: optical observation
  54. GRB 081204 : a long GRB localized by INTEGRAL
  55. Konus-Wind observation of GRB 081203A
  56. Konus-Wind observation of GRB 081203B
  57. GRB 081203B: optical observations
  58. GRB 081203A: optical observations
  59. Swift UVOT observations of GRB 081203A
  60. GRB081203A: Swift/UVOT grism redshift
  61. GRB 081203A: Burst detection from Swift-BAT slew data
  62. GRB 081203A: Swift-BAT refined analysis
  63. GRB 081130B: MASTER prompt optical observations
  64. GRB081203: optical observation
  65. GRB 081203: Swift detection of a burst with a bright optical counterpart
  66. GRB 081130B: Fermi GBM detection
  67. GRB 081126: afterglow photometry
  68. Trigger 335971: Swift possible detection of a burst
  69. GRB 081122B: Fermi GBM Detection
  70. GRB 081128: Swift-XRT refined analysis
  71. GRB081128: optical observations
  72. GRB 081128: Swift-BAT refined analysis
  73. GRB 081128: Swift detection of a burst
  74. GRB 081127: Swift-BAT refined analysis
  75. Konus-Wind observation of GRB 081126
  76. GRB 081127: Swift detection of a burst
  77. GRB 081126: optical observations
  78. GRB 081126: Swift-BAT refined analysis
  79. GRB 081126: TAROT Calern observatory optical observations
  80. GRB 081126: Swift detection of a burst
  81. GRB 081124: Fermi GBM detection
  82. GRB 081120: Fermi GBM detection
  83. GRB 081118: Fermi GBM detection.
  84. GRB 081122: Fermi GBM detection
  85. Konus-Wind observation of GRB 081121
  86. GRB 081121: Magellan Redshift
  87. GRB 081121: GROND observations
  88. GRB 081121: Swift-BAT refined analysis
  89. GRB 081121: Swift detection of a burst
  90. GRB 081119: Fermi GBM detection
  91. GRB 081118: GROND detection of afterglow
  92. GRB 081118: Swift-BAT refined analysis
  93. GRB 081118: Swift detection of a burst
  94. GRB 081109A: confirmation of possible detection host galaxy
  95. GRB 081102: RTT150 Optical observations
  96. GRB 081110: Fermi GBM detection
  97. GRB 081110: MASTER: first optical observations Fermi GRB
  98. GRB 081109: TAROT La Silla observatory optical observations
  99. GRB 081102: MASTER refind and final results
  100. GRB 081109B: Swift/UVOT refined analysis

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