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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"

32722 results found.

  1. GRB 081226: Second epoch of Gemini-South imaging
  2. GRB 081226A: Swift-BAT refined analysis
  3. GRB 081226: Gemini-South imaging
  4. GRB 081226: GROND afterglow candidate
  5. GRB 081226: ROTSE-III Optical Limits
  6. GRB 080810: optical observations
  7. GRB 081211B: optical observations
  8. GRB081224: LAT retraction
  9. GRB 081224: Swift-XRT observation
  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: Gemini-N confirmation of redshift z=2.77
  15. GRB 081222:Optical afterglow observation
  16. VLA radio upper limit on GRB 081222
  17. GRB 081222: Fermi GBM observation
  18. GRB 081222: Gemini-South absorption redshift
  19. GRB081222: Swift/UVOT further observations
  20. GRB 081221: Probable host galaxy in Keck imaging
  21. GRB 081222, Swift-BAT refined analysis
  22. GRB 081221, Swift-BAT refined analysis
  23. Konus-Wind observation of very bright GRB 081215A
  24. GRB 081222: Swift XRT refined analysis
  25. GRB081221: Fermi GBM observation
  26. Swift/UVOT observations of GRB 081221
  27. IPN triangulation of bright GRB 081215A
  28. GRB 081221: Swift-XRT Refined Analysis
  29. GRB 081221: pseudo-redshift (pz=0.7) from the spectral parameters of the prompt emission
  30. GRB 081222: Faulkes Telescope South observations
  31. GRB 081221: Gemini-N nIR imaging
  32. GRB081222, optical observation
  33. GRB081222: Swift/UVOT detection of an optical afterglow
  34. GRB081203A: BTA observation
  35. Konus-Wind observation of GRB 081221
  36. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  37. GRB 081221: further NOT observations
  38. GRB 081221: NOT observations
  39. GRB 081211B: Further Swift-XRT analysis
  40. GRB 081216: Suzaku WAM observation of the prompt emission
  41. GRB 081216 : Fermi GBM observation
  42. GRB 081215A: Fermi GBM detection
  43. GRB 081211B - possibly a short burst with extended emission
  44. GRB 081118: Zadko observations
  45. Fermi Trig Num 251059717 = SGR 0044+42: MASTER prompt optical observations
  46. GRB 081215A: Gamma Repeater?
  47. Possible GRB 081211B: Swift/UVOT Upper Limits
  48. GRB 081210: optical observations
  49. Possible GRB 081211B - Swift-XRT analysis
  50. GRB 081209: Fermi GBM detection
  51. GRB 081007: Detection of a Supernova
  52. GRB 081210: Xinglong TNT R band Upper Limits
  53. GRB 081210, SMARTS optical/IR observations
  54. GRB 081211: Swift-BAT refined analysis
  55. GRB 081211: Swift XRT refined analysis
  56. GRB 081211: Swift/UVOT detection of an optical afterglow
  57. GRB 081210: Swift/UVOT refined analysis
  58. GRB 081210: Swift-XRT refined analysis
  59. GRB081203B: optical observations
  60. GRB 081210: Swift-BAT refined analysis
  61. Konus-Wind observation of GRB 081209
  62. GRB 081203A: optical observations
  63. Radio observation of GRB 081121 with ATCA
  64. Radio observation of GRB 081118 with ATCA
  65. GRB 081128: afterglow observations
  66. GRB 081203B: Suzaku WAM observation of the prompt emission
  67. GRB 081203B: Additional Gemini imaging
  68. Radio observation of GRB 081109 with ATCA
  69. Radio observation of GRB 081104 with ATCA
  70. Radio observation of GRB 081029 with ATCA
  71. Radio observation of GRB 081008 with ATCA
  72. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  73. GRB 081203B: Gemini observations
  74. GRB 081128: optical observation in CrAO
  75. GRB081203A: Optical observations at Ishigaki
  76. GRB 081128: Optical afterglow observations
  77. GRB 081204: GROND Observations
  78. GRB081203B: optical observations
  79. Radio detection of GRB 081203B with the VLA
  80. GRB 081204: Magellan observations
  81. GRB081203A: Radio upper limit at 15 GHz
  82. GRB 081204: Swift/UVOT Upper Limits
  83. GRB 081204: Swift XRT afterglow confirmation
  84. GRB081203A: MITSuME optical observation
  85. GRB 081203A: Optical observations of Xinglong TNT telescope
  86. GRB 081203A: Skynet/GORT Detections
  87. GRB 081204: Swift XRT afterglow candidate
  88. GRB081203A: optical observation
  89. GRB 081204 : a long GRB localized by INTEGRAL
  90. VLA Radio upper limit on GRB 081203A
  91. Swift-XRT observations of GRB 081203B
  92. Konus-Wind observation of GRB 081203A
  93. Konus-Wind observation of GRB 081203B
  94. GRB081203A: Swift-XRT refined analysis
  95. GRB 081203B: optical observations
  96. Swift/UVOT detection of GRB081203B
  97. GRB 081203B: Swift-XRT candidate afterglow.
  98. GRB 081203A: optical observations
  99. Swift UVOT observations of GRB 081203A
  100. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data

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