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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"

15376 results found.

  1. GBM trigger 383712005 (GRB 130228A?) : Possible high-energy photon emission in Fermi/LAT data
  2. GRB 130219A: Suzaku WAM observation of the prompt emission
  3. Konus-Wind observation of GRB 130219A
  4. GRB 130216B: Suzaku WAM observation of the prompt emission
  5. GRB 130216A: possible radio counterpart is steady field source
  6. GRB 130215A: Suzaku WAM observation of the prompt emission
  7. GRB 130215A: PTF P48 optical detection
  8. GRB 130216A: Further Swift-BAT refined analysis
  9. GRB 130216A: MASTER-Net early observations
  10. GRB 130216B: Fermi GBM observation
  11. GRB 120118B: host observations and redshift determination
  12. GRB 130215A: P200 NIR observations
  13. GRB 130215A: GROND Detection of the Optical/NIR Afterglow
  14. GRB 130215A: MITSuME Okayama Optical Observation
  15. GRB 130215A: RAPTOR Measurements
  16. GRB 130215A: TAROT La Silla observatory optical observations
  17. Skynet Observations of GRB130215
  18. GRB 130211A: GROND detection of the afterglow
  19. GRB 130206A: Fermi LAT Observations
  20. GRB 130206A: Fermi GBM observation
  21. GRB 130131A: optical observation in Mondy observatory
  22. GRB 130131A - UKIRT confirmation of afterglow
  23. GRB 130131B: VLT/X-shooter acquisition camera limits
  24. GRB 130131B: GROND Upper limits
  25. GRB 130131B: IAC80 I-band observations
  26. Swift/BAT trigger 547142 is new source Swift J1753.7-2544
  27. GRB 130127A: Fermi GBM detection
  28. GRB 130122A: RTT150 optical observations
  29. GRB 130122A: Swift/UVOT Detection
  30. GRB 130122A: T100 observations
  31. Short GRB 121226A: TNG observation of the host galaxy
  32. GRB 121225B: Suzaku WAM observation of the prompt emission
  33. Konus-Wind observation of GRB 130102B
  34. GRB 130102A: MASTER-Net optical observations
  35. GRB 121229A: GROND detection of the afterglow
  36. GRB 121226A, Swift-BAT refined analysis
  37. Konus-Wind observation of GRB 121225B
  38. GRB 121225B: Fermi LAT Detection
  39. GRB 121217A: Fermi GBM observation
  40. GRB 121217A: GROND Detection of the Afterglow
  41. GRB121212A: NOT optical imaging
  42. GRB 121211A: Fermi GBM observation
  43. GRB 121212A: PAIRITEL NIR Observations
  44. GRB 121212A: A long GRB detected by INTEGRAL
  45. GRB 121211A: Swift/UVOT Detection
  46. GRB 121211A: MITSuME Okayama Optical Observation
  47. GRB 121211A - Faulkes Telescope North afterglow confirmation
  48. GRB 121209A: Keck observations
  49. GRB 121209A: Gemini-South imaging
  50. GRB 121209A: PAIRITEL NIR Observations
  51. GRB 121127A: Suzaku WAM observation of the prompt emission
  52. GRB 121122A: Suzaku WAM observation of the prompt emission
  53. GRB 121202A: Fermi GBM observation
  54. GRB 121128A: MITSuME Akeno Optical upper limits
  55. Konus-Wind observation of GRB 121127A
  56. GRB 121128A: Swift/UVOT Detection
  57. Konus-Wind observation of GRB 121128A
  58. GRB 121128A: FTN optical afterglow confirmation
  59. GRB 121123A: Suzaku WAM observation of the prompt emission
  60. Konus-Wind observation of GRB 121122A
  61. GRB 121117A: Terskol obseravtions
  62. GRB 121123A: Swift/UVOT Observations
  63. GRB 121118B: Suzaku WAM observation of the prompt emission
  64. GRB 121125A: Fermi GBM Observation
  65. GRB 121125A: LOAO Observation
  66. GRB 121123A: BOOTES-4 and IAC80 optical observations
  67. GRB 121123A: NOT optical observations
  68. GRB 121123A: Fermi GBM observation
  69. Konus-Wind observation of GRB 121118B
  70. GRB 121117A: Swift detection of a burst
  71. GRB 121108A : Lulin/TRIPOL2 Optical Limits
  72. GRB 121031A: Fermi GBM detection
  73. GRB 121028A: Swift/UVOT Upper Limits
  74. GRB 121102A: Swift/UVOT Upper Limits
  75. GRB 121029A Suzaku WAM observation of the prompt emission
  76. GRB 121102A : a long GRB detected by INTEGRAL
  77. GRB 121027A: GROND Confirmation of Rebrightening
  78. GRB 121029A: Fermi GBM detection
  79. GRB 121027A: Swift-XRT refined Analysis
  80. GRB 121027A: Brightening IR counterpart
  81. GRB 121024A: optical observations
  82. GRB 121024A: MITSuME Ishigakijima upper limits
  83. GRB 121024A: MITSuME Okayama Optical upper limits
  84. GRB 121024A: PAIRITEL NIR Detection
  85. GRB 121024A: GROND Detection of the Optical/NIR Afterglow
  86. Skynet PROMPT/Dolomiti observations of GRB121024A
  87. GRB 121017A: GROND Observations
  88. GRB 121011B: Suzaku WAM observation of the prompt emission
  89. GRB 121011A Suzaku WAM observation of the prompt emission
  90. GRB 121012A: Fermi GBM detection
  91. Konus-Wind observation of GRB 121011B
  92. GRB 121011A: Fermi GBM observation
  93. GRB 121011A: Fermi-LAT detection of a burst
  94. GRB121011A : Xinglong TNT optical observation
  95. GRB 121011A: MITSuME Okayama Optical Observation
  96. GRB 121001A: GROND Afterglow Confirmation
  97. Swift Trigger 535026 is GRB 121001A: Swift-BAT refined analysis
  98. Swift Trigger 535026: Optical decay confirmation with IAC80 and BOOTES-2/TELMA.
  99. GRB 121001A: MASTER optical observations
  100. Swift Trigger 535026: Galactic Transient or possible GRB

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