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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"

19611 results found.

  1. GRB 110210A: optical upper limit
  2. GRB 110210A: ROVOR Upper Limit
  3. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  4. GRB 110212A: Swift XRT and UVOT observations
  5. Swift GRB110213A: interesting behaviour
  6. GRB 110213A: Fermi GBM observation
  7. GRB 110205A: Konkoly optical observations
  8. GRB 110213B: Swift XRT observation
  9. Konus-Wind observation of GRB 110213A
  10. GRB 110213A: Swift-XRT refined Analysis
  11. GRB 110213A: Swift/UVOT refined analysis
  12. GRB 110213A: Lightbuckets Optical Observations
  13. GRB 110213A, Swift-BAT refined analysis
  14. GRB 110213A: optical observations
  15. GRB 110213A: Enhanced Swift-XRT position
  16. GRB 110213A: Bok Telescope Redshift
  17. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  18. GRB 110213A: Swift detection of a burst with optical afterglow
  19. GRB 110212A: GRT Optical Observation
  20. GRB 110212A, Swift-BAT refined analysis
  21. GRB 110212A: ROTSE-III Optical Limits
  22. GRB 110212A: Swift detection of a burst
  23. GRB 110207A: Suzaku WAM observation of the prompt emission
  24. GRB 110210A: Swift-XRT refined Analysis
  25. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  26. GRB 110210A: Swift-BAT refined analysis
  27. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  28. GRB 110210A: Enhanced Swift-XRT position
  29. GRB 110201A: optical observations
  30. GRB 110210A: Swift detection of a burst
  31. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  32. Fermi GBM detection of a burst from 1E 1841-045
  33. Swift/UVOT observations of GRB110208a
  34. GRB 110205A: Suzaku WAM observation of the prompt emission
  35. GRB 110207A: Swift-XRT observations
  36. GRB 110208A: Swift-XRT refined Analysis
  37. GRB 110208A: Enhanced Swift-XRT position
  38. GRB 110208A: Swift-BAT refined analysis
  39. GRB 110208A: Swift detection of a burst
  40. SGR-like outburst from the magnetar 1E 1841-04.5
  41. GRB 110205A: optical observations in Mondy observatory
  42. GRB 110207A: Fermi GBM observation
  43. GRB 110205A : HCT optical observations
  44. GRB 110207A: TAROT Calern observatory optical observations
  45. GRB 110207A: Swift-BAT refined analysis
  46. GRB 110206A: UVOT detection of afterglow candidate
  47. GRB 110207A: MASTER prompt and early optical observations
  48. Konus-Wind observation of GRB 110205A
  49. GRB 110207A: Swift detection of a burst
  50. GRB 110206A: Swift detection of a probable X-ray afterglow
  51. GRB 110205A: Lightbuckets Optical Observations
  52. GRB 110205A: Swift/UVOT Continuing Observations
  53. Observations GRB 110205A
  54. GRB 110205A: Swift-BAT refined analysis
  55. GRB 110205A: Newcastle Observatory Optical Observations
  56. GRB 110205A: Swift-XRT refined Analysis
  57. GRB 110205A: optical flare confirmation
  58. GRB 110205A: Enhanced Swift-XRT position
  59. GRB 110205A: PAIRITEL NIR Afterglow Detection
  60. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  61. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  62. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  63. GRB 110205A: TAROT Calern observatory optical detection
  64. GRB 110205A: Swift detection of a burst with an optical candidate
  65. GRB 110128A: Fermi GBM detection
  66. GRB 110201A: Swift-XRT refined Analysis
  67. Swift/UVOT observations of GRB110201A
  68. GRB 110201A: Swift-BAT refined analysis
  69. GRB 110201A: MASTER optical observations
  70. GRB 110201A: Swift detection of a burst
  71. GRB 110128A, Swift-BAT refined analysis
  72. GRB 110128A: Swift/UVOT observations
  73. GRB 110128A: Swift-XRT refined Analysis
  74. GRB 110128A: Enhanced Swift-XRT position
  75. GRB 110128A: TAROT Calern observatory upper limits
  76. GRB 110128A: Swift detection of a burst
  77. GRB 110106B, radio observations
  78. IPN triangulation of GRB 110120A
  79. GRB 110106A: CrAO optical observations
  80. GRB 110119A: Fermi GBM detection
  81. GRB 110119A: Suzaku WAM observation of the prompt emission
  82. GRB 110112A: optical upper limit
  83. GRB110119: Swift/UVOT Detection
  84. GRB 110119A: Swift-XRT refined Analysis
  85. GRB 110119A: Swift-BAT refined analysis
  86. GRB 110119A: PAIRITEL NIR Afterglow Detection
  87. GRB 110119A: Enhanced Swift-XRT position
  88. GRB 110119A: Swift detection of a burst with an optical detection
  89. GRB 101219B: GROND detection of a SN signature
  90. Swift-BAT trigger 442771 is a noise fluctuation
  91. GRB 101219B: correction
  92. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  93. New feature in Fermi GBM GRB Ground Position Notices
  94. Swift-BAT Trigger 442539 is not a GRB
  95. Swift Trigger 442539 is probably not a GRB
  96. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  97. GRB 110107A: Swift-XRT afterglow confirmation
  98. GRB 110112A: Swift-XRT refined Analysis
  99. GRB 110112A: Swift/UVOT upper limits
  100. GRB 110112A: MASTER optical observations

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