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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"

19663 results found.

  1. GRB 110319A: Swift-BAT refined analysis
  2. GRB 110319A: Swift-XRT refined Analysis
  3. GRB 110318B: GROND upper limits
  4. GRB 110319A: Enhanced Swift-XRT position
  5. GRB 110319A: Swift detection of a burst
  6. GRB 110318B: Swift-XRT refined Analysis
  7. GRB 110318A: Fermi GBM detection
  8. GRB 110318B: Swift-BAT refined analysis
  9. GRB 110318B: Enhanced Swift-XRT position
  10. GRB 110318A: Swift-BAT refined analysis
  11. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  12. GRB 110318B: Swift detection of a burst
  13. GRB 110318A: Swift detection of a burst
  14. GRB 110315A: Swift/UVOT Upper Limits
  15. GRB 110315A: Swift-XRT refined Analysis
  16. GRB 110315A: Swift-BAT refined analysis
  17. GRB 110315A: Enhanced Swift-XRT position
  18. GRB 110315A: MASTER early optical observations
  19. GRB 110315A: Swift detection of a burst
  20. GRB 110312A: Swift/UVOT Upper Limits
  21. GRB 110312A: Swift-XRT refined Analysis
  22. GRB 110312A: GROND Upper Limits
  23. GRB 110312A: Enhanced Swift-XRT position
  24. GRB 110312A: Swift-BAT refined analysis
  25. GRB 110312A: Swift detection of a burst
  26. GRB 110305A: Swift/UVOT Upper Limits
  27. GRB 110305A: Swift-XRT refined Analysis
  28. GRB 110305A: Enhanced Swift-XRT position
  29. GRB 110305A: Swift-BAT refined analysis
  30. GRB 110305A: GROND Detection of Optical Afterglow
  31. GRB 110305A: Swift detection of a burst
  32. GRB 110223A: optical upper limits
  33. Swift/UVOT observations of GRB110223A
  34. No IPN GRB detected in conjunction with candidate GRB 110215
  35. GRB GRB 110223A: MASTER VWF early optical observations
  36. Swift/UVOT observations of GRB110223b
  37. GRB 110223A: Swift-BAT refined analysis
  38. GRB 110223A: Swift-XRT refined Analysis
  39. GRB 110223B: Swift-XRT refined Analysis
  40. GRB 110223A: Enhanced Swift-XRT position
  41. GRB 110223B: Enhanced Swift-XRT position
  42. GRB 110223B: Swift-BAT refined analysis
  43. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  44. GRB 110223B: Swift detection of a burst
  45. GRB 110223A: Swift detection of a burst
  46. GRB 110213B: Swift/UVOT observations
  47. GRB110213B: X-ray afterglow confirmation
  48. Fermi GBM detection of an SGR-like burst
  49. Swift XRT and UVOT Observations of OT 110215
  50. GRB 110213A: optical observations in CrAO
  51. GRB 110213A: optical observations in Mondy
  52. Swift/UVOT observations of GRB110210a.
  53. GRB 110210A: optical upper limit
  54. GRB 110210A: ROVOR Upper Limit
  55. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  56. GRB 110212A: Swift XRT and UVOT observations
  57. Swift GRB110213A: interesting behaviour
  58. GRB 110213A: Fermi GBM observation
  59. GRB 110205A: Konkoly optical observations
  60. GRB 110213B: Swift XRT observation
  61. Konus-Wind observation of GRB 110213A
  62. GRB 110213A: Swift-XRT refined Analysis
  63. GRB 110213A: Swift/UVOT refined analysis
  64. GRB 110213A: Lightbuckets Optical Observations
  65. GRB 110213A, Swift-BAT refined analysis
  66. GRB 110213A: optical observations
  67. GRB 110213A: Enhanced Swift-XRT position
  68. GRB 110213A: Bok Telescope Redshift
  69. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  70. GRB 110213A: Swift detection of a burst with optical afterglow
  71. GRB 110212A: GRT Optical Observation
  72. GRB 110212A, Swift-BAT refined analysis
  73. GRB 110212A: ROTSE-III Optical Limits
  74. GRB 110212A: Swift detection of a burst
  75. GRB 110207A: Suzaku WAM observation of the prompt emission
  76. GRB 110210A: Swift-XRT refined Analysis
  77. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  78. GRB 110210A: Swift-BAT refined analysis
  79. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  80. GRB 110210A: Enhanced Swift-XRT position
  81. GRB 110201A: optical observations
  82. GRB 110210A: Swift detection of a burst
  83. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  84. Fermi GBM detection of a burst from 1E 1841-045
  85. Swift/UVOT observations of GRB110208a
  86. GRB 110205A: Suzaku WAM observation of the prompt emission
  87. GRB 110207A: Swift-XRT observations
  88. GRB 110208A: Swift-XRT refined Analysis
  89. GRB 110208A: Enhanced Swift-XRT position
  90. GRB 110208A: Swift-BAT refined analysis
  91. GRB 110208A: Swift detection of a burst
  92. SGR-like outburst from the magnetar 1E 1841-04.5
  93. GRB 110205A: optical observations in Mondy observatory
  94. GRB 110207A: Fermi GBM observation
  95. GRB 110205A : HCT optical observations
  96. GRB 110207A: TAROT Calern observatory optical observations
  97. GRB 110207A: Swift-BAT refined analysis
  98. GRB 110206A: UVOT detection of afterglow candidate
  99. GRB 110207A: MASTER prompt and early optical observations
  100. Konus-Wind observation of GRB 110205A

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