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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"

19666 results found.

  1. GRB 111121A: Enhanced Swift-XRT position
  2. GRB 111121A: Swift detection of a short hard burst
  3. GRB 111117A: Gemini Afterglow Limits
  4. GRB 111117A: optical upper limit in CrAO
  5. GRB 111117A: Fermi GBM observation
  6. GRB 111117A: Swift/UVOT Upper Limits
  7. GRB 111117A: GROND observations
  8. GRB 111117A: Swift-XRT refined Analysis
  9. GRB 111117A: NOT observations
  10. GRB 111117A: Chandra ToO observation scheduled
  11. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  12. GRB 111117A: Swift detection of a short hard burst
  13. IPN Triangulation of GRB 111113A (short/hard/intense)
  14. GRB 111109A: Swift-XRT refined Analysis
  15. GRB 111109A: Swift/UVOT Photometry
  16. GRB 111109A: Swift-BAT refined analysis
  17. GRB 111109A: Enhanced Swift-XRT position
  18. GRB 111109A: Swift-XRT observations
  19. GRB 111109A: Swift detection of a burst
  20. GRB 111103B: optical upper limit of CrAO
  21. GRB 111103B: optical upper limit of Mt. Terskol observatory
  22. GRB 111107A: Fermi GBM observation
  23. Continued Skynet observations of GRB111107A
  24. GRB 111107A: Swift-XRT refined Analysis
  25. GRB 111107A: Swift/UVOT Afterglow Analysis
  26. GRB 111107A: Swift-BAT refined analysis
  27. GRB 111107A: Enhanced Swift-XRT position
  28. GRB 111107A: GROND observations
  29. Skynet observations of GRB 111107A
  30. GRB 111107A: Swift detection of a burst with an optical counterpart
  31. Konus-Wind observation of GRB 111103B
  32. GRB 111103B: Swift-XRT refined Analysis
  33. GRB 111103A: Fermi GBM observation
  34. GRB111103B Swift/UVOT Upper Limits
  35. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  36. GRB 111103B: Enhanced Swift-XRT position
  37. GRB 111103B: Swift-BAT refined analysis
  38. GRB 111103A: Swift-BAT refined analysis
  39. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  40. GRB 111022B: MASTER OT observations
  41. GRB 111103B: optical observations
  42. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  43. GRB 111103A: Swift detection of a burst
  44. Swift-BAT trigger 506884 is not a GRB
  45. GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
  46. GRB 111029A: Swift-XRT refined Analysis
  47. GRB 111029A: PAIRITEL NIR Upper Limits
  48. GRB 111026A: Swift-BAT refined analysis
  49. GRB 111029A: Swift/UVOT Upper Limits
  50. GRB 111029A: KAIT optical limits
  51. GRB 111029A: Swift-BAT refined analysis
  52. GRB 111029A: Enhanced Swift-XRT position
  53. GRB 111029A: Faulkes Telescope North observations
  54. GRB 111029A: optical upper limit
  55. GRB 111029A: ROTSE-III Optical Limits
  56. GRB 111029A: Swift detection of a burst
  57. GRB 111026A: Swift detection of a burst
  58. GRB 111022B: EVLA observations - correction to GCN 12495
  59. GRB 111022B: EVLA observations
  60. GRB111022B: D50 optical limit
  61. GRB 111022A: MITSuME Akeno Optical upper limits
  62. GRB 111022B: Swift/UVOT upper limits
  63. GRB 111022A: Swift/UVOT Upper Limits
  64. GRB 111016A: optical upper limit
  65. GRB 111022B, Swift-BAT refined analysis
  66. GRB 111022B: Swift-XRT refined Analysis
  67. GRB 111022A: Swift-XRT refined Analysis
  68. GRB 111022B: NOT observations
  69. GRB 111022B: Enhanced Swift-XRT position
  70. GRB 111022A: Swift-BAT refined analysis
  71. GRB 111022B: MASTER-Net early limit
  72. GRB 111022A: Preliminary UVOT TDRSS Non-Detection
  73. GRB 111022A: MASTER-Net early limit
  74. GRB 111022B: Swift detection of a burst
  75. GRB 111022A: Swift detection of a burst
  76. GRB 111020A: Swift-XRT refined Analysis
  77. GRB 111020A: Swift/UVOT Upper Limits
  78. GRB 111020A: Swift-BAT refined analysis
  79. GRB 111020A: Enhanced Swift-XRT position
  80. GRB 111020A: BOOTES-3 Optical Upper Limit.
  81. GRB 111020A: Swift detection of a short burst
  82. GRB 111018A: Swift/UVOT Upper Limits
  83. GRB 111018A: Swift-BAT refined analysis
  84. GRB 111018A: Swift-XRT refined Analysis
  85. GRB 111018A: GROND Upper Limits
  86. GRB 111018A: Enhanced Swift-XRT position
  87. IPN Triangulation of GRB 111016B (long duration, intense)
  88. GRB 111018A: Swift detection of a burst
  89. GRB111016A: D50 optical limit
  90. GRB 111016A: Gemini Detection of the NIR Counterpart
  91. GRB 111016A: Swift/UVOT Detection of a Source
  92. GRB 111016A: Swift-BAT refined analysis
  93. GRB 111016A: P60 Afterglow Candidate
  94. GRB 111016A: Swift-XRT refined Analysis
  95. GRB 111016A: Enhanced Swift-XRT position
  96. GRB 111016A: Swift-XRT observations
  97. GRB 111016A: Swift detection of a burst
  98. GRB 110921A: optical observations
  99. EVLA 22 GHz Detection of GRB 111008A
  100. GRB 111008A: Swift/UVOT Upper Limits

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