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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"

23721 results found.

  1. GRB 111109A: Swift-BAT refined analysis
  2. GRB 111109A: Swift-XRT observations
  3. GRB 111109A: Swift detection of a burst
  4. GRB 111103B: optical upper limit of Mt. Terskol observatory
  5. Continued Skynet observations of GRB111107A
  6. GRB 111107A: APEX submm observation
  7. GRB 111107A: Swift/UVOT Afterglow Analysis
  8. GRB 111107A: Swift-BAT refined analysis
  9. GRB 111107A: Gemini-South Redshift
  10. Skynet observations of GRB 111107A
  11. GRB 111107A: Swift detection of a burst with an optical counterpart
  12. GRB 111103B: MITSuME Akeno Optical upper limits
  13. Konus-Wind observation of GRB 111103B
  14. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  15. GRB 111103B: Swift-BAT refined analysis
  16. GRB 111103A: Swift-BAT refined analysis
  17. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  18. GRB 111022B: MASTER OT observations
  19. GRB 111103B: optical observations
  20. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  21. GRB 111103A: Swift detection of a burst
  22. Swift-BAT trigger 506884 is not a GRB
  23. GRB111029A: MITSuME Ishigakijima Optical Upper Limits
  24. GRB 111029A: Swift-XRT refined Analysis
  25. GRB 111026A: Swift-BAT refined analysis
  26. GRB 111029A: KAIT optical limits
  27. GRB 111029A: Swift-BAT refined analysis
  28. GRB 111029A: Faulkes Telescope North observations
  29. GRB 111029A: optical upper limit
  30. GRB 111029A: Swift detection of a burst
  31. GRB 111026A: Swift detection of a burst
  32. GRB111022B: D50 optical limit
  33. GRB 111022B: BTA Optical Observations
  34. GRB 111022A: MITSuME Akeno Optical upper limits
  35. GRB 111024A: MAXI/GSC detection of a burst
  36. GRB 111022B: Swift/UVOT upper limits
  37. GRB 111022A: Swift/UVOT Upper Limits
  38. GRB 111022B, Swift-BAT refined analysis
  39. GRB 111022A: RIzY Observation
  40. GRB 111022B: MITSuME Akeno Optical upper limits
  41. GRB 111022A: Swift-BAT refined analysis
  42. GRB 111022B: MASTER-Net early limit
  43. GRB 111022A: MASTER-Net early limit
  44. GRB 111022B: Swift detection of a burst
  45. GRB 111022A: Swift detection of a burst
  46. GRB 111020A: Gemini-South i-band observations
  47. GRB 111020A: Faulkes Telescope South observations
  48. GRB 111020A: Swift-BAT refined analysis
  49. GRB 111020A: Swift detection of a short burst
  50. GRB 110918A: Optical light curve for days 1.4 to 16.3
  51. GRB 111018A: Swift-BAT refined analysis
  52. Konus-Wind observation of GRB 111016B
  53. GRB 111018A: Swift-XRT refined Analysis
  54. GRB 111018A: GROND Upper Limits
  55. IPN Triangulation of GRB 111016B (long duration, intense)
  56. GRB 111018A: Swift detection of a burst
  57. GRB 111017A: Fermi GBM Detection
  58. GRB111016A: D50 optical limit
  59. GRB 111016A: Gemini Detection of the NIR Counterpart
  60. GRB 111016A: Swift-BAT refined analysis
  61. GRB 111016A: MITSuME Akeno Optical upper limits
  62. GRB 111016A: Swift-XRT observations
  63. GRB 111016A: Swift detection of a burst
  64. GRB 111008A : miniTAO/ANIR NIR observations
  65. GRB 111005A: ATCA 18 GHz decay
  66. GRB 111008A: Swift/UVOT Upper Limits
  67. Konus-Wind observation of GRB 111008A
  68. GRB 111008A: IAC80 I-band observations
  69. GRB 111008A, GROND observations
  70. GRB 111008A, Swift-BAT refined analysis,
  71. GRB 111008A: Swift detection of a burst
  72. GRB 111005A: ATCA 18 GHz detection
  73. GRB 111005A: ATCA radio upper limit
  74. GRB 111005A : miniTAO/ANIR NIR observations
  75. GRB 111005A: EVLA Observations
  76. GRB 111005A: GROND NIR observations
  77. GRB 111005A: Swift-BAT refined analysis
  78. GRB 111005A: Swift detection of a burst
  79. GRB 111003A: Fermi GBM detection
  80. GRB 110905A / MAXI J1836-194: optical monitoring
  81. GRB 110921A: MITSuME-Akeno Optical photometry
  82. Skynet/Dolomiti observations of GRB 110928A
  83. Skynet observations of GRB 110928A
  84. Trigger 504307: Swift detection of MAXI J1836-194
  85. GRB 110928A: Swift-BAT refined analysis
  86. GRB 110928A: Swift detection of a burst
  87. GRB 110924A: Swift detection of a possible burst
  88. GCN for GRB 110921B
  89. GRB110918A: Lick Observations
  90. GRB 110921A: NOT observations
  91. GRB 110921A, Swift-BAT refined analysis
  92. GRB 110918A: Liverpool Telescope optical observations
  93. GRB 110918A: submm observations from APEX
  94. GRB 110921A: optical observations in Mt. Terskol and Maidanak observatories
  95. GRB 110921A: MITSuME Akeno Optical Observation
  96. GRB 110921A: MASTER-Net early limit
  97. GRB 110921A: Swift detection of a burst
  98. GRB 110918A: Swift/UVOT Detection of the Optical Counterpart
  99. GRB 110918A optical observation
  100. GRB 110918A: Swift-XRT observations

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