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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"

23730 results found.

  1. GRB 111117A: GROND observations
  2. GRB111117A: Magellan IMACS observations
  3. GRB 111117A: NOT observations
  4. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  5. GRB 111117A: GMG upper limit
  6. GRB 111117A: Swift detection of a short hard burst
  7. Konus-Wind observation of GRB 111113A
  8. XRF 111111A/MAXI J0158-744: MAXI GSC refined analysis
  9. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  10. GRB 111109A: Swift-BAT refined analysis
  11. GRB 111109A: Swift-XRT observations
  12. GRB 111109A: Swift detection of a burst
  13. GRB 111103B: optical upper limit of Mt. Terskol observatory
  14. Continued Skynet observations of GRB111107A
  15. GRB 111107A: APEX submm observation
  16. GRB 111107A: Swift/UVOT Afterglow Analysis
  17. GRB 111107A: Swift-BAT refined analysis
  18. GRB 111107A: Gemini-South Redshift
  19. Skynet observations of GRB 111107A
  20. GRB 111107A: Swift detection of a burst with an optical counterpart
  21. GRB 111103B: MITSuME Akeno Optical upper limits
  22. Konus-Wind observation of GRB 111103B
  23. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  24. GRB 111103B: Swift-BAT refined analysis
  25. GRB 111103A: Swift-BAT refined analysis
  26. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  27. GRB 111022B: MASTER OT observations
  28. GRB 111103B: optical observations
  29. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  30. GRB 111103A: Swift detection of a burst
  31. Swift-BAT trigger 506884 is not a GRB
  32. GRB111029A: MITSuME Ishigakijima Optical Upper Limits
  33. GRB 111029A: Swift-XRT refined Analysis
  34. GRB 111026A: Swift-BAT refined analysis
  35. GRB 111029A: KAIT optical limits
  36. GRB 111029A: Swift-BAT refined analysis
  37. GRB 111029A: Faulkes Telescope North observations
  38. GRB 111029A: optical upper limit
  39. GRB 111029A: Swift detection of a burst
  40. GRB 111026A: Swift detection of a burst
  41. GRB111022B: D50 optical limit
  42. GRB 111022B: BTA Optical Observations
  43. GRB 111022A: MITSuME Akeno Optical upper limits
  44. GRB 111024A: MAXI/GSC detection of a burst
  45. GRB 111022B: Swift/UVOT upper limits
  46. GRB 111022A: Swift/UVOT Upper Limits
  47. GRB 111022B, Swift-BAT refined analysis
  48. GRB 111022A: RIzY Observation
  49. GRB 111022B: MITSuME Akeno Optical upper limits
  50. GRB 111022A: Swift-BAT refined analysis
  51. GRB 111022B: MASTER-Net early limit
  52. GRB 111022A: MASTER-Net early limit
  53. GRB 111022B: Swift detection of a burst
  54. GRB 111022A: Swift detection of a burst
  55. GRB 111020A: Gemini-South i-band observations
  56. GRB 111020A: Faulkes Telescope South observations
  57. GRB 111020A: Swift-BAT refined analysis
  58. GRB 111020A: Swift detection of a short burst
  59. GRB 110918A: Optical light curve for days 1.4 to 16.3
  60. GRB 111018A: Swift-BAT refined analysis
  61. Konus-Wind observation of GRB 111016B
  62. GRB 111018A: Swift-XRT refined Analysis
  63. GRB 111018A: GROND Upper Limits
  64. IPN Triangulation of GRB 111016B (long duration, intense)
  65. GRB 111018A: Swift detection of a burst
  66. GRB 111017A: Fermi GBM Detection
  67. GRB111016A: D50 optical limit
  68. GRB 111016A: Gemini Detection of the NIR Counterpart
  69. GRB 111016A: Swift-BAT refined analysis
  70. GRB 111016A: MITSuME Akeno Optical upper limits
  71. GRB 111016A: Swift-XRT observations
  72. GRB 111016A: Swift detection of a burst
  73. GRB 111008A : miniTAO/ANIR NIR observations
  74. GRB 111005A: ATCA 18 GHz decay
  75. GRB 111008A: Swift/UVOT Upper Limits
  76. Konus-Wind observation of GRB 111008A
  77. GRB 111008A: IAC80 I-band observations
  78. GRB 111008A, GROND observations
  79. GRB 111008A, Swift-BAT refined analysis,
  80. GRB 111008A: Swift detection of a burst
  81. GRB 111005A: ATCA 18 GHz detection
  82. GRB 111005A: ATCA radio upper limit
  83. GRB 111005A : miniTAO/ANIR NIR observations
  84. GRB 111005A: EVLA Observations
  85. GRB 111005A: GROND NIR observations
  86. GRB 111005A: Swift-BAT refined analysis
  87. GRB 111005A: Swift detection of a burst
  88. GRB 111003A: Fermi GBM detection
  89. GRB 110905A / MAXI J1836-194: optical monitoring
  90. GRB 110921A: MITSuME-Akeno Optical photometry
  91. Skynet/Dolomiti observations of GRB 110928A
  92. Skynet observations of GRB 110928A
  93. Trigger 504307: Swift detection of MAXI J1836-194
  94. GRB 110928A: Swift-BAT refined analysis
  95. GRB 110928A: Swift detection of a burst
  96. GRB 110924A: Swift detection of a possible burst
  97. GCN for GRB 110921B
  98. GRB110918A: Lick Observations
  99. GRB 110921A: NOT observations
  100. GRB 110921A, Swift-BAT refined analysis

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