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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"

27617 results found.

  1. GRB 110402A: Liverpool Telescope Observations
  2. GRB 110402A: Swift detection of a burst
  3. GRB 110328A / Swift J164449.3+573451: Mondy optical observations
  4. GRB 110328A / Swift J164449.3+573451
  5. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  6. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  7. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  8. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  9. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  10. GRB 110328A / Swift J164449.3+573451: optical observations
  11. GRB 110328B: Fermi-LAT Detection
  12. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  13. GRB 110328B: Fermi GBM detection
  14. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  15. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  16. GRB / X-ray transient 110328A: Gemini optical observations
  17. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  18. GRB 110328A: Swift detection of a burst
  19. Fermi Gamma-ray Burst Monitor trigger 322686470 (110324797) is not a GRB
  20. GRB 110319B BAT refined analysis
  21. GRB 110319B: Swift/UVOT Upper Limits
  22. GRB 110318B: Swift/UVOT Upper Limits
  23. GRB 110319B: GROND upper limits
  24. GRB 110319B: Swift-XRT afterglow candidate.
  25. GRB 110319B found in ground analysis of Swift-BAT data
  26. GRB 110319A: Swift/UVOT Detection
  27. GRB 110319A: Swift-BAT refined analysis
  28. GRB 110319A: Swift-XRT refined Analysis
  29. GRB 110318B: GROND upper limits
  30. GRB 110319A: Swift detection of a burst
  31. GRB 110318B: Swift-XRT refined Analysis
  32. GRB 110318A: Fermi GBM detection
  33. GRB 110318B: Swift-BAT refined analysis
  34. GRB 110318A: Swift-BAT refined analysis
  35. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  36. GRB 110318B: Swift detection of a burst
  37. GRB 110318A: Swift detection of a burst
  38. Fermi GBM trigger 321944155 (110316205) is not a GRB
  39. GRB 110315A: Swift/UVOT Upper Limits
  40. GRB 110315A: Swift-XRT refined Analysis
  41. GRB 110315A: Swift-BAT refined analysis
  42. GRB 110315A: MASTER early optical observations
  43. GRB 110315A: Swift detection of a burst
  44. GRB 110312A: Swift/UVOT Upper Limits
  45. GRB 110312A: Swift-XRT refined Analysis
  46. GRB 110312A: GROND Upper Limits
  47. GRB 110312A: Swift-BAT refined analysis
  48. GRB 110312A: Swift detection of a burst
  49. GRB 110305A: REM detection of a possible NIR afterglow
  50. GRB 110305A: Swift/UVOT Upper Limits
  51. GRB 110305A: Swift-XRT refined Analysis
  52. GRB 110305A: Swift-BAT refined analysis
  53. IBAS trigger n. 6138 is not a GRB
  54. GRB 110305A: GROND Detection of Optical Afterglow
  55. GRB 110305A: Swift detection of a burst
  56. GRB 110301A: Fermi GBM detection
  57. Swift/UVOT observations of GRB110223A
  58. No IPN GRB detected in conjunction with candidate GRB 110215
  59. GRB GRB 110223A: MASTER VWF early optical observations
  60. Swift/UVOT observations of GRB110223b
  61. GRB 110223A: Swift-BAT refined analysis
  62. GRB 110223A : early optical limit by "Pi of the Sky"
  63. GRB 110223A: Liverpool Telescope observations
  64. GRB 110223A: Swift-XRT refined Analysis
  65. GRB 110223B: Swift-XRT refined Analysis
  66. GRB 110223B: Swift-BAT refined analysis
  67. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  68. GRB 110223B: Swift detection of a burst
  69. GRB 110223A: Swift detection of a burst
  70. GRB 110213B: Swift/UVOT observations
  71. Fermi GBM detection of an SGR-like burst
  72. Swift XRT and UVOT Observations of OT 110215
  73. GRB 110213B: GROND observations of the optical/NIR afterglow
  74. Fermi GBM trigger 319534757 (110216319) is not a GRB
  75. Swift/UVOT observations of GRB110210a.
  76. GRB 110210A: ROVOR Upper Limit
  77. GRB 110213A: YNAO-GMG Observations
  78. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  79. GRB 110212A: Swift XRT and UVOT observations
  80. GRB 110213A: Fermi GBM observation
  81. GRB 110205A: Konkoly optical observations
  82. Konus-Wind observation of GRB 110213A
  83. GRB 110213A: Swift-XRT refined Analysis
  84. GRB 110213A: Swift/UVOT refined analysis
  85. GRB 110213A: Lightbuckets Optical Observations
  86. GRB 110213A, Swift-BAT refined analysis
  87. GRB110212A: MITSuME Okayama optical upper limits
  88. GRB 110213A: KAIT observations
  89. GRB 110213A: Bok Telescope Redshift
  90. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  91. GRB 110213A: P60 Optical Afterglow Detection
  92. GRB 110213A: Swift detection of a burst with optical afterglow
  93. GRB 110212A: GRT Optical Observation
  94. GRB 110212A, Swift-BAT refined analysis
  95. GRB 110212A: SARA-N Optical Limits
  96. GRB110212A: BOOTES-2/TELMA optical limits
  97. GRB 110212A: ROTSE-III Optical Limits
  98. GRB 110212A: Swift detection of a burst
  99. GRB 110207A: Suzaku WAM observation of the prompt emission
  100. GRB 110210A: Swift-XRT refined Analysis

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