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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 140206B: Fermi-LAT detection
  2. GRB 140206A: Swift/UVOT optical detection
  3. GRB140206A: a long GRB detected by INTEGRAL
  4. GRB 140206A: Swift detection of a burst
  5. GRB 140129A: 5 GHz VLA observations
  6. GRB 140129A: Khureltogot optical limit
  7. GRB 140129B: Swift/UVOT Detection
  8. GRB 140129A: Continued RATIR Optical and NIR Observations
  9. GRB 140129B: Swift-XRT refined Analysis
  10. GRB 140129B: MASTER OT early light curve
  11. GRB 140129B, Swift-BAT refined analysis (probably not a short burst)
  12. GRB140129A: RAPTOR Observations of the Early Afterglow
  13. GRB 140129B: Enhanced Swift-XRT position
  14. GRB 140129A, Swift-BAT refined analysis
  15. GRB 140129A: Swift/UVOT Observations
  16. GRB 140129A: Swift-XRT refined Analysis
  17. GRB 140129B: MASTER OT confirmation
  18. GRB 140129B: Swift detection of a burst with an optical afterglow
  19. GRB 140129A: Enhanced Swift-XRT position
  20. GRB 140129A: ROTSE-III Detection of Optical Counterpart
  21. GRB 140129A: RATIR Optical and NIR Observations
  22. GRB 140129A: P60 optical afterglow detection
  23. GRB 140129A: Swift detection of a burst with an optical afterglow
  24. GRB 140110A: Second Follow-up Swift-XRT Observation
  25. GRB 140114A: optical upper limit
  26. Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
  27. GRB 140118A/MAXI J1421-613: Skynet PROMPT/R-COP observations
  28. GRB 140118A: RATIR Optical and NIR Observations
  29. GRB 140118A: Fermi GBM observation
  30. GRB 140118A, Swift-BAT refined analysis
  31. Swift Trigger 584155 is MAXI J1421-613
  32. GRB 140118A: Swift detection of a burst
  33. GRB 140110A: Further Swift-XRT Observation
  34. GRB 140103A: MASTER-Net early OT detection
  35. GRB 140103A: optical upper limit
  36. GRB 140108A: Mondy optical observations, refined analysis
  37. GRB 140114A: ROTSE-III Optical Limits
  38. GRB 140114A: Swift-XRT refined Analysis
  39. GRB 140114A: Swift-BAT refined analysis
  40. GRB 140114A: Swift/UVOT Upper Limits
  41. GRB 140114A: KAIT Optical Upper Limit
  42. GRB 140103A: AAO optical afterglow candidate
  43. GRB 140104B: Further Swift XRT observations
  44. GRB 140114A: Enhanced Swift-XRT position
  45. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  46. GRB 140114A: P60 Observations
  47. GRB 140114A: Swift detection of a burst
  48. GRB 140110A: Swift/UVOT retraction of UVOT candidates
  49. IPN Triangulation of GRB 140110A
  50. GRB 140110A: Swift/UVOT Observations
  51. GRB 140108A: Suzaku WAM observation of the prompt emission
  52. GRB 140110A: Swift XRT observations
  53. GRB 140110A: Reported UVOT OT not GRB afterglow
  54. GRB 140110A: OT detection in Swift/UVOT imaging
  55. GRB 140108A BAT refined analysis update *CORRECTION*
  56. GRB 140108A BAT refined analysis update
  57. GRB 140110A Tiled Swift observations
  58. GRB 140110A: Fermi-LAT detection of a burst
  59. GRB 140108A: Mondy optical upper limit
  60. GRB 140108A: Swift-BAT refined analysis
  61. GRB 140108A: Fermi GBM detection
  62. GRB 140108A: Swift/UVOT Detection
  63. GRB 140108A: theoretical prediction of redshift and of supernova occurrence
  64. GRB 140108A: Swift-XRT refined Analysis
  65. GRB 140108A: Enhanced Swift-XRT position
  66. GRB 140108A: Mondy optical observations
  67. GRB 140108A: D50+BART optical candidate detection
  68. GRB 140108A: MASTER-Net OT detection
  69. GRB 140108A: Prompt enhanced Swift-XRT position
  70. GRB 140108A: Swift detection of a burst
  71. New Fermi-LAT GRB Table
  72. Swift-BAT triggered on KS 1947+300
  73. GRB 140105A: Swift XRT observations
  74. GRB 140103A: Swift XRT afterglow confirmation
  75. GRB 140104B: Swift XRT observations
  76. GRB 140102A: Swift/UVOT Detection
  77. GRB 140102A: BOOTES-4 early optical observations
  78. GRB 140104B: Fermi-LAT detection of a burst
  79. GRB 131209A: Further Swift XRT observations
  80. Swift-BAT trigger 582894 is HR 1099 (Flare star)
  81. GRB 140102A, Optical Observations
  82. GRB 140103A: P60 Observations
  83. GRB 140102A: P60 observations
  84. GRB 131231A: Swift/UVOT Observations of the Optical Afterglow
  85. GRB 140103A: Swift/UVOT Upper Limits
  86. GRB 140102A: Fermi/GBM Observation
  87. GRB 131229A: Suzaku WAM observation of the prompt emission
  88. Konus-Wind observation of GRB 140102A
  89. GRB 140103A: Swift-XRT refined analysis
  90. GRB 140103A, Swift-BAT refined analysis
  91. GRB 140102A: MAXI/GSC detection
  92. GRB 140102A, Swift-BAT refined analysis
  93. GRB 140102A: Swift-XRT refined Analysis
  94. GRB 140103A: MASTER-Net optical observations
  95. GRB 140102A: Fermi-LAT detection of a burst
  96. GRB 140102A: Enhanced Swift-XRT position
  97. GRB 140103A: Swift detection of a burst
  98. GRB 131224B detected in ground analysis of Swift-BAT data
  99. GRB 140102A: Swift detection of a burst with optical counterpart
  100. GRB 131229A: Fermi GBM detection

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