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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"

19670 results found.

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

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