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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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"

19595 results found.

  1. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  2. GRB 140213A: Swift-XRT observations
  3. GRB 140213A: Swift/UVOT Detection
  4. GRB 140213A: Swift detection of a burst
  5. Trigger 586482: Swift detection of GROJ1744-28
  6. Correction to GCN 18521 "GRB140209A: Swift/UVOT observations"
  7. GRB140209A: Swift/UVOT observations.
  8. GRB 140211A: Swift-BAT refined analysis
  9. GRB 140209A: Swift-XRT observations
  10. Konus-Wind observation of GRB 140209A
  11. GRB 140211A: Swift detection of a burst
  12. GRB 140209A: Early RAPTOR Optical Detection
  13. GRB 140209A: Swift-BAT Spectral lag analysis
  14. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  15. GRB 140209A, Swift-BAT refined analysis
  16. GRB 140209A: Fermi GBM observation
  17. GRB 140209A: optical observations
  18. GRB 140209A: P60 optical afterglow detection
  19. GRB 140209A: Swift detection of a burst
  20. GRB 140206A: Mondy optical observations
  21. GRB 140206A: Liverpool Telescope optical afterglow observations
  22. GRB 140206A, Swift-BAT refined analysis
  23. GRB 140206A: Swift-XRT refined Analysis
  24. GRB 140206A: T100 observations
  25. GRB 140206A: Fermi GBM detection
  26. GRB 140206A: Swift/UVOT Detection
  27. GRB 140206A: theoretical prediction of redshift and of supernova occurrence
  28. GRB 140206A: Enhanced Swift-XRT position
  29. GRB 140206A: ISON-Ussuriysk optical observations
  30. GRB 140206B: Fermi-LAT detection
  31. GRB 140206A: Swift/UVOT optical detection
  32. GRB140206A: a long GRB detected by INTEGRAL
  33. GRB 140206A: Swift detection of a burst
  34. GRB 140129A: 5 GHz VLA observations
  35. GRB 140129A: Khureltogot optical limit
  36. GRB 140129B: Swift/UVOT Detection
  37. GRB 140129A: Continued RATIR Optical and NIR Observations
  38. GRB 140129B: Swift-XRT refined Analysis
  39. GRB 140129B: MASTER OT early light curve
  40. GRB 140129B, Swift-BAT refined analysis (probably not a short burst)
  41. GRB140129A: RAPTOR Observations of the Early Afterglow
  42. GRB 140129B: Enhanced Swift-XRT position
  43. GRB 140129A, Swift-BAT refined analysis
  44. GRB 140129A: Swift/UVOT Observations
  45. GRB 140129A: Swift-XRT refined Analysis
  46. GRB 140129B: MASTER OT confirmation
  47. GRB 140129B: Swift detection of a burst with an optical afterglow
  48. GRB 140129A: Enhanced Swift-XRT position
  49. GRB 140129A: ROTSE-III Detection of Optical Counterpart
  50. GRB 140129A: RATIR Optical and NIR Observations
  51. GRB 140129A: P60 optical afterglow detection
  52. GRB 140129A: Swift detection of a burst with an optical afterglow
  53. GRB 140110A: Second Follow-up Swift-XRT Observation
  54. GRB 140114A: optical upper limit
  55. Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
  56. GRB 140118A/MAXI J1421-613: Skynet PROMPT/R-COP observations
  57. GRB 140118A: RATIR Optical and NIR Observations
  58. GRB 140118A: Fermi GBM observation
  59. GRB 140118A, Swift-BAT refined analysis
  60. Swift Trigger 584155 is MAXI J1421-613
  61. GRB 140118A: Swift detection of a burst
  62. GRB 140110A: Further Swift-XRT Observation
  63. GRB 140103A: MASTER-Net early OT detection
  64. GRB 140103A: optical upper limit
  65. GRB 140108A: Mondy optical observations, refined analysis
  66. GRB 140114A: ROTSE-III Optical Limits
  67. GRB 140114A: Swift-XRT refined Analysis
  68. GRB 140114A: Swift-BAT refined analysis
  69. GRB 140114A: Swift/UVOT Upper Limits
  70. GRB 140114A: KAIT Optical Upper Limit
  71. GRB 140103A: AAO optical afterglow candidate
  72. GRB 140104B: Further Swift XRT observations
  73. GRB 140114A: Enhanced Swift-XRT position
  74. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  75. GRB 140114A: P60 Observations
  76. GRB 140114A: Swift detection of a burst
  77. GRB 140110A: Swift/UVOT retraction of UVOT candidates
  78. IPN Triangulation of GRB 140110A
  79. GRB 140110A: Swift/UVOT Observations
  80. GRB 140108A: Suzaku WAM observation of the prompt emission
  81. GRB 140110A: Swift XRT observations
  82. GRB 140110A: Reported UVOT OT not GRB afterglow
  83. GRB 140110A: OT detection in Swift/UVOT imaging
  84. GRB 140108A BAT refined analysis update *CORRECTION*
  85. GRB 140108A BAT refined analysis update
  86. GRB 140110A Tiled Swift observations
  87. GRB 140110A: Fermi-LAT detection of a burst
  88. GRB 140108A: Mondy optical upper limit
  89. GRB 140108A: Swift-BAT refined analysis
  90. GRB 140108A: Fermi GBM detection
  91. GRB 140108A: Swift/UVOT Detection
  92. GRB 140108A: theoretical prediction of redshift and of supernova occurrence
  93. GRB 140108A: Swift-XRT refined Analysis
  94. GRB 140108A: Enhanced Swift-XRT position
  95. GRB 140108A: Mondy optical observations
  96. GRB 140108A: D50+BART optical candidate detection
  97. GRB 140108A: MASTER-Net OT detection
  98. GRB 140108A: Prompt enhanced Swift-XRT position
  99. GRB 140108A: Swift detection of a burst
  100. New Fermi-LAT GRB Table

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