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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"

45716 results found.

  1. GRB 140414A: Swift-XRT observations
  2. GRB 140414A: TNG optical observations
  3. GRB 140414A: Swift-BAT refined analysis
  4. GRB 140414A: Short burst found in ground analysis of BAT slew data
  5. GRB 140413A: Swift/UVOT Observations of the Optical Afterglow
  6. GRB 140412A: Swift/UVOT Upper Limits
  7. Konus-Wind observation of GRB 140413A
  8. GRB 140413A: Swift-XRT refined Analysis
  9. GRB 140413A: Swift-BAT refined analysis
  10. GRB 140412A: Swift-XRT refined Analysis
  11. GRB 140412A: Swift-BAT refined analysis
  12. GRB 140413A: TAROT La Silla observatory optical observations
  13. GRB 140413A: Swift-XRT observations
  14. GRB 140412A: Enhanced Swift-XRT position
  15. GRB 140413A: GROND afterglow candidate
  16. Swift Trigger 595616: a possible GRB
  17. GRB 140412A: Swift detection of a burst
  18. GRB 140408A: 1.5m OSN optical upper limit
  19. Swift Trigger 595345 is not an astrophysical source
  20. Swift-BAT trigger 595162 is noise
  21. GRB 140408A: MITSuME Akeno Optical observation
  22. Fermi418277210: iPTF optical observations
  23. GRB 140408A: RATIR Optical Upper Limits
  24. GRB 140408A: Swift-BAT refined analysis
  25. GRB 140408A: GROND Detection of an Afterglow Candidate
  26. GRB 140408A: Swift/UVOT Upper Limits
  27. GRB 140408A: Swift-XRT refined Analysis
  28. GRB 140408A: MITSuME Okayama upper limits
  29. GRB 140408A: Enhanced Swift-XRT position
  30. GRB 140408A: Fermi GBM detection
  31. Swift Trigger 595162: a possible GRB
  32. GRB 140408A: Swift detection of a burst
  33. GRB 140406A: Fermi GBM observation
  34. GRB 140402A: Deep limit on the optical afterglow from Magellan observations
  35. GRB 111225A: Archeological redshift of the Christmas Burst 2011 from GTC
  36. GRB 140402A: Swift/UVOT Upper Limits
  37. GRB 140331A: Continued RATIR Optical and NIR Observations
  38. GRB 140402A: Swift-XRT observations
  39. GRB 140402A: MASTER optical observations
  40. GRB 140402A BAT refined analysis
  41. GRB 140402A : Xinglong TNT upper limit
  42. GRB 140402A: Marginal BAT detection
  43. GRB 140402A: Fermi GBM detection
  44. GRB 140402A: Fermi-LAT detection of a burst
  45. Swift trigger 594286: Is likely a noise trigger
  46. GRB 140219A: Correction to GCN 15885 (Suzaku-WAM fluence)
  47. GRB 140330A: Fermi GBM observation
  48. GRB 140331A: Swift-XRT refined Analysis
  49. GRB 140301A: Zadko observatory - Gingin optical observations
  50. GRB 140331A: Swift-BAT refined analysis
  51. Retraction of the Fermi/LAT high-energy counterpart for GRB 140330A
  52. GRB 140331A: Swift/UVOT Upper Limits
  53. GRB 140302A: TAROT La Silla observatory optical observations
  54. GRB 140323A: Zadko observatory - Gingin optical observations
  55. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  56. GRB 140331A: Zadko observatory - Gingin optical observations
  57. Konus-Wind observation of GRB 140330A
  58. GRB 140129B: AAO optical upper limit
  59. GRB 140129A: Mondy optical observations
  60. GRB 140331A: MITSuME Okayama upper limits
  61. GRB 140331A: Enhanced Swift-XRT position
  62. IPN triangulation of GRB 130330A
  63. GRB 140331A: RATIR Optical and NIR Observations
  64. GRB 140331A: Swift detection of a burst
  65. GRB 140330A: Fermi-LAT Detection
  66. GRB 140329A: Fermi-LAT detection
  67. Konus-Wind observation of GRB 140329A
  68. IPN Triangulation of GRB 140329A
  69. MAXI ID=745548350 is UV Ceti
  70. GRB 140320D: MASTER optical observations
  71. GRB 140329A: Fermi GBM observation of a bright burst
  72. Swift trigger 593744: detection of a flare from UV Cet
  73. GRB 140320D: Suzaku WAM observation of the prompt emission
  74. GRB 140323A : Suzaku WAM observation of the prompt emission
  75. Fermi Gamma-ray Burst Monitor trigger 417486540 / 140326020 is not a GRB
  76. GRB 140226A/iPTF14yb: Mondy optical observations
  77. GRB 140320C: Mondy optical observations and afterglow confirmation
  78. Konus-Wind observation of GRB 140323A
  79. GRB 140323A: Fermi-LAT detection
  80. GRB 140323A: Swift-XRT refined Analysis
  81. GRB 140323A: Fermi GBM observation
  82. GRB 140323A: BOOTES-3 optical upper limit.
  83. GRB 140323A: Swift/UVOT Upper Limits
  84. GRB 140323A: Swift-BAT refined analysis
  85. GRB 140323A: Enhanced Swift-XRT position
  86. GRB 140323A: Swift detection of a burst
  87. GRB 140320A: RATIR Optical and NIR Observations
  88. Konus-Wind observation of GRB 140320D
  89. GRB 140320B: P60 detection of a very red afterglow
  90. IPN Triangulation of very intense GRB 140320D
  91. GRB 140320C: Mini-GWAC prompt observation
  92. GRB 140320C: Swift/UVOT Upper Limits
  93. GRB 140320A: Swift-BAT refined analysis
  94. GRB 140320B: Swift/UVOT Upper Limits
  95. GRB 140320A: Swift/UVOT Upper Limits
  96. GRB 140320C: Swift-XRT observations
  97. GRB 140320A: Confirmation of a fading X-ray afterglow
  98. GRB 140320C: Swift-XRT detection of the X-ray afterglow
  99. GRB 140320A: Fermi GBM detection
  100. GRB 140320B: Swift-XRT detection of the afterglow

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