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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"

43726 results found.

  1. GRB 140402A: Swift/UVOT Upper Limits
  2. GRB 140331A: Continued RATIR Optical and NIR Observations
  3. GRB 140402A: Swift-XRT observations
  4. GRB 140402A: MASTER optical observations
  5. GRB 140402A BAT refined analysis
  6. GRB 140402A: Marginal BAT detection
  7. GRB 140402A: Fermi GBM detection
  8. GRB 140402A: Fermi-LAT detection of a burst
  9. Swift trigger 594286: Is likely a noise trigger
  10. GRB 140330A: Fermi GBM observation
  11. GRB 140331A: Swift-XRT refined Analysis
  12. GRB 140301A: Zadko observatory - Gingin optical observations
  13. GRB 140331A: Swift-BAT refined analysis
  14. Retraction of the Fermi/LAT high-energy counterpart for GRB 140330A
  15. GRB 140302A: TAROT La Silla observatory optical observations
  16. GRB 140323A: Zadko observatory - Gingin optical observations
  17. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  18. GRB 140331A: Zadko observatory - Gingin optical observations
  19. Konus-Wind observation of GRB 140330A
  20. GRB 140129B: AAO optical upper limit
  21. GRB 140129A: Mondy optical observations
  22. GRB 140331A: Enhanced Swift-XRT position
  23. IPN triangulation of GRB 130330A
  24. GRB 140331A: RATIR Optical and NIR Observations
  25. GRB 140331A: Swift detection of a burst
  26. GRB 140330A: Fermi-LAT Detection
  27. GRB 140329A: Fermi-LAT detection
  28. Konus-Wind observation of GRB 140329A
  29. IPN Triangulation of GRB 140329A
  30. MAXI ID=745548350 is UV Ceti
  31. GRB 140320D: MASTER optical observations
  32. GRB 140329A: Fermi GBM observation of a bright burst
  33. Swift trigger 593744: detection of a flare from UV Cet
  34. GRB 140320D: Suzaku WAM observation of the prompt emission
  35. GRB 140323A : Suzaku WAM observation of the prompt emission
  36. Fermi Gamma-ray Burst Monitor trigger 417486540 / 140326020 is not a GRB
  37. GRB 140226A/iPTF14yb: Mondy optical observations
  38. GRB 140320C: Mondy optical observations and afterglow confirmation
  39. Konus-Wind observation of GRB 140323A
  40. GRB 140323A: Fermi-LAT detection
  41. GRB 140323A: Swift-XRT refined Analysis
  42. GRB 140323A: Fermi GBM observation
  43. GRB 140323A: BOOTES-3 optical upper limit.
  44. GRB 140323A: Swift-BAT refined analysis
  45. GRB 140323A: Enhanced Swift-XRT position
  46. GRB 140323A: Swift detection of a burst
  47. GRB 140320A: RATIR Optical and NIR Observations
  48. Konus-Wind observation of GRB 140320D
  49. GRB 140320B: P60 detection of a very red afterglow
  50. IPN Triangulation of very intense GRB 140320D
  51. GRB 140320C: Mini-GWAC prompt observation
  52. GRB 140320A: Swift-BAT refined analysis
  53. GRB 140320C: Swift-XRT observations
  54. GRB 140320A: Confirmation of a fading X-ray afterglow
  55. GRB 140320C: Swift-XRT detection of the X-ray afterglow
  56. GRB 140320A: Fermi GBM detection
  57. GRB 140320B: Swift-XRT detection of the afterglow
  58. GRB 140320C: Mondy optical observations
  59. GRB 140320A: Enhanced Swift-XRT position
  60. GRB 140320A: Swift-XRT detection of an afterglow candidate
  61. GRB 140320C: MASTER optical observations
  62. GRB 140320C: FTN optical observations
  63. GRB 140320C: A long GRB detected by INTEGRAL
  64. GRB 140320B: ISON-NM optical observations
  65. GRB 140320B: A long GRB detected by INTEGRAL
  66. GRB 140320B: FTN optical afterglow candidate
  67. Swift Trigger 592558 is not an astrophysical source
  68. GRB 140320A: Fermi GBM observations suggest a short GRB
  69. GRB 140320A: Swift detection of a burst
  70. GRB 140318A: Continued RATIR Optical and NIR Observations
  71. GRB 140318A: Mondy optical limit
  72. GRB 140318A: Swift-BAT refined analysis
  73. GRB 140311B: Mondy optical limit
  74. GRB 140311A: Mondy optical limits
  75. GRB 140318A: Swift-XRT refined Analysis
  76. GRB 140318A: Liverpool Telescope optical observations
  77. GRB 140318A: Enhanced Swift-XRT position
  78. GRB 140318A: RATIR Optical and NIR Detections
  79. GRB140318A: Discovery Channel Telescope Optical Detection
  80. GRB 140318A: WHT spectroscopy
  81. GRB 140318A: NOT detection of the afterglow
  82. GRB 140318A: Swift detection of a burst
  83. GRB 140311A: VLA Detection
  84. GRB140308A: Suzaku WAM observation of the prompt emission
  85. GRB 140311C: MASTER optical observations
  86. GRB 140311C: Swift-XRT and UVOT observations
  87. GRB 140311C: MASTER before, during and after trigger optical observations
  88. GRB 140311A: further NOT observations
  89. GRB 140311B: Swift-BAT refined analysis
  90. GRB 140311A: RATIR Optical and NIR Detection
  91. GRB 140311C: Fermi GBM Detection
  92. GRB 140311B: Fermi GBM Detection
  93. GRB 140311A: Kottamia I-band observation
  94. GRB 140311A: Swift/UVOT Upper Limits
  95. Fermi416242156: possible iPTF counterpart
  96. GRB 140311B: RATIR Optical and NIR Observations
  97. GRB 140311A: Bassano Bresciano Observatory optical upper limit
  98. GRB 140311A: Swift-XRT refined Analysis
  99. GRO J1744-28: Fermi GBM observation
  100. GRB 140311A: Gemini-North redshift

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