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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"

37679 results found.

  1. GRB 160519A: Fermi GBM detection
  2. Konus-Wind observation of a bright burst from SGR 1935+2154
  3. FERMI GBM bursts from the magnetar SGR 1935+2154
  4. GRB 160519A: Swift detection of a burst
  5. SGR 1935+2154: AbAO optical upper limit
  6. Fermi GBM triggers of SGR 1935+2154
  7. Fermi GBM trigger 485205628 /160517806 is not a GRB
  8. Fermi GBM trigger 485124591/160516868 is not a GRB
  9. Fermi GBM trigger 484906918/160514349 is not a GRB
  10. GRB 160509A: Further VLA Observations
  11. Interplanetary Network Search for IceCube 160427A
  12. GRB 160509A MASTER-NET observations
  13. GRB 160509A: CALET Gamma-Ray Burst Monitor detection
  14. GRB 160509A: non-observation of VHE emission with HAWC
  15. GRB 160508A: CALET Gamma-Ray Burst Monitor detection
  16. GRB 160509A: TLS Tautenburg Afterglow Detection
  17. GRB 160509A: Further Swift/UVOT Observations
  18. GRB 160509A Gemini North redshift
  19. Fermi GBM trigger 484574960/160510506 is not a GRB
  20. Konus-Wind observation of GRB 160509A
  21. GRB 160509A: DCT Imaging / Afterglow Confirmation
  22. GRB 160509A: MAXI/GSC refined analysis
  23. GRB 160509A: VLA Detection
  24. GRB 160509A: Fermi-LAT refined analysis
  25. GRB 160509A: Swift/UVOT Upper Limit
  26. GRB 160509A: Fermi GBM Detection
  27. GRB 160509A Gemini North candidate afterglow
  28. GRB 160509A: optical observations
  29. GRB 160509A: Swift-XRT afterglow detection
  30. GRB 160509A: Preliminary XRT positon
  31. GRB 160509A: Tiled Swift observations
  32. Correction to GCN 19404; GRB 160509A: MAXI/GSC detection
  33. GRB 160227A: MAXI/GSC detection
  34. GRB 160509A: Fermi-LAT prompt detection of a very bright burst
  35. GRB 160506A: TAROT La Silla observatory optical observations
  36. GRB 160506A: IRSF upper limits
  37. GRB 160506A: Swift-XRT refined Analysis
  38. GRB 160506A: Swift/UVOT Upper Limits
  39. GRB 160506A: Swift-BAT refined analysis
  40. GRB 160506A: GROND upper limits
  41. GRB 160506A: Enhanced Swift-XRT position
  42. GRB 160506A: Swift detection of a burst
  43. GRB 160504A: Swift-BAT refined analysis
  44. GRB 160504A: RATIR Optical and NIR Observations
  45. GRB 160504A: Swift/UVOT Upper Limits
  46. GRB 160504A: Bassano Bresciano Observatory upper limits
  47. GRB 160504A: Swift-XRT refined Analysis
  48. GRB 160504A: Enhanced Swift-XRT position
  49. GRB 160504A: NOT upper limits
  50. GRB 160417A, the review of the sky area in plate archive
  51. GRB 160504A: TAROT Calern observatory optical observations
  52. GRB 160504A: Swift detection of a burst
  53. ICECUBE-160427A : Pan-STARRS imaging and optical transients in the field
  54. GRB 160503A: Fermi GBM observation
  55. GRB 160503A: Fermi-LAT detection
  56. GRB 160501A: SMARTS optical/IR observations
  57. GRB 160501A: Swift-BAT refined analysis
  58. GRB 160501A: GROND Upper limits
  59. GRB 160501A: MITSuME Okayama upper limits
  60. GRB 160501A: UKIRT near-IR upper limits
  61. GRB 160501A: Swift/UVOT Upper Limits
  62. GRB 160501A: Swift-XRT refined Analysis
  63. GRB 160501A: RATIR Optical and NIR Observations
  64. GRB 160501A: Enhanced Swift-XRT position
  65. GRB 160501A: TAROT Calern observatory optical observations
  66. GRB 160501A MASTER-NET early observations
  67. GRB 160501A: NOT optical and NIR observations
  68. GRB 160501A: Swift detection of a burst
  69. IceCube-160427A: Fermi GBM Observations
  70. Fermi/LAT search for counterpart to the IceCube event 67093193 (run 127853)
  71. GRB 160422A: XRT Afterglow Confirmation
  72. LSGT observation of GRB 160425A
  73. GRB 160425A: Swift/UVOT Detection
  74. GRB 160425A: Skynet PROMPT-CTIO observations of the optical afterglow
  75. GRB 160425A: Swift-BAT refined analysis
  76. GRB 160425A: SMARTS optical/IR observations
  77. GRB 160325A: Skynet PROMPT-CTIO observations of the optical afterglow
  78. GRB 160422A: GROND NIR afterglow detection
  79. GRB 160425A MASTER notices: possible host galaxy in the optical error-box
  80. GRB 160425A VLT/X-shooter redshift
  81. GRB 160425A: GROND observation
  82. GRB 160425A: Swift-XRT refined Analysis
  83. GRB 160425A: Enhanced Swift-XRT position
  84. GRB 160422A: Swift/UVOT Afterglow Confirmation
  85. GRB 160422A: CALET Gamma-Ray Burst Monitor detection
  86. GRB 160425A : MASTER earlier optical observations
  87. GRB 160425A: Swift detection of an unusual burst with an optical afterglow
  88. Konus-Wind observation of GRB 160424A
  89. GRB 160424A: Fermi GBM observation
  90. GRB 160424A - XRT position uncertain
  91. GRB 160424A: Swift-BAT refined analysis
  92. GRB 160424A: Swift/UVOT Upper Limit
  93. GRB 160424A: Swift-XRT observations
  94. GRB 160424A: Swift detection of a burst
  95. GRB 160422A: Swift-XRT afterglow detection
  96. GRB 160422A: Swift/UVOT Candidate Afterglow
  97. GRB 160419A: CALET Gamma-Ray Burst Monitor detection
  98. GRB 160422A: Fermi GBM observation
  99. GRB 160422A: Swift ToO observations
  100. GRB 160422A: Fermi-LAT Detection

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