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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"

19662 results found.

  1. GRB 140818A Tiled Swift observations
  2. GRB 140817A: Swift-XRT refined Analysis
  3. GRB 140817A: Fermi GBM Detection
  4. GRB 140817A: Swift-BAT refined analysis
  5. GRB 140817A draft circular on nearby galaxy
  6. GRB 140817A: Enhanced Swift-XRT position
  7. GRB 140817A: Swift-XRT position
  8. GRB 140817A: Swift detection of a burst
  9. Swift Trigger 609694 is probably not an astrophysical source
  10. GRB 140815A: Swift-XRT observations
  11. GRB 140814A: Swift-XRT and UVOT observations
  12. GRB 140814A: Swift-XRT and UVOT observations
  13. Swift Mission Operations Center Moving
  14. GRB 140808A: Confirmation of the Swift-XRT afterglow
  15. GRB140810A: Fermi-LAT detection
  16. Swift trigger 609139 is probably 4U 1850-03
  17. Swift observations of possible GRB 140809A candidate
  18. GRB 140808A: Swift/UVOT Upper Limits
  19. GRB 140808A: Swift-XRT observations
  20. GRB 140808A: optical afterglow candidate iPTF14eag
  21. GRB140801A: Swift/XRT further observations
  22. GRB 140730A: GROND Upper limits
  23. GRB 140801A: Swift/UVOT Upper Limits
  24. GRB 140801A: Swift-XRT observations
  25. GRB 140730A, Swift-BAT refined analysis
  26. GRB 140709B: TShAO optical upper limit
  27. Swift Trigger 607945: possible noise event in the direction of NGC2559
  28. GRB 140730A: LCO-Sutherland observations
  29. GRB 140730A: Swift-XRT refined Analysis
  30. GRB 140730A: Swift/UVOT Upper Limits
  31. GRB 140730A: Enhanced Swift-XRT position
  32. GRB 140730A: Prompt enhanced Swift-XRT position
  33. GRB 140730A: Swift detection of a burst
  34. Swift Trigger 607506 is probably noise
  35. GRB 140729A: Swift-XRT and UVOT observations
  36. IPN Triangulation of GRB 140729A
  37. GRB 140729A Tiled Swift observations
  38. GRB 140729A: Fermi-LAT detection
  39. Trigger 607399: Swift detection of SGR1806-20
  40. GRB 140723A: Swift-XRT and UVOT observations
  41. GRB 140723A Tiled Swift observations
  42. GRB 140723A: Fermi-LAT detection
  43. GRB 140709B: Swift/UVOT Upper Limits
  44. GRB 140719B: Swift XRT observation
  45. GRB 140719A: Swift/UVOT Upper Limits
  46. GRB 140716A: Confirmation of the Swift-XRT afterglow
  47. GRB 140719B, Swift-BAT refined analysis
  48. GRB 140716A: GROND confirmation of the afterglow
  49. GRB 140719A, Swift-BAT refined analysis
  50. GRB 140719A: FTS observations
  51. GRB 140719A: GROND Afterglow candidate
  52. GRB 140719B: Zadko observatory - Gingin optical observations
  53. GRB 140719B: Swift detection of a burst
  54. GRB 140719A: Swift-XRT refined Analysis
  55. GRB 140719A: Enhanced Swift-XRT position
  56. GRB 140719A: Swift detection of a burst
  57. Konus-Wind observation of GRB 140716A
  58. GRB 140716A: Swift/UVOT Upper Limits
  59. GRB 140713A: 10.4-m GTC deep optical observation
  60. GRB 140716A: GROND afterglow candidate
  61. GRB 140716A: Swift-XRT detection of an afterglow candidate
  62. GRB 140716A: A Fermi GBM Detection
  63. GRB 140716A BAT refined analysis
  64. Swift observations of a flare from UX Ari
  65. GRB 140716A found in ground analysis of Swift-BAT data
  66. Swift detection of UX Ari
  67. GRB 140713A: CARMA mm detection
  68. GRB 140713A: Fermi GBM detection
  69. GRB 140713A: Swift-XRT refined Analysis
  70. GRB 140713A: Swift/UVOT Upper Limits
  71. GRB 140713A: Enhanced Swift-XRT position
  72. GRB 140713A: Swift-BAT refined analysis
  73. GRB 140710A: iTelescope.Net T11 Optical Observation
  74. GRB 140713A: Swift detection of a burst
  75. Swift Trigger 604111 is not a GRB
  76. Fermi GBM Observations of SGR 1935+2154
  77. GRB 140709A: Continued RATIR Optical and NIR Observations
  78. GRB 140710A: Swift-XRT refined Analysis
  79. GRB 140710A: Swift-BAT refined analysis
  80. GRB 140710A: Swift/UVOT Upper Limits
  81. GRB 140710A: Enhanced Swift-XRT position
  82. GRB 140710A: RATIR Optical and NIR Observations
  83. GRB 140710A: P60 Confirmation of Afterglow
  84. GRB 140710A: GROND Detection of NIR Afterglow Candidate
  85. GRB 140710A: Swift detection of a burst
  86. GRB 140709B: Swift-XRT refined Analysis
  87. GRB 140709B: Fermi GBM detection
  88. GRB 140709B: Swift-BAT refined analysis
  89. GRB 140709B: OSN optical limit
  90. GRB 140709B: Enhanced Swift-XRT position
  91. GRB 140709A: Fermi GBM detection
  92. GRB 140709A: BOOTES-2 and OSN optical observations
  93. GRB 140709A, Swift-BAT refined analysis
  94. GRB 140709B: MASTER optical observation
  95. GRB 140709B: Swift detection of a burst
  96. GRB 140709A: Swift-XRT refined Analysis
  97. GRB 140709A: Swift/UVOT Upper Limits
  98. GRB 140709A - UVOT-enhanced XRT position
  99. GRB 140709A: RATIR Optical and NIR Observations
  100. GRB 140709A: Swift detection of a burst

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