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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"

19666 results found.

  1. GRB 180624A: Swift-BAT refined analysis
  2. AT2018cow: Swift/BAT data search
  3. GRB 180624A: RATIR Optical Observations
  4. GRB 180624A: LBT/MODS redshift measurement
  5. GRB 180620B: AstroSat CZTI detection
  6. GRB 180620A: AstroSat CZTI detection
  7. GRB 180618A: AstroSat CZTI detection
  8. GRB 180624A: GROND observations
  9. GRB 180624A: LCO Siding Springs afterglow candidate
  10. GRB 180624A: Swift-XRT refined Analysis
  11. GRB 180624A: Swift/UVOT Upper Limits
  12. GRB 180624A: Enhanced Swift-XRT position
  13. GRB 180623A: retraction of the Swift/UVOT Detection
  14. GRB 180623A: Swift-BAT refined analysis
  15. GRB 180624A: Swift detection of a burst
  16. GRB 180623A: Swift/UVOT Detection
  17. GRB 180623A: Swift-XRT refined Analysis
  18. GRB 180623A: Enhanced Swift-XRT position
  19. GRB 180623A: Swift detection of a burst
  20. GRB 180620B: Swift/UVOT Detection
  21. GRB 180620A iTelescope observation
  22. Konus-Wind observation of GRB 180620B
  23. Konus-Wind observation of GRB 180620A
  24. Konus-Wind observation of GRB 180618A (a short GRB with extended emission)
  25. GRB 180620B: Swift-BAT refined analysis
  26. GROND observations of GRB 180620B
  27. GROND observations of GRB 180620A
  28. GRB 180620B: Swift-XRT refined Analysis
  29. GRB 180620A: Swift-BAT refined analysis
  30. GRB 180620B: Enhanced Swift-XRT position
  31. GRB 180620B: Fermi GBM detection
  32. GRB 180620A: KAIT Optical Observations
  33. GRB 180618A: Swift/UVOT Detection
  34. GRB 180620A: Swift-XRT refined Analysis
  35. GRB 180620B: Swift detection of a burst with an optical counterpart
  36. GRB 180620A: Swift/UVOT Detection
  37. GRB 180620A: LCO McDonald observations
  38. GRB 180620A: Enhanced Swift-XRT position
  39. GRB 180620A: MASTER OT observation
  40. GRB 180620A: ISON-MN afterglow confirmation
  41. GRB 180620A: RATIR Optical Afterglow Detection
  42. GRB 180620A: Swift detection of a burst with an optical counterpart
  43. GRB 180618A: MASTER OT observation (a short GRB with extended emission)
  44. GRB 180618A: Swift-BAT refined analysis (a short GRB with extended emission)
  45. GRB 180618A: Fermi GBM detection
  46. GRB 180618A: Swift-XRT refined Analysis
  47. GRB 180618A: LT prompt observations
  48. GRB 180618A: Enhanced Swift-XRT position
  49. GRB 180618A: Swift detection of a burst with an optical counterpart
  50. GRB 180614A: 1.5m OSN I-band observation
  51. GRB 180614A: Swift/UVOT Upper Limits
  52. GRB 180614A: Swift-BAT refined analysis
  53. GRB 180614A: NOT optical upper limits
  54. GRB 180614A: MASTER observation
  55. GRB 180614A: Swift-XRT refined Analysis
  56. GRB 180614A: Enhanced Swift-XRT position
  57. GRB 180614A: Swift detection of a burst
  58. GRB 180613A: Swift/UVOT Upper Limits
  59. GRB 180613A GROND observations: correction
  60. GRB 180613A GROND observations
  61. GRB 180613A, Swift-BAT refined analysis
  62. GRB 180613A: Swift-XRT refined Analysis
  63. GRB 180613A: Enhanced Swift-XRT position
  64. GRB 180613A: Prompt enhanced Swift-XRT position
  65. GRB 180613A: Swift detection of a burst
  66. GRB 180602A: Swift/UVOT Upper Limits
  67. GRB 180602A: Swift-XRT refined Analysis
  68. GRB 180602A: Swift-BAT refined analysis
  69. GRB 180602A: Enhanced Swift-XRT position
  70. GRB 180602A: Swift detection of a burst
  71. IPN Triangulation of GRB 180529A (short/hard)
  72. Swift Trigger 834937 is not a GRB
  73. IPN Triangulation of GRB 180523A
  74. GRB 180514A: Swift/UVOT Upper Limits
  75. GRB 180510A: MITSuME Ishigakijima optical upper limits
  76. GRB 180514A: Swift-BAT refined analysis
  77. GRB 180514A: Swift-XRT refined Analysis
  78. GRB 180514A: Enhanced Swift-XRT position
  79. GRB 180512A: VLT/HAWK-I NIR Observations
  80. GRB 180514A: Swift detection of a burst
  81. Konus-Wind observation of GRB 180510A
  82. GRB 180512A: Swift-XRT refined Analysis
  83. GRB 180512A: Swift-BAT refined analysis
  84. GRB 180512A: RATIR Optical Observations
  85. GRB 180512A: LBT optical detection
  86. GRB 180512A: Swift/UVOT Upper Limits
  87. GRB 180512A: LT prompt observations
  88. GRB 180512A: Enhanced Swift-XRT position
  89. GRB 180512A: GROND upper limits
  90. GRB 180512A: NOT upper limits
  91. GRB 180512A: OASDG optical observations
  92. GRB 180512A: Upper limits from OSN
  93. GRB 180512A: Swift detection of a burst
  94. GRB 180510A: Swift/UVOT followup observations
  95. GRB 180510B: Swift-XRT refined Analysis
  96. GRB 180510A: Swift-XRT refined Analysis
  97. Swift trigger 831888: misidentification of 4U 1416-62
  98. GRB 180510B: Swift-BAT refined analysis
  99. GRB 180510B: GROND detection in all bands
  100. GRB 180510B: TAROT La Silla observatory optical observations

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