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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"

19609 results found.

  1. GRB 080623: Swift-XRT refined analysis
  2. GRB 080623, Swift-BAT refined analysis
  3. GRB 080623: Enhanced Swift-XRT position
  4. GRB 080623: TAROT La Silla observatory optical observations
  5. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  6. GRB 080623: Swift XRT prompt analysis
  7. GRB 080623: Swift detection of a burst
  8. Swift trigger 314975 is not a GRB
  9. Swift-BAT trigger 314975 possible burst
  10. GRB080607: optical observation
  11. GRB 080603b: optical observation
  12. GRB 070809: Putative host galaxy and redshift
  13. Konus-Wind observation of GRB 080613B
  14. GRB 080613A: Swift-XRT detection of the afterglow
  15. GRB080613A: Swift/UVOT Upper Limits
  16. GRB 080613B: GROND Upper Limits
  17. GRB080613B: Swift/UVOT Upper Limits
  18. GRB 080613B, Swift-BAT refined analysis
  19. GRB 080613B: Swift-XRT refined analysis
  20. GRB 080613B: Swift detection of a burst
  21. GRB 080603b: optical observation
  22. Swift observations of BAT Slew Survey event (Trigger=010)
  23. GRB 080603A: final Swift-XRT observations.
  24. GRB 080607: AGILE-MCAL observation of the prompt emission
  25. GRB 080603B - TLS 2nd Epoch: Another Break
  26. GRB 080605: TLS 3rd Epoch - Source Confusion
  27. Konus-Wind observation of GRB 080607
  28. GRB080607: RTT150 optical observations
  29. GRB 080607: Swift-XRT refined analysis
  30. Swift/UVOT Observations of GRB080607
  31. GRB 080605: optical observations
  32. GRB 080607 KAIT observations
  33. Konus-Wind observation of GRB 080605
  34. GRB 080607: Enhanced Swift-XRT position
  35. GRB 080607, Swift-BAT refined analysis
  36. GRB 080605: GROND 2nd epoch observations
  37. GRB 080607: Swift detection of a burst with optical afterglow
  38. GRB 080607: ROTSE-III Detection of Optical Counterpart
  39. GRB 080605: Swift-UVOT refined analysis
  40. GRB 080604: VLA radio upper limit
  41. GRB 080605, Swift-BAT refined analysis
  42. GRB 080603B: VLA radio upper limit
  43. GRB 080605, Swift-BAT refined analysis
  44. GRB 080605: Swift-XRT refined analysis
  45. GRB 080605: MASTER VWF 46 s AT observation
  46. GRB 080605: Enhanced Swift-XRT position
  47. GRB 080605: GROND detection of the optical afterglow candidate
  48. GRB080605: optical observations
  49. GRB 080605: Liverpool Telescope optical afterglow candidate
  50. GRB 080605: Swift/UVOT Position of the Optical Afterglow
  51. GRB 080605: TLS RRM Afterglow
  52. GRB 080605: Swift detection of a burst with an optical afterglow
  53. GRB 080603B: TLS Afterglow Observation
  54. Swift/UVOT observations of GRB080604
  55. GRB 080604, Swift-BAT refined analysis
  56. GRB 080604: Swift-XRT refined analysis
  57. GRB 080603B : Liverpool Telescope Observations
  58. Konus-Wind observation of GRB 080603B
  59. GRB 080603B: Swift-XRT refined analysis
  60. GRB 080603A: Swift-XRT detection of the afterglow
  61. GRB 080603B: Swift/UVOT detection of the afterglow
  62. GRB 080604: Enhanced Swift-XRT position
  63. GRB 080603B, Swift-BAT refined analysis
  64. GRB 080603A: Swift/UVOT detection of the afterglow
  65. GRB080603B: RTT150 optical observations, break in light curves
  66. GRB 080604: Early Super-LOTIS Observations
  67. GRB 080604: Swift detection of a burst with an optical afterglow
  68. GRB 080516: TAROT La Silla observatory optical observations
  69. GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
  70. GRB 080603B: Swift detection of a burst with optical afterglow
  71. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  72. SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
  73. GRB 080602, Swift-BAT refined analysis
  74. GRB 080602: Swift-XRT refined analysis
  75. Konus-Wind observation of GRB 080602
  76. GRB 080602: Enhanced Swift-XRT position
  77. GRB 080602: Swift detection of a burst
  78. Swift analysis of BAT Slew Survey event (Trigger=009)
  79. Konus-Wind observation of reactivation of SGR 1627-41
  80. Reactivation of SGR 1627-41
  81. GRB 080524: Swift XRT and UVOT analysis
  82. GRB 080524: Swift-BAT detection of a burst in ground analysis
  83. GRB 080523: Swift-XRT refined analysis
  84. GRB 080523, Swift-BAT refined analysis
  85. Swift/UVOT observations of GRB 080523
  86. GRB 080523: Enhanced Swift-XRT position
  87. GRB 080523: Swift detection of a burst
  88. GRB 80516: Swift/UVOT Observations
  89. GRB 080515: Swift-XRT position and analysis
  90. GRB 080520, Swift-BAT refined analysis
  91. GRB 080514B: pseudo-z= 1.8 from prompt emission spectrum
  92. GRB 080514B: UVOT Observations
  93. GRB080520: Swift/UVOT observations
  94. GRB 080520, GROND observations
  95. GRB 080520: Enhanced Swift-XRT position
  96. GRB 080520: Swift XRT Refined Analysis
  97. GRB 080520: Swift detection of a burst with optical afterglow
  98. GRB 080514B: second epoch Swift XRT data confirms the X-ray afterglow
  99. GRB 080517, Swift-BAT refined analysis
  100. GRB 080517: Swift-XRT refined analysis

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