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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 080710, Swift-BAT refined analysis
  2. GRB 080710: Swift-XRT refined analysis
  3. GRB080710: Swift/UVOT observations
  4. GRB 080710: Enhanced Swift-XRT position
  5. UVOT white band observations of GRB080710
  6. GRB 080710: KAIT OA candidate
  7. GRB 080710: Swift XRT position
  8. GRB 080710: Swift detection of a burst
  9. GRB 080707: possible break in the X-rays
  10. New Swift-XRT GRB products available online.
  11. GRB 080707: GROND Confirmation of the Optical Afterglow
  12. UVOT observations of GRB080707
  13. GRB 080707, Swift-BAT refined analysis
  14. GRB 080707: Swift XRT refined analysis
  15. GRB 080707: Enhanced Swift-XRT position
  16. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  17. GRB 080707: Swift detection of a burst
  18. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  19. Trigger 316063: Swift detection of a transient
  20. GRB 080703: GROND Upper Limits
  21. GRB 080702B: GROND Upper Limits
  22. GRB 080703: Swift-XRT refined analysis
  23. GRB 080703: UVOT Follow-Up Observation
  24. GRB 080703: Enhanced Swift-XRT position
  25. GRB 080703, Swift-BAT refined analysis
  26. GRB 080702B Swift-BAT refined analysis
  27. GRB 080703: Swift detection of a burst with optical afterglow
  28. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  29. Swift/UVOT observation of GRB080702A
  30. GRB 080702B: Swift XRT and UVOT observations
  31. GRB 080701A: Early RAPTOR optical limits
  32. Swift Trigger 315630: Swift/UVOT Upper Limits
  33. GRB 080702A, Swift-BAT refined analysis
  34. GRB 080702A: Swift-XRT Team refined analysis
  35. GRB 080702B : Burst detected in BAT during Swift slew
  36. GRB 080702A: Enhanced Swift-XRT position
  37. Swift Trigger 315630: TLS R-band observation
  38. Swift Trigger 315630: Probably not a GRB
  39. GRB 080702: Swift detection of a short burst
  40. GRB 080701: Swift-XRT refined analysis
  41. TLS I-Band Observation of GRB 080701A
  42. GRB 080701A: Swift/UVOT Upper Limits
  43. GRB 080701: Enhanced Swift-XRT position
  44. GRB 080701A, Swift-BAT refined analysis
  45. Trigger 315630: Swift detection of a possible burst
  46. GRB 080701: Swift-XRT Prompt Analysis
  47. GRB 080701: Swift detection of a burst
  48. GRB 080623: Suzaku WAM observation of the prompt emission
  49. GRB 080625: Swift/UVOT Follow-Up Observations
  50. GRB 080625:Swift-XRT detection of the afterglow
  51. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  52. GRB 080623: GROND upper limits
  53. GRB080623: Swift UVOT followup observations
  54. GRB 080623: Swift-XRT refined analysis
  55. GRB 080623, Swift-BAT refined analysis
  56. GRB 080623: Enhanced Swift-XRT position
  57. GRB 080623: TAROT La Silla observatory optical observations
  58. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  59. GRB 080623: Swift XRT prompt analysis
  60. GRB 080623: Swift detection of a burst
  61. Swift trigger 314975 is not a GRB
  62. Swift-BAT trigger 314975 possible burst
  63. GRB080607: optical observation
  64. GRB 080603b: optical observation
  65. GRB 070809: Putative host galaxy and redshift
  66. Konus-Wind observation of GRB 080613B
  67. GRB 080613A: Swift-XRT detection of the afterglow
  68. GRB080613A: Swift/UVOT Upper Limits
  69. GRB 080613B: GROND Upper Limits
  70. GRB080613B: Swift/UVOT Upper Limits
  71. GRB 080613B, Swift-BAT refined analysis
  72. GRB 080613B: Swift-XRT refined analysis
  73. GRB 080613B: Swift detection of a burst
  74. GRB 080603b: optical observation
  75. Swift observations of BAT Slew Survey event (Trigger=010)
  76. GRB 080603A: final Swift-XRT observations.
  77. GRB 080607: AGILE-MCAL observation of the prompt emission
  78. GRB 080603B - TLS 2nd Epoch: Another Break
  79. GRB 080605: TLS 3rd Epoch - Source Confusion
  80. Konus-Wind observation of GRB 080607
  81. GRB080607: RTT150 optical observations
  82. GRB 080607: Swift-XRT refined analysis
  83. Swift/UVOT Observations of GRB080607
  84. GRB 080605: optical observations
  85. GRB 080607 KAIT observations
  86. Konus-Wind observation of GRB 080605
  87. GRB 080607: Enhanced Swift-XRT position
  88. GRB 080607, Swift-BAT refined analysis
  89. GRB 080605: GROND 2nd epoch observations
  90. GRB 080607: Swift detection of a burst with optical afterglow
  91. GRB 080607: ROTSE-III Detection of Optical Counterpart
  92. GRB 080605: Swift-UVOT refined analysis
  93. GRB 080604: VLA radio upper limit
  94. GRB 080605, Swift-BAT refined analysis
  95. GRB 080603B: VLA radio upper limit
  96. GRB 080605, Swift-BAT refined analysis
  97. GRB 080605: Swift-XRT refined analysis
  98. GRB 080605: MASTER VWF 46 s AT observation
  99. GRB 080605: Enhanced Swift-XRT position
  100. GRB 080605: GROND detection of the optical afterglow candidate

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