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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"

29110 results found.

  1. GRB 080723B - Swift-XRT refined analysis
  2. GRB 080723B - Swift-XRT position
  3. GRB 080723, Swift-BAT refined analysis
  4. GRB 080723A: Swift-XRT refined analysis
  5. GRB 080723B: Detection and Localization by SuperAGILE
  6. GRB 080723: Swift detection of a burst
  7. GRB 080721: UVOT Follow-Up Observations
  8. Konus-Wind observation of GRB 080721
  9. GRB 080721: Swift-XRT refined analysis
  10. GRB 080721, Swift-BAT refined analysis
  11. GRB 080721: Swift/UVOT Photometric Redshift
  12. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  13. Retraction of Swift Trigger 317393
  14. Trigger 317393: Swift detection of a possible GRB
  15. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  16. GRB 080714: GROND confirmation of the optical/NIR afterglow
  17. Konus-Wind observation of GRB 080714
  18. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  19. GRB 080714: Swift-XRT refined analysis
  20. GRB 080714: Swift-BAT refined analysis
  21. GRB 080714: Swift detection of a burst
  22. GRB 080710: Optical observation with MITSuME Okayama
  23. GRB 080710, Swift-BAT refined analysis
  24. GRB 080710: Rapid PROMPT Observations
  25. GRB 080710: Swift-XRT refined analysis
  26. GRB080710: Swift/UVOT observations
  27. UVOT white band observations of GRB080710
  28. GRB 080710: KAIT OA candidate
  29. GRB 080710: Swift XRT position
  30. GRB 080710: Swift detection of a burst
  31. GRB 080707: possible break in the X-rays
  32. GRB 080707: GROND Confirmation of the Optical Afterglow
  33. UVOT observations of GRB080707
  34. GRB 080707, Swift-BAT refined analysis
  35. GRB 080707: Swift XRT refined analysis
  36. GRB 080707: VLT redshift
  37. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  38. GRB 080707: Swift detection of a burst
  39. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  40. Trigger 316063: Swift detection of a transient
  41. GRB 080703: GROND Upper Limits
  42. GRB 080702B: GROND Upper Limits
  43. GRB 080703: Swift-XRT refined analysis
  44. GRB 080703: UVOT Follow-Up Observation
  45. GRB 080703, Swift-BAT refined analysis
  46. GRB 080703: Swift detection of a burst with optical afterglow
  47. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  48. Swift/UVOT observation of GRB080702A
  49. GRB 080702A: MITSuME Akeno optical upper limits
  50. GRB 080701A: Early RAPTOR optical limits
  51. Swift Trigger 315630: Swift/UVOT Upper Limits
  52. GRB 080702A, Swift-BAT refined analysis
  53. GRB 080702A: Swift-XRT Team refined analysis
  54. Swift Trigger 315630: TLS R-band observation
  55. Swift Trigger 315630: Probably not a GRB
  56. GRB 080702: Swift detection of a short burst
  57. GRB 080701A: Swift/UVOT Upper Limits
  58. GRB 080701A: Early Super-LOTIS Observations
  59. GRB 080701A, Swift-BAT refined analysis
  60. Trigger 315630: Swift detection of a possible burst
  61. GRB 080701: Swift-XRT Prompt Analysis
  62. GRB 080701: Swift detection of a burst
  63. GRB 080623: Suzaku WAM observation of the prompt emission
  64. GRB 080625: Swift/UVOT Follow-Up Observations
  65. GRB 080625:Swift-XRT detection of the afterglow
  66. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  67. GRB080623: Swift UVOT followup observations
  68. GRB 080623, Swift-BAT refined analysis
  69. GRB 080623: TAROT La Silla observatory optical observations
  70. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  71. GRB 080623: Swift XRT prompt analysis
  72. GRB 080623: Swift detection of a burst
  73. Swift trigger 314975 is not a GRB
  74. Swift-BAT trigger 314975 possible burst
  75. GRB080613B: MITSuME upper limits
  76. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  77. Konus-Wind observation of GRB 080613B
  78. GRB 080613A: Swift-XRT detection of the afterglow
  79. GRB080613A: Swift/UVOT Upper Limits
  80. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  81. GRB 080613B: GROND Upper Limits
  82. GRB080613B: Swift/UVOT Upper Limits
  83. GRB 080613B, Swift-BAT refined analysis
  84. GRB 080613B: Swift-XRT refined analysis
  85. GRB 080613B: Swift detection of a burst
  86. GRB 080613: Faulkes Telescope North optical candidate
  87. Swift observations of BAT Slew Survey event (Trigger=010)
  88. Konus-Wind observation of GRB 080607
  89. GRB080607: RTT150 optical observations
  90. GRB 080607: Swift-XRT refined analysis
  91. Swift/UVOT Observations of GRB080607
  92. GRB 080607 KAIT observations
  93. Konus-Wind observation of GRB 080605
  94. GRB 080607, Swift-BAT refined analysis
  95. GRB 080605: GROND 2nd epoch observations
  96. GRB 080607: Keck/LRIS spectroscopy and redshift
  97. GRB 080607: Super-LOTIS early observations
  98. GRB 080607: Swift detection of a burst with optical afterglow
  99. GRB 080607: ROTSE-III Detection of Optical Counterpart
  100. GRB 080605: Swift-UVOT refined analysis

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