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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"

27577 results found.

  1. GRB 080721, Swift-BAT refined analysis
  2. GRB 080721: Swift/UVOT Photometric Redshift
  3. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  4. Retraction of Swift Trigger 317393
  5. Trigger 317393: Swift detection of a possible GRB
  6. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  7. GRB 080714: GROND confirmation of the optical/NIR afterglow
  8. Konus-Wind observation of GRB 080714
  9. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  10. GRB 080714: Swift-XRT refined analysis
  11. GRB 080714: Swift-BAT refined analysis
  12. GRB 080714: Swift detection of a burst
  13. GRB 080710: Optical observation with MITSuME Okayama
  14. GRB 080710: TLS observations, steepening afterglow decay
  15. GRB 080710, Swift-BAT refined analysis
  16. GRB 080710: Rapid PROMPT Observations
  17. GRB 080710: Swift-XRT refined analysis
  18. GRB080710: Swift/UVOT observations
  19. UVOT white band observations of GRB080710
  20. GRB 080710: KAIT OA candidate
  21. GRB 080710: Swift XRT position
  22. GRB 080710: Swift detection of a burst
  23. GRB 080707: possible break in the X-rays
  24. GRB 080707: GROND Confirmation of the Optical Afterglow
  25. UVOT observations of GRB080707
  26. GRB 080707, Swift-BAT refined analysis
  27. GRB 080707: Swift XRT refined analysis
  28. GRB 080707: VLT redshift
  29. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  30. GRB 080707: Swift detection of a burst
  31. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  32. Trigger 316063: Swift detection of a transient
  33. GRB 080703: GROND Upper Limits
  34. GRB 080702B: GROND Upper Limits
  35. GRB 080703: Swift-XRT refined analysis
  36. GRB 080703: UVOT Follow-Up Observation
  37. GRB 080703, Swift-BAT refined analysis
  38. GRB 080702B Swift-BAT refined analysis
  39. GRB 080703: Swift detection of a burst with optical afterglow
  40. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  41. GRB 080702b: LCO optical observations
  42. Swift/UVOT observation of GRB080702A
  43. GRB 080702A: MITSuME Akeno optical upper limits
  44. GRB 080701A: Early RAPTOR optical limits
  45. Swift Trigger 315630: Swift/UVOT Upper Limits
  46. GRB 080702A, Swift-BAT refined analysis
  47. GRB 080702A: Swift-XRT Team refined analysis
  48. GRB 080702B : Burst detected in BAT during Swift slew
  49. Swift Trigger 315630: TLS R-band observation
  50. Swift Trigger 315630: Probably not a GRB
  51. GRB 080702: Swift detection of a short burst
  52. GRB 080701A: Swift/UVOT Upper Limits
  53. GRB 080701A: Early Super-LOTIS Observations
  54. GRB 080701A, Swift-BAT refined analysis
  55. Trigger 315630: Swift detection of a possible burst
  56. GRB 080701: Swift-XRT Prompt Analysis
  57. GRB 080701: Swift detection of a burst
  58. GRB 080623: Suzaku WAM observation of the prompt emission
  59. GRB 080625: Swift/UVOT Follow-Up Observations
  60. GRB 080625:Swift-XRT detection of the afterglow
  61. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  62. GRB 080623: GROND upper limits
  63. GRB080623: Swift UVOT followup observations
  64. GRB 080623, Swift-BAT refined analysis
  65. GRB 080623: TAROT La Silla observatory optical observations
  66. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  67. GRB 080623: Swift XRT prompt analysis
  68. GRB 080623: Swift detection of a burst
  69. Swift trigger 314975 is not a GRB
  70. Swift-BAT trigger 314975 possible burst
  71. GRB080613B: MITSuME upper limits
  72. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  73. Konus-Wind observation of GRB 080613B
  74. GRB 080613A: Swift-XRT detection of the afterglow
  75. GRB080613A: Swift/UVOT Upper Limits
  76. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  77. GRB 080613B: GROND Upper Limits
  78. GRB080613B: Swift/UVOT Upper Limits
  79. GRB 080613B, Swift-BAT refined analysis
  80. GRB 080613B: Swift-XRT refined analysis
  81. GRB 080613B: Swift detection of a burst
  82. GRB 080613: Faulkes Telescope North optical candidate
  83. Swift observations of BAT Slew Survey event (Trigger=010)
  84. Konus-Wind observation of GRB 080607
  85. GRB080607: RTT150 optical observations
  86. GRB 080607: Swift-XRT refined analysis
  87. Swift/UVOT Observations of GRB080607
  88. GRB 080607 KAIT observations
  89. Konus-Wind observation of GRB 080605
  90. GRB 080607, Swift-BAT refined analysis
  91. GRB 080605: GROND 2nd epoch observations
  92. GRB 080607: Keck/LRIS spectroscopy and redshift
  93. GRB 080607: Super-LOTIS early observations
  94. GRB 080607: Swift detection of a burst with optical afterglow
  95. GRB 080607: ROTSE-III Detection of Optical Counterpart
  96. GRB 080605: Swift-UVOT refined analysis
  97. GRB 080605, Swift-BAT refined analysis
  98. GRB 080605, Swift-BAT refined analysis
  99. GRB 080605: Swift-XRT refined analysis
  100. GRB080605: observation by BOOTES

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