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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"

27604 results found.

  1. GRB 080506, Swift-BAT refined analysis
  2. GRB080503, RIMOTS optical upper limit
  3. GRB 080506: TLS afterglow detection in VRIZ
  4. GRB 080506: Optical observation with KANATA/TRISPEC
  5. GRB 080506: Swift detection of a burst with optical afterglow
  6. GRB 080503: Late-time Optical rebrightening (possible mini-SN)
  7. GRB 080503, Swift-BAT lag and time-resolved spectral analysis
  8. GRB 080503: MITSuME Ishigakijima optical upper limits
  9. GRB080503: Swift/UVOT Upper Limits
  10. GRB080503 XRT refined analysis
  11. GRB 080503, Swift-BAT refined analysis
  12. GRB 080503: MITSuME Akeno optical upper limits
  13. GRB 080503: Swift detection of a short burst
  14. GRB 080411: Continued Swift Monitoring
  15. GRB080430: Swift/UVOT observations
  16. GRB 080430, Swift-BAT refined analysis
  17. GRB 080430: Swift-XRT refined analysis
  18. GRB 080430 - SDSS Pre-Burst Observations
  19. GRB 080430: Swift detection of a burst with optical afterglow
  20. GRB 080430: TAROT Calern observatory optical observations
  21. GRB960202B - on the association with SN 1996cr
  22. GRB 080426: Swift-XRT refined analysis
  23. GRB080426: Swift/UVOT upper limits
  24. GRB 080426, Swift-BAT refined analysis
  25. GRB 080426: Swift detection of a possibly short burst
  26. Possible GRB 080315: XRT non-detection of afterglow
  27. GRB 080320 : Faulkes Telescope North Observations
  28. GRB 080319A : Liverpool and Faulkes Telescopes Observations
  29. GRB080319A: MAGIC telescope GeV observation
  30. Swift-BAT trigger 309665 is not a GRB
  31. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  32. GRB 080420?: Swift detection of a possible short burst
  33. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  34. GRB 080413B: Rapid PROMPT Observations
  35. Swift XRT and UVOT observations of GRB080414
  36. GRB 080413B: Faulkes Telescope South optical afterglow observations
  37. GRB 080413A: Liverpool Telescope and Faulkes Telescope South optical observations
  38. GRB 080413A: Suzaku WAM observation of the prompt emission
  39. GRB 080413B: Suzaku WAM observation of the prompt emission
  40. GRB 080414 Watcher observations
  41. GRB 080413B: Ep,i-Eiso correlation
  42. GRB080413B
  43. Swift-BAT spectral lag analysis of GRB 080413B
  44. GRB080413A: Swift/UVOT observations
  45. GRB 080413B, Swift-BAT refined analysis
  46. GRB 080413A, Swift-BAT refined analysis
  47. GRB 080413A Bootes observation
  48. GRB 080413B: GROND detection of afterglow in all bands
  49. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  50. GRB 080413: TAROT Calern observatory optical observations
  51. GRB 080413: Swift detection of a burst with an optical afterglow
  52. GRB 080413: ROTSE-III Detection of Optical Counterpart
  53. GRB 080411: Swift/UVOT refined analysis
  54. GRB 080411, Swift-BAT refined analysis
  55. GRB 080411: Swift-XRT Refined Analysis
  56. Konus-Wind observation of GRB 080411
  57. GRB 080411: VLT redshift
  58. GRB 080411: GROND detection of optical afterglow candidate
  59. GRB080330: MAGIC telescope GeV observation
  60. GRB 080411: Swift detection of a bright burst
  61. GRB 080409: Swift-BAT refined analysis
  62. GRB 080330 optical observations
  63. Swift/UVOT observations of GRB080409
  64. UVOT/Swift Observations of GRB080408
  65. GRB 080408: Swift-XRT position of a possible afterglow
  66. GRB 080409: Swift detection of a burst
  67. GRB 080319A: Early RAPTOR optical limits
  68. GRB 080330: RAPTOR detection of prompt optical flash
  69. GRB 080405: Swift-BAT refined analysis
  70. GRB 080405: Swift-XRT position
  71. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  72. GRB 080328: GAO 150cm telescope Optical Observation
  73. GRB 080330: Prompt PROMPT Observations
  74. GRB080330: optical observations
  75. GRB080328, RIMOTS optical upper limit
  76. GRB080330: Swift XRT refined analysis
  77. GRB 080330 Swift-UVOT refined analysis
  78. GRB 080328: Suzaku WAM observation of the prompt emission
  79. GRB 080330, Swift-BAT refined analysis
  80. Konus-Wind observation of GRB 080328
  81. GRB 080330: GROND Observations
  82. GRB 080330: TAROT Calern observatory optical observations
  83. GRB 080330A: PAIRITEL Infrared Detections
  84. GRB080330 - SDSS Pre-Burst Observations
  85. GRB 080330: Liverpool Telescope Optical observations
  86. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  87. GRB 080330: Swift detection of a burst with an optical counterpart
  88. GRB 080330: TAROT Calern observatory optical detection
  89. GRB 080328, Swift-BAT refined analysis
  90. GRB 080328: Swift XRT refined analysis
  91. GRB 080325, Swift-BAT refined analysis
  92. Swift/UVOT observations of GRB080328
  93. GRB080328: Faulkes Telescope North observations
  94. GRB 080328: Swift detection of a burst with an optical counterpart
  95. GRB 080325: Subaru detection of NIR afterglow candidate
  96. GRB 080325: MITSuME Akeno optical upper limits
  97. GRB080325: XRT Refined Analysis
  98. GRB 080325: GROND Observations
  99. GRB 080325: Swift/UVOT Upper Limits
  100. GRB 080325: NIR afterglow candidate

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