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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"

39404 results found.

  1. GRB 120716A: Typo correction in GCN 13490
  2. GRB 120716A: Optical decay from NOT
  3. GRB 120716A: Candidate Optical Afterglow from PTF
  4. Konus-Wind observation of GRB 120716A
  5. IPN Triangulation of unusual GRB 120716A
  6. Fermi GBM trigger 120716.498 is not a GRB
  7. GRB 120711A: ATCA 34GHz final observations (upper limit)
  8. GRB 120714B: Swift/UVOT Detection
  9. GRB 120714B: Swift-XRT refined Analysis
  10. GRB120714A: Swift/UVOT upper limits
  11. GRB 120714B: Swift-BAT refined analysis
  12. GRB 120714A: GROND upper limits
  13. GRB 120714B: GROND confirmation of fading afterglow
  14. GRB 120714B: Redshift from VLT/X-shooter
  15. GRB 120714A: Swift-XRT refined Analysis
  16. GRB 120624B: VLA Observations
  17. GRB 120714B: Position Correction and Candidate Optical Afterglow
  18. GRB 120714A: Swift-BAT refined analysis
  19. GRB 120714B: Swift detection of a burst
  20. GRB 120714A: Enhanced Swift-XRT position
  21. GRB 120712A: Fermi GBM observation
  22. GRB 120711A: INTEGRAL/SPI observations
  23. GRB 120714A: Swift-XRT observations
  24. GRB120711B: MITSuME Ishigakijima upper limits
  25. GRB 120714A: Swift detection of a burst
  26. GRB 120711A: ATCA 34GHz further observations (upper limit)
  27. IPN Triangulation of GRB 120709A
  28. GRB 120712A: Swift/UVOT Detection
  29. GRB 120712A: VLT/Xshooter redshift
  30. GRB 120712A: Swift-XRT refined Analysis
  31. GRB 120712A Gemini-S redshift
  32. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  33. GRB 120712A: Enhanced Swift-XRT position
  34. GRB 120712A: Swift-BAT refined analysis
  35. GRB 120712A: Swift detection of a burst with optical afterglow
  36. GRB 120711B: Swift-XRT refined Analysis
  37. GRB 120711A: Fermi LAT Detection
  38. GRB 120711A: ATCA 34GHz upper limit
  39. GRB 120711B: Swift-BAT refined analysis
  40. GRB 120711B: Swift/UVOT Upper Limits
  41. GRB 120711A: Swift/UVOT Observations
  42. GRB 120709A: Swift/UVOT Observations
  43. Konus-Wind observation of GRB 120711A
  44. GRB 120711A: Fermi LAT detection
  45. GRB 120711A: MASTER early OT detection
  46. GRB 120711A: Swift-XRT observations
  47. GRB 120711A Gemini-S likely redshift
  48. Konus-Wind observation of GRB 120709A
  49. GRB 120711A: REM NIR early time detection
  50. GRB 120711A: GROND photometric redshift
  51. GRB 120711A: Fermi GBM observation
  52. GRB 120711A: MAXI/GSC detection
  53. GRB 120711A: a possible X-ray transient
  54. GRB 120711A: an bright long GRB detected with INTEGRAL
  55. Continued Skynet/PROMPT observations of GRB120711A
  56. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  57. Swift detection of GRB 120711B or a new Galactic transient
  58. GRB 120709A: Fermi GBM detection
  59. GRB 120709A: Swift-XRT observations
  60. GRB 120709A: Matched filter analysis of Fermi-LAT data
  61. GRB 120709A: optical afterglow limits
  62. Konus-Wind observation of GRB 120707A
  63. IPN Triangulation of GRB 120707A
  64. GRB 120709A: Fermi-LAT Detection
  65. GRB 120707A: Fermi GBM Detection of a Bright Burst
  66. GRB 120624B: mm detection at PdBI
  67. GRB 120703A: SMARTS optical/IR observations
  68. GRB 120703A: Swift/UVOT Detection
  69. GRB 120703A: Fermi GBM detection
  70. GRB 120703A: Swift-XRT refined Analysis
  71. GRB 120703A: Enhanced Swift-XRT position
  72. GRB 120703A: Swift-BAT refined analysis
  73. GRB 120624B Suzaku WAM observation of the prompt emission
  74. Konus-Wind observation of GRB 120703A
  75. GRB 120703A: NOT optical observation
  76. GRB 120701A: Swift/UVOT Detection
  77. GRB 120701A: GROND detection of the afterglow
  78. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  79. GRB 120701A: Swift-XRT afterglow detection and analysis
  80. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  81. GRB 120701A: Swift-BAT refined analysis
  82. GRB 120630A: NOT optical source within the XRT error circle
  83. Swift Trigger 525554 is probably not a GRB
  84. GRB120624B: Chandra observations and afterglow detection
  85. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  86. GRB 120624B Further Swift-XRT analysis
  87. GRB 120624B: Swift/UVOT Upper Limits
  88. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  89. GRB 120624B: Further analysis of the HAWKI observations
  90. GRB 120624B: Swift-XRT observations
  91. GRB 120624B: GROND upper limits
  92. GRB 120624B: NIR counterpart candidate from HAWKI
  93. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  94. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  95. Swift detection of Ginga 0834-430
  96. GRB 120624B: NOT optical upper limit
  97. Swift detection of IGR J17062-6143
  98. GRB 120624B: optical observations
  99. GRB 120624B, Swift-BAT refined analysis
  100. GRB 120624B: Fermi GBM fluence and peak photon flux correction

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