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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"

45729 results found.

  1. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  2. GRB 120624B: VLA Observations
  3. GRB 120714B: Position Correction and Candidate Optical Afterglow
  4. GRB 120714A: Swift-BAT refined analysis
  5. GRB 120714B: Swift detection of a burst
  6. GRB 120714A: Enhanced Swift-XRT position
  7. GRB 120712A: Fermi GBM observation
  8. GRB 120711A: INTEGRAL/SPI observations
  9. GRB120714A: UVOT non-detection
  10. GRB 120714A: Swift-XRT observations
  11. GRB120711B: MITSuME Ishigakijima upper limits
  12. GRB 120714A: Swift detection of a burst
  13. GRB 120711A: ATCA 34GHz further observations (upper limit)
  14. IPN Triangulation of GRB 120709A
  15. GRB 120712A: Swift/UVOT Detection
  16. GRB 120712A: VLT/Xshooter redshift
  17. GRB 120712A: Swift-XRT refined Analysis
  18. GRB 120712A Gemini-S redshift
  19. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  20. GRB 120712A: Enhanced Swift-XRT position
  21. GRB 120712A: Swift-BAT refined analysis
  22. GRB 120712A: Swift detection of a burst with optical afterglow
  23. GRB 120711B: Swift-XRT refined Analysis
  24. GRB 120711A: Fermi LAT Detection
  25. GRB 120711A: ATCA 34GHz upper limit
  26. GRB 120711B: Swift-BAT refined analysis
  27. GRB 120711B: Swift/UVOT Upper Limits
  28. GRB 120711A: Swift/UVOT Observations
  29. GRB 120709A: Swift/UVOT Observations
  30. Konus-Wind observation of GRB 120711A
  31. GRB 120711A: Fermi LAT detection
  32. GRB 120711A: MASTER early OT detection
  33. GRB 120711A: Swift-XRT observations
  34. GRB 120711A Gemini-S likely redshift
  35. Konus-Wind observation of GRB 120709A
  36. GRB 120711A: REM NIR early time detection
  37. GRB 120711A: GROND photometric redshift
  38. GRB 120711A: Fermi GBM observation
  39. GRB 120711A: MAXI/GSC detection
  40. GRB 120711A: a possible X-ray transient
  41. GRB 120711A: an bright long GRB detected with INTEGRAL
  42. Continued Skynet/PROMPT observations of GRB120711A
  43. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  44. Swift detection of GRB 120711B or a new Galactic transient
  45. Skynet/PROMPT Observations of GRB120711A
  46. GRB 120709A: Fermi GBM detection
  47. GRB 120709A: Swift-XRT observations
  48. GRB 120709A: Matched filter analysis of Fermi-LAT data
  49. GRB 120709A: optical afterglow limits
  50. Konus-Wind observation of GRB 120707A
  51. IPN Triangulation of GRB 120707A
  52. GRB 120709A: Fermi-LAT Detection
  53. GRB 120707A: Fermi GBM Detection of a Bright Burst
  54. GRB 120624B: mm detection at PdBI
  55. GRB 120703A: SMARTS optical/IR observations
  56. GBM triggers 120705.153 & 120705.322 were not GRBs
  57. GRB 120703A: Swift/UVOT Detection
  58. GRB 120703A: Fermi GBM detection
  59. GRB 120703A: Swift-XRT refined Analysis
  60. GRB 120703A: Enhanced Swift-XRT position
  61. GRB 120703A: Swift-BAT refined analysis
  62. GRB 120624B Suzaku WAM observation of the prompt emission
  63. Konus-Wind observation of GRB 120703A
  64. GRB 120703A: NOT optical observation
  65. GRB 120701A: Swift/UVOT Detection
  66. GRB 120701A: GROND detection of the afterglow
  67. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  68. Swift Trigger 525554 is noise
  69. GRB 120701A: Swift-XRT afterglow detection and analysis
  70. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  71. GRB 120701A: Swift-BAT refined analysis
  72. GRB 120630A: NOT optical source within the XRT error circle
  73. Swift Trigger 525554 is probably not a GRB
  74. GRB120624B: Chandra observations and afterglow detection
  75. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  76. GRB 120624B Further Swift-XRT analysis
  77. GRB 120624B: Swift/UVOT Upper Limits
  78. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  79. GRB 120624B: Further analysis of the HAWKI observations
  80. GRB 120624B: Swift-XRT observations
  81. GRB 120624B: GROND upper limits
  82. XRF 120626B: MAXI/GSC detection
  83. GRB 120624B: NIR counterpart candidate from HAWKI
  84. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  85. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  86. Swift detection of Ginga 0834-430
  87. GRB 120624B: NOT optical upper limit
  88. Swift detection of IGR J17062-6143
  89. GRB 120624B: optical observations
  90. GRB 120624B, Swift-BAT refined analysis
  91. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  92. Konus-Wind observation of GRB 120624B
  93. GRB 120624B: Swift detection of a burst
  94. GRB 120624A: Fermi GBM observation
  95. GRB 120624B: Fermi-LAT Detection
  96. Konus-Wind observation of GRB 120624A
  97. GRB 120624B: Fermi GBM detection
  98. IPN Triangulation of GRB 120624A (short/intense)
  99. Swift Trigger 524949: Noise fluctuation near a galaxy
  100. GRB 120622A: MAXI/GSC detection

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