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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"

11620 results found.

  1. GRB 120811B: Fermi GBM observation
  2. GCN for GRB 120811C
  3. Improved IPN error box for short hard GRB 120811B
  4. IPN Triangulation of short hard GRB 120811B
  5. GRB 120807A: Fermi/LAT upper limit
  6. Fermi/GBM detection of an SGR-like burst
  7. GRB 120728A: Fermi GBM observation
  8. GRB 120729A: Fermi GBM observation
  9. GRB 120728B: Fermi GBM detection
  10. IPN Triangulation of GRB 120728B (long/intense)
  11. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  12. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  13. GRB 120716A: Fermi GBM observation
  14. IPN Triangulation of unusual GRB 120716A
  15. Fermi GBM trigger 120716.498 is not a GRB
  16. GRB 120624B: VLA Observations
  17. GRB 120712A: Fermi GBM observation
  18. IPN Triangulation of GRB 120709A
  19. GRB 120711A: Fermi LAT Detection
  20. Konus-Wind observation of GRB 120711A
  21. GRB 120711A: Fermi LAT detection
  22. GRB 120711A: MASTER early OT detection
  23. Konus-Wind observation of GRB 120709A
  24. GRB 120711A: GROND photometric redshift
  25. GRB 120711A: Fermi GBM observation
  26. GRB 120709A: Fermi GBM detection
  27. GRB 120709A: Swift-XRT observations
  28. GRB 120709A: Matched filter analysis of Fermi-LAT data
  29. Konus-Wind observation of GRB 120707A
  30. IPN Triangulation of GRB 120707A
  31. GRB 120709A: Fermi-LAT Detection
  32. GRB 120707A: Fermi GBM Detection of a Bright Burst
  33. GBM triggers 120705.153 & 120705.322 were not GRBs
  34. GRB 120703A: Fermi GBM detection
  35. GRB 120624B Suzaku WAM observation of the prompt emission
  36. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  37. GRB 120624B: GROND upper limits
  38. GRB 120624B: NIR counterpart candidate from HAWKI
  39. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  40. GRB 120624B: NOT optical upper limit
  41. GRB 120624B: optical observations
  42. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  43. Konus-Wind observation of GRB 120624B
  44. GRB 120624B: Swift detection of a burst
  45. GRB 120624A: Fermi GBM observation
  46. GRB 120624B: Fermi-LAT Detection
  47. GRB 120624B: Fermi GBM detection
  48. IPN Triangulation of GRB 120624A (short/intense)
  49. GBM triggers 120604.526 & 120604.399 were not GRBs
  50. IPN Triangulation of short GRB 120603A
  51. Fermi GBM trigger 120602.539 is not a GRB
  52. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  53. GRB 120521B: Fermi GBM observation
  54. IPN Triangulation of GRB 120519A (short/hard)
  55. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  56. Fermi GBM Trigger 358364818 is not a GRB
  57. Fermi Trigger 358364818: BOOTES-4 observations
  58. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  59. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  60. IPN Triangulation of GRB 120427A
  61. IPN Triangulation of bright GRB 120426A
  62. GRB 120402B: MASTER early OT limit
  63. GRB 120403B: Fermi GBM Observation
  64. GRB 120402B: Fermi GBM detection
  65. GRB 120328B: Fermi-LAT Observations
  66. GRB 120328B: Fermi GBM detection
  67. IPN Triangulation of GRB 120328B (long/intense)
  68. GRB 120326A: Fermi GBM Observation
  69. GRB 120323A: Fermi LAT observations
  70. Konus-Wind observation of GRB 120323A
  71. IPN Triangulation of GRB 120323A (short/very intense)
  72. GRB 120323A: Fermi GBM detection
  73. GRB 120316A : Suzaku WAM observation of the prompt emission
  74. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  75. Fermi GBM trigger 120319.237 is not a GRB
  76. Konus-Wind observation of GRB 120316A
  77. IPN Triangulation of GRB 120316A
  78. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  79. Fermi GBM triggers 120309.265 and 120309.402 are not GRBs
  80. Fermi GBM triggers 120305.186, 120305.802 and 120306.823 are not GRBs
  81. GRB 120302A: Fermi GBM Observation
  82. GRB 120302A found in ground analysis of BAT data
  83. Konus-Wind observation of GRB 120226A
  84. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  85. GRB 120226A: Fermi-LAT data analysis
  86. IPN Triangulation of GRB 120226A
  87. GRB 120227A: RAPTOR Limit During the Gamma-Ray Emitting Interval
  88. GRB 120226A: Fermi-LAT detection of a burst
  89. Fermi GBM detection of an SGR-like burst
  90. GRB 120212A: Fermi GBM observation
  91. IPN Triangulation of GRB 120129A (long/intense)
  92. Fermi GBM trigger 120123.169 is not a GRB
  93. GRB 120119A: Fermi GBM observation
  94. GRB 120114A found in ground analysis of BAT data
  95. GRB 120107A: Suzaku WAM observation of the prompt emission
  96. GRB 120107A: Fermi GBM observation
  97. Konus-Wind observation of GRB 120107A
  98. IPN Triangulation of GRB 120107A
  99. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  100. GRB 111222A: Fermi GBM observations

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