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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"

11562 results found.

  1. GRB 121011A Suzaku WAM observation of the prompt emission
  2. GRB 121012A: Fermi GBM detection
  3. GRB 121011A: NOT redshift retraction
  4. GRB 121011A: Fermi GBM observation
  5. GRB 121011A: Fermi-LAT detection of a burst
  6. Further Swift-XRT observations of the GRB 120919A field.
  7. GRB 120921A: Fermi GBM detection of its 1000th GRB
  8. GRB 120916A Suzaku WAM observation of the prompt emission
  9. GRB 120922A: Fermi GBM detection
  10. GRB 120919B: MASTER prompt optical observations
  11. GRB 120919A: Swift-XRT observations
  12. IPN Triangulation of long GRB 120919B
  13. Konus-Wind observation of GRB 120919A
  14. IPN Triangulation of long GRB 120919A
  15. GRB 120919A: Fermi GBM detection
  16. GRB 120916A: Fermi GBM Observation
  17. Konus-Wind observation of GRB 120916A
  18. IPN Triangulation of long GRB 120916A
  19. GRB 120916A: Fermi-LAT detection of a burst
  20. Corrections to the Fermi-LAT upper limits for GRB 120807A, 120908A, 120909A, and 120911A
  21. GRB 120913B: Fermi GBM observation
  22. GRB 120913A: Fermi GBM observation
  23. Konus-Wind observation of GRB 120911B
  24. GRB 120911B: Fermi GBM observation
  25. GRB 120911B: Fermi-LAT detection of a burst
  26. GRB 120911A: Fermi GBM observation
  27. GRB 120911A: Fermi/LAT upper limit
  28. GRB 120908A and GRB 120909A : Fermi/LAT upper limit
  29. GRB 120908A: Fermi GBM detection
  30. GRB 120909A: Fermi GBM observation
  31. GRB 120907A: Fermi GBM detection
  32. GRB 120830A: Further Swift Observations
  33. GRB 120830A: Swift-XRT and UVOT observations
  34. GRB 120830A: Fermi GBM observation
  35. Konus-Wind observation of GRB 120830A
  36. GRB 120830A: early MASTER optical limit
  37. IPN Triangulation of short GRB 120830A
  38. GRB 120830A: Fermi-LAT detection of a short burst
  39. Fermi trigger 368003226 : MASTER optical observations
  40. Konus-Wind observation of GRB 120817B
  41. GRB 120817B: Fermi GBM detection
  42. IPN Triangulation of GRB 120817B (short/very intense)
  43. GRB 120811B: Fermi GBM observation
  44. GCN for GRB 120811C
  45. Improved IPN error box for short hard GRB 120811B
  46. IPN Triangulation of short hard GRB 120811B
  47. GRB 120807A: Fermi/LAT upper limit
  48. Fermi/GBM detection of an SGR-like burst
  49. GRB 120728A: Fermi GBM observation
  50. GRB 120729A: Fermi GBM observation
  51. GRB 120728B: Fermi GBM detection
  52. IPN Triangulation of GRB 120728B (long/intense)
  53. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  54. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  55. GRB 120716A: Fermi GBM observation
  56. IPN Triangulation of unusual GRB 120716A
  57. Fermi GBM trigger 120716.498 is not a GRB
  58. GRB 120624B: VLA Observations
  59. GRB 120712A: Fermi GBM observation
  60. IPN Triangulation of GRB 120709A
  61. GRB 120711A: Fermi LAT Detection
  62. Konus-Wind observation of GRB 120711A
  63. GRB 120711A: Fermi LAT detection
  64. GRB 120711A: MASTER early OT detection
  65. Konus-Wind observation of GRB 120709A
  66. GRB 120711A: GROND photometric redshift
  67. GRB 120711A: Fermi GBM observation
  68. GRB 120709A: Fermi GBM detection
  69. GRB 120709A: Swift-XRT observations
  70. GRB 120709A: Matched filter analysis of Fermi-LAT data
  71. Konus-Wind observation of GRB 120707A
  72. IPN Triangulation of GRB 120707A
  73. GRB 120709A: Fermi-LAT Detection
  74. GRB 120707A: Fermi GBM Detection of a Bright Burst
  75. GBM triggers 120705.153 & 120705.322 were not GRBs
  76. GRB 120703A: Fermi GBM detection
  77. GRB 120624B Suzaku WAM observation of the prompt emission
  78. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  79. GRB 120624B: GROND upper limits
  80. GRB 120624B: NIR counterpart candidate from HAWKI
  81. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  82. GRB 120624B: NOT optical upper limit
  83. GRB 120624B: optical observations
  84. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  85. Konus-Wind observation of GRB 120624B
  86. GRB 120624B: Swift detection of a burst
  87. GRB 120624A: Fermi GBM observation
  88. GRB 120624B: Fermi-LAT Detection
  89. GRB 120624B: Fermi GBM detection
  90. IPN Triangulation of GRB 120624A (short/intense)
  91. GBM triggers 120604.526 & 120604.399 were not GRBs
  92. IPN Triangulation of short GRB 120603A
  93. Fermi GBM trigger 120602.539 is not a GRB
  94. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  95. GRB 120521B: Fermi GBM observation
  96. IPN Triangulation of GRB 120519A (short/hard)
  97. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  98. Fermi GBM Trigger 358364818 is not a GRB
  99. Fermi Trigger 358364818: BOOTES-4 observations
  100. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate

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