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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"

28239 results found.

  1. GRB 120612A: Swift-XRT refined Analysis
  2. GRB 120612A: Swift-BAT refined analysis
  3. GRB 120612A: Enhanced Swift-XRT position
  4. GRB 120612A: BOOTES-3 optical upper limit
  5. GRB 120612A: Swift detection of a burst
  6. GRB 120603A: Suzaku WAM observation of the prompt emission
  7. Konus-Wind observation of GRB 120603A
  8. Konus-Wind observation of GRB 120528B
  9. GRB 120519A: Suzaku WAM observation of the prompt emission
  10. GRB 120528B: MAXI/GSC detection
  11. GRB 120512A: Suzaku WAM observation of the prompt emission
  12. GRB120521B: SSO 2.3m upper limits
  13. GRB 120521B: Fermi GBM observation
  14. GRB 120521C: Early Tautenburg limits
  15. GRB 120521A: GROND Upper limits
  16. GRB 120521C: Swift-XRT refined Analysis
  17. GRB 120521C: Swift-BAT refined analysis
  18. GRB 120521C: Keck Observations
  19. GRB 120521C: Swift/UVOT Upper Limits
  20. GRB 120521B: Swift/UVOT Upper Limits
  21. GRB 120521B: GROND Upper limits
  22. GRB 120521A: Swift-XRT refined Analysis
  23. GRB 120521C: PAIRITEL NIR Upper Limits
  24. GRB 120521C: Enhanced Swift-XRT position
  25. GRB 120521C: BOOTES-1 optical observations
  26. GRB 120521C - NOT optical limits
  27. GRB 120521C: TAROT Calern observatory optical observations
  28. GRB 120521C: Swift detection of a burst
  29. GRB 120521B: Swift-BAT refined analysis
  30. GRB 120521B: Swift-XRT refined Analysis
  31. Swift starts a new program to find fainter transients
  32. IPN Triangulation of GRB 120519A (short/hard)
  33. GRB 120521A: Swift/UVOT Upper Limits
  34. GRB 120521B: Enhanced Swift-XRT position
  35. GRB 120521A: Swift-BAT refined analysis
  36. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  37. GRB 120521B: TAROT La Silla observatory optical observations
  38. GRB 120521B: Swift detection of a burst
  39. GRB 120521A: Enhanced Swift-XRT position
  40. GRB 120521A: TAROT La Silla observatory optical observations
  41. GRB 120521A: Swift detection of a short burst
  42. GRB 120514A : Suzaku WAM observation of the prompt emission
  43. GRB 120512A: A long GRB detected by INTEGRAL
  44. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  45. GRB 120514A: GROND upper limits
  46. GRB 120514A: Swift/UVOT Upper Limits
  47. GRB 120514A: UKIRT IR observations
  48. Konus-Wind observation of GRB 120510A
  49. GRB 120514A: Swift-XRT refined Analysis
  50. GRB 120514A: APEX observations of the submm counterpart
  51. GRB 120514A: Enhanced Swift-XRT position
  52. GRB 120514A: Swift-BAT refined analysis
  53. GRB 120514A: TAROT Calern observatory optical observations
  54. GRB 120514A: Swift detection of a burst
  55. GRB 120422A: Konkoly optical observations
  56. Fermi Trigger 358364818: BOOTES-4 observations
  57. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  58. GRB 120510A: Swift XRT and UVOT observations
  59. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  60. GRB 120422A: P200 NIR detection
  61. GRB 120422A: Gemini-N detection of a supernova
  62. GRB 120422A: optical observations
  63. Konus-Wind observation of GRB 120427A
  64. Swift detection of 4U 1630-47
  65. GRB 120422A, the review of the sky area in plate archives
  66. Konus-Wind observation of GRB 120426A
  67. GRB 120422A: Additional Gemini observations and Keck/LRIS spectroscopy
  68. IPN Triangulation of bright GRB 120426A
  69. GRB 120422A: MITSuME Ishigakijima upper limit
  70. Swift Trigger 520928 is probably not a burst
  71. GRB 120422A: 272 GHz observations from SMA
  72. GRB 120422A: RAPTOR Limits During Gamma-ray Emitting Interval
  73. GRB 120422A GROND observations
  74. GRB 120422A: Super-LOTIS early observations
  75. GRB 120422A: NOT optical observations
  76. GRB 120422A: Zadko observatory - Gingin optical observations
  77. GRB 120422A: Swift-XRT refined Analysis
  78. GRB 120422A: A Swift/UVOT Detection
  79. GRB 120422A: Enhanced Swift-XRT position
  80. GRB 120422A: Swift-BAT refined analysis
  81. GRB 120422A: Gemini observations
  82. GRB 120422A: Faulkes Telescope North observations
  83. GRB 120422A: Swift detection of a burst
  84. GRB 120419A: Swift-XRT and UVOT observations
  85. GRB 120419A: A long GRB detected by INTEGRAL
  86. SGR1806-20, Swift-BAT refined analysis (Trigger 519868)
  87. Swift Trigger 519874 is probably a noise event
  88. Trigger 519868: Swift detection of SGR1806-20
  89. GRB 120404A: optical observations in Mondy observatory
  90. GRB 120404A: optical observations
  91. GRB 120404A, Optical Observations
  92. GRB 120404A: MASTER OT observations
  93. GRB120404A: GROND observations show steeply decaying afterglow
  94. GRB120404A: MOA optical observations of the initial rise afterglow
  95. GRB 120404A: VLT/X-shooter redshift confirmation
  96. GRB 120404A: Swift/UVOT Detection
  97. GRB 120404A: MITSuME Ishigakijima Optical Observation
  98. GRB 120404A: MITSuME Okayama Optical Observation
  99. GRB 120403B: Swift-XRT refined Analysis
  100. GRB 120404A: Swift-XRT refined Analysis

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