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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"

26489 results found.

  1. Swift Trigger 524642 is Swift J1910.2-0546
  2. Konus-Wind observation of GRB 120602A
  3. IPN Triangulation of GRB 120602A (long/very bright)
  4. GRB 120612A: Swift-XRT refined Analysis
  5. GRB 120612A: Swift-BAT refined analysis
  6. GRB 120612A: Enhanced Swift-XRT position
  7. GRB 120612A: BOOTES-3 optical upper limit
  8. GRB 120612A: Swift detection of a burst
  9. GRB 120603A: Suzaku WAM observation of the prompt emission
  10. GBM triggers 120604.526 & 120604.399 were not GRBs
  11. Konus-Wind observation of GRB 120603A
  12. IPN Triangulation of short GRB 120603A
  13. Konus-Wind observation of GRB 120528B
  14. GRB 120519A: Suzaku WAM observation of the prompt emission
  15. GRB 120521C redshift estimate
  16. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  17. GRB 120512A: Suzaku WAM observation of the prompt emission
  18. GRB 120521C: EVLA Localization of Afterglow
  19. Konus-Wind observation of GRB 120522A
  20. IPN triangulation of GRB 120522A (long/intense)
  21. GRB 120521B: Fermi GBM observation
  22. GRB 120521A: ATCA 34GHz upper limit
  23. GRB 120521C: Early Tautenburg limits
  24. GRB 120521A: GROND Upper limits
  25. GRB 120521C: Swift-XRT refined Analysis
  26. GRB 120521C: Swift-BAT refined analysis
  27. GRB 120521B: GROND Upper limits
  28. GRB 120521A: Swift-XRT refined Analysis
  29. GRB 120521C: Enhanced Swift-XRT position
  30. GRB 120521C: TAROT Calern observatory optical observations
  31. GRB 120521C: Swift detection of a burst
  32. GRB 120521B: Swift-BAT refined analysis
  33. GRB 120521B: Swift-XRT refined Analysis
  34. Konus-Wind observation of GRB 120519A
  35. Swift starts a new program to find fainter transients
  36. IPN Triangulation of GRB 120519A (short/hard)
  37. GRB 120521B: Enhanced Swift-XRT position
  38. GRB 120521A: Swift-BAT refined analysis
  39. GRB 120521B: TAROT La Silla observatory optical observations
  40. GRB 120521B: Swift detection of a burst
  41. GRB 120521A: Enhanced Swift-XRT position
  42. GRB 120521A: TAROT La Silla observatory optical observations
  43. GRB 120514A : Suzaku WAM observation of the prompt emission
  44. GRB 120512A: A long GRB detected by INTEGRAL
  45. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  46. Konus-Wind observation of GRB 120510A
  47. GRB 120514A: Swift-XRT refined Analysis
  48. GRB 120514A: Enhanced Swift-XRT position
  49. GRB 120514A: Swift-BAT refined analysis
  50. GRB 120514A: TAROT Calern observatory optical observations
  51. GRB 120514A: Swift detection of a burst
  52. Fermi GBM Trigger 358364818 is not a GRB
  53. GRB 120510A: Swift XRT and UVOT observations
  54. GRB 120510A: MAXI/GSC detection of a burst
  55. GRB 120422A: SN identification from GTC
  56. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  57. GRB 120422A: P200 NIR detection
  58. GRB 120422A: Gemini-N detection of a supernova
  59. GRB 120422A: i-band re-brightening and possible SN detection
  60. GRB 120422A: optical observations
  61. Konus-Wind observation of GRB 120427A
  62. IPN Triangulation of GRB 120427A
  63. Konus-Wind observation of GRB 120426A
  64. GRB 120422A: Additional Gemini observations and Keck/LRIS spectroscopy
  65. IPN Triangulation of bright GRB 120426A
  66. Swift Trigger 520928 is probably not a burst
  67. GRB 120422A: VLT/X-shooter spectroscopy of the GRB counterpart
  68. GRB 120422A GROND observations
  69. GRB 120422A: Gemini redshift of candidate host
  70. GRB 120422A: Zadko observatory - Gingin optical observations
  71. GRB 120422A: Swift-XRT refined Analysis
  72. GRB 120422A: Enhanced Swift-XRT position
  73. GRB 120422A: Swift-BAT refined analysis
  74. GRB 120422A: Swift detection of a burst
  75. GRB 120419A: A long GRB detected by INTEGRAL
  76. SGR1806-20, Swift-BAT refined analysis (Trigger 519868)
  77. Swift Trigger 519874 is probably a noise event
  78. GRB 120404A: optical observations
  79. GRB120404A: GROND observations show steeply decaying afterglow
  80. GRB120404A: MOA optical observations of the initial rise afterglow
  81. GRB 120404A: VLT/X-shooter redshift confirmation
  82. GRB 120404A: Swift/UVOT Detection
  83. GRB 120403B: Swift-XRT refined Analysis
  84. GRB 120404A: Swift-XRT refined Analysis
  85. GRB 120404A : TNT optical observation
  86. GRB 120404A: Swift-BAT refined analysis
  87. GRB 120401A: GROND Detection of an optical/NIR afterglow candidate
  88. GRB 120404A: Enhanced Swift-XRT position
  89. GRB 120404A: Gemini-N Redshift correction
  90. GRB 120403B: TAROT La Silla observatory optical observations
  91. GRB 120403B: Fermi GBM Observation
  92. GRB 120404A: Faulkes Telescope North afterglow confirmation
  93. GRB 120404A: Swift detection of a burst with an optical counterpart
  94. GRB 120403B: Swift-BAT refined analysis
  95. GRB 120403B: Enhanced Swift-XRT position
  96. GRB 120403B: Swift detection of a burst
  97. GRB 120403A, Swift-BAT refined analysis
  98. GRB 120402B: Fermi GBM detection
  99. GRB 120326A: Bassano Bresciano Observatory - correction for GCN Cir 13178
  100. GRB 120403A: Swift detection of a burst

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