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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"

26519 results found.

  1. GRB 080727B: Enhanced Swift-XRT position
  2. GRB 080727A: Enhanced Swift-XRT position
  3. GRB 080727B: Swift detection of a bright burst
  4. GRB 080727: Swift detection of a burst
  5. GRB 080726: GRB Localization by SuperAGILE
  6. GRB 080725, Swift-BAT refined analysis
  7. GRB 080723A: optical upper limit
  8. Konus-Wind observation of GRB 080723B
  9. GRB 080725: Swift detection of a burst
  10. ATCA radio upper limit on GRB 080723B
  11. VLA radio upper limit on GRB 080721
  12. GRB 080723B - Swift-XRT refined analysis
  13. GRB 080723, Swift-BAT refined analysis
  14. GRB 080723A: Swift-XRT refined analysis
  15. GRB 080723B: Detection and Localization by SuperAGILE
  16. GRB 080723B : a long GRB detected with INTEGRAL
  17. GRB 080723: Enhanced Swift-XRT position
  18. GRB 080723: Swift detection of a burst
  19. GRB 080721 : Lulin 2nd optical follow-ups
  20. GRB 080721: OA fading and redshift
  21. Konus-Wind observation of GRB 080721
  22. GRB 080721: Swift-XRT refined analysis
  23. GRB 080721: Enhanced Swift-XRT position
  24. GRB 080721, Swift-BAT refined analysis
  25. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  26. Retraction of Swift Trigger 317393
  27. Trigger 317393: Swift detection of a possible GRB
  28. GRB 080714: GROND confirmation of the optical/NIR afterglow
  29. Konus-Wind observation of GRB 080714
  30. GRB 080714: Swift-XRT refined analysis
  31. GRB 080714: Enhanced Swift-XRT position
  32. GRB 080714: Swift-BAT refined analysis
  33. GRB 080714: Swift detection of a burst
  34. GRB 080702A: optical upper limit
  35. GRB 080710: Optical observation with MITSuME Okayama
  36. GRB 080710: TLS observations, steepening afterglow decay
  37. GRB 080710, Swift-BAT refined analysis
  38. GRB 080710: Swift-XRT refined analysis
  39. GRB080710: Swift/UVOT observations
  40. GRB 080710: Enhanced Swift-XRT position
  41. GRB 080710: REM afterglow confirmation & brightening
  42. GRB 080710: Swift detection of a burst
  43. New Swift-XRT GRB products available online.
  44. GRB 080707, Swift-BAT refined analysis
  45. GRB 080707: Swift XRT refined analysis
  46. GRB 080707: Enhanced Swift-XRT position
  47. GRB 080707: VLT redshift
  48. GRB 080707: Swift detection of a burst
  49. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  50. Trigger 316063: Swift detection of a transient
  51. GRB 080703: GROND Upper Limits
  52. GRB 080702B: GROND Upper Limits
  53. GRB 080703: Swift-XRT refined analysis
  54. GRB 080703: VLT observations of the afterglow
  55. GRB 080703: Enhanced Swift-XRT position
  56. GRB 080703, Swift-BAT refined analysis
  57. GRB 080702B Swift-BAT refined analysis
  58. GRB 080703: Swift detection of a burst with optical afterglow
  59. No radio detection from the short GRB 080702A
  60. GRB 080625: Suzaku WAM observation of the prompt emission
  61. GRB 080702A, Swift-BAT refined analysis
  62. GRB 080702A: Swift-XRT Team refined analysis
  63. GRB 080702B : Burst detected in BAT during Swift slew
  64. GRB 080702A: Enhanced Swift-XRT position
  65. GRB 080702: Swift detection of a short burst
  66. GRB 080701: Swift-XRT refined analysis
  67. GRB 080701: Enhanced Swift-XRT position
  68. GRB 080701A, Swift-BAT refined analysis
  69. Trigger 315630: Swift detection of a possible burst
  70. GRB 080701: Swift detection of a burst
  71. GRB 080623: Suzaku WAM observation of the prompt emission
  72. GRB 080625: Further observations from OSN
  73. GRB 080625: Observations at OSN
  74. GRB 080625: Gamma Ray Burst Localization by SuperAGILE
  75. GRB 080623: GROND upper limits
  76. GRB 080623: Swift-XRT refined analysis
  77. GRB 080623, Swift-BAT refined analysis
  78. GRB 080623: Enhanced Swift-XRT position
  79. GRB 080623: TAROT La Silla observatory optical observations
  80. GRB 080623: Swift detection of a burst
  81. Swift trigger 314975 is not a GRB
  82. Swift-BAT trigger 314975 possible burst
  83. GRB 080603b: optical observation
  84. GRB 070809: Putative host galaxy and redshift
  85. VLA upper limit on INTEGRAL burst GRB 080613A
  86. GRB 0800603A: optical observation
  87. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  88. Konus-Wind observation of GRB 080613B
  89. GRB 080613A: Swift-XRT detection of the afterglow
  90. GRB080613A: Swift/UVOT Upper Limits
  91. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  92. GRB 080613B: GROND Upper Limits
  93. GRB 080613B, Swift-BAT refined analysis
  94. GRB 080613B: Swift-XRT refined analysis
  95. GRB 080613B: Swift detection of a burst
  96. GRB 080613 : a long GRB detected with INTEGRAL
  97. GRB 080603A: Late-time Keck imaging and spectroscopy
  98. GRB 080603B - TLS 2nd Epoch: Another Break
  99. GRB 080605: TLS 3rd Epoch - Source Confusion
  100. Konus-Wind observation of GRB 080607

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