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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"

26517 results found.

  1. GRB 080727B: Swift detection of a bright burst
  2. GRB 080727: Swift detection of a burst
  3. GRB 080726: GRB Localization by SuperAGILE
  4. GRB 080725, Swift-BAT refined analysis
  5. GRB 080723A: optical upper limit
  6. Konus-Wind observation of GRB 080723B
  7. GRB 080725: Swift detection of a burst
  8. ATCA radio upper limit on GRB 080723B
  9. VLA radio upper limit on GRB 080721
  10. GRB 080723B - Swift-XRT refined analysis
  11. GRB 080723, Swift-BAT refined analysis
  12. GRB 080723A: Swift-XRT refined analysis
  13. GRB 080723B: Detection and Localization by SuperAGILE
  14. GRB 080723B : a long GRB detected with INTEGRAL
  15. GRB 080723: Enhanced Swift-XRT position
  16. GRB 080723: Swift detection of a burst
  17. GRB 080721 : Lulin 2nd optical follow-ups
  18. GRB 080721: OA fading and redshift
  19. Konus-Wind observation of GRB 080721
  20. GRB 080721: Swift-XRT refined analysis
  21. GRB 080721: Enhanced Swift-XRT position
  22. GRB 080721, Swift-BAT refined analysis
  23. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  24. Retraction of Swift Trigger 317393
  25. Trigger 317393: Swift detection of a possible GRB
  26. GRB 080714: GROND confirmation of the optical/NIR afterglow
  27. Konus-Wind observation of GRB 080714
  28. GRB 080714: Swift-XRT refined analysis
  29. GRB 080714: Enhanced Swift-XRT position
  30. GRB 080714: Swift-BAT refined analysis
  31. GRB 080714: Swift detection of a burst
  32. GRB 080702A: optical upper limit
  33. GRB 080710: Optical observation with MITSuME Okayama
  34. GRB 080710: TLS observations, steepening afterglow decay
  35. GRB 080710, Swift-BAT refined analysis
  36. GRB 080710: Swift-XRT refined analysis
  37. GRB080710: Swift/UVOT observations
  38. GRB 080710: Enhanced Swift-XRT position
  39. GRB 080710: REM afterglow confirmation & brightening
  40. GRB 080710: Swift detection of a burst
  41. New Swift-XRT GRB products available online.
  42. GRB 080707, Swift-BAT refined analysis
  43. GRB 080707: Swift XRT refined analysis
  44. GRB 080707: Enhanced Swift-XRT position
  45. GRB 080707: VLT redshift
  46. GRB 080707: Swift detection of a burst
  47. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  48. Trigger 316063: Swift detection of a transient
  49. GRB 080703: GROND Upper Limits
  50. GRB 080702B: GROND Upper Limits
  51. GRB 080703: Swift-XRT refined analysis
  52. GRB 080703: VLT observations of the afterglow
  53. GRB 080703: Enhanced Swift-XRT position
  54. GRB 080703, Swift-BAT refined analysis
  55. GRB 080702B Swift-BAT refined analysis
  56. GRB 080703: Swift detection of a burst with optical afterglow
  57. No radio detection from the short GRB 080702A
  58. GRB 080625: Suzaku WAM observation of the prompt emission
  59. GRB 080702A, Swift-BAT refined analysis
  60. GRB 080702A: Swift-XRT Team refined analysis
  61. GRB 080702B : Burst detected in BAT during Swift slew
  62. GRB 080702A: Enhanced Swift-XRT position
  63. GRB 080702: Swift detection of a short burst
  64. GRB 080701: Swift-XRT refined analysis
  65. GRB 080701: Enhanced Swift-XRT position
  66. GRB 080701A, Swift-BAT refined analysis
  67. Trigger 315630: Swift detection of a possible burst
  68. GRB 080701: Swift detection of a burst
  69. GRB 080623: Suzaku WAM observation of the prompt emission
  70. GRB 080625: Further observations from OSN
  71. GRB 080625: Observations at OSN
  72. GRB 080625: Gamma Ray Burst Localization by SuperAGILE
  73. GRB 080623: GROND upper limits
  74. GRB 080623: Swift-XRT refined analysis
  75. GRB 080623, Swift-BAT refined analysis
  76. GRB 080623: Enhanced Swift-XRT position
  77. GRB 080623: TAROT La Silla observatory optical observations
  78. GRB 080623: Swift detection of a burst
  79. Swift trigger 314975 is not a GRB
  80. Swift-BAT trigger 314975 possible burst
  81. GRB 080603b: optical observation
  82. GRB 070809: Putative host galaxy and redshift
  83. VLA upper limit on INTEGRAL burst GRB 080613A
  84. GRB 0800603A: optical observation
  85. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  86. Konus-Wind observation of GRB 080613B
  87. GRB 080613A: Swift-XRT detection of the afterglow
  88. GRB080613A: Swift/UVOT Upper Limits
  89. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  90. GRB 080613B: GROND Upper Limits
  91. GRB 080613B, Swift-BAT refined analysis
  92. GRB 080613B: Swift-XRT refined analysis
  93. GRB 080613B: Swift detection of a burst
  94. GRB 080613 : a long GRB detected with INTEGRAL
  95. GRB 080603A: Late-time Keck imaging and spectroscopy
  96. GRB 080603B - TLS 2nd Epoch: Another Break
  97. GRB 080605: TLS 3rd Epoch - Source Confusion
  98. Konus-Wind observation of GRB 080607
  99. GRB080607: RTT150 optical observations
  100. GRB 080603A: optical observations

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