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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"

29107 results found.

  1. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  2. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  3. GRB 080905A: MITSuME Akeno optical upper limits
  4. Swift Trigger 324122 is again known source Swift J1842.5-1124
  5. Swift Trigger 324116 is known source again
  6. Swift Trigger 324112 is known source Swift J1842.5-1124
  7. GRB 080906: Refined Swift/UVOT Observations
  8. GRB 080906: Swift-XRT Refined Analysis
  9. GRB 080906, Swift-BAT refined analysis
  10. GRB 080906: GROND observations of the optical/NIR afterglow
  11. GRB 080905B: Refined UVOT Analysis
  12. GRB 080905B, Swift-BAT refined analysis
  13. GRB 080905A, Swift-BAT refined analysis
  14. GRB 080906: Swift detection of a burst with optical afterglow
  15. GRB 080825C: Fermi GBM Spectral Analysis
  16. GRB080825C: Fermi-LAT observations
  17. GRB 080905B: Swift detection of a burst with possible optical counterpart
  18. GRB 080905: Swift detection of a probably-short burst
  19. GRB 080903: Swift/UVOT Observations
  20. GRB 080903: Swift-XRT Refined Analysis
  21. GRB 080903, Swift-BAT refined analysis
  22. GRB 080903: Astrotel-Caucasus optical observations
  23. GRB 080903: TAROT Calern observatory optical observations
  24. GRB 080903: ROTSE-III Optical Limits
  25. GRB 080903: Swift detection of a burst
  26. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  27. Swift-BAT trigger 322590 is not a GRB
  28. Swift trigger 322590: BAT detection of a possible burst
  29. SGR 0501+4516: XMM-Newton monitoring schedule
  30. SGR 0501+4516: Decline in Activity
  31. GRB080823: Fermi Gamma-ray Burst Monitor detection
  32. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  33. GRB080825C: GLAST Burst Monitor detection
  34. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  35. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  36. GRB 080822B, Swift-BAT refined analysis
  37. SGR 0501+4516: UKIRT detection of possible infra-red counterpart
  38. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  39. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  40. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  41. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  42. GRB 080822B: Swift detection of a burst
  43. GRB080818B: GLAST Burst Monitor detection
  44. Third event from SGR 0501+4516
  45. New Soft Gamma Repeater 0501+4516 was GRB 080822
  46. GRB 080822: Swift detection of a short burst
  47. GLAST Burst Monitor detection of a GRB: 080816B
  48. GLAST Burst Monitor detection of GRB 080818
  49. GLAST Burst Monitor detection of GRB080817B
  50. GLAST Burst Monitor detection of GRB 080817
  51. GLAST Burst Monitor detection of GRB080816
  52. GLAST Burst Monitor detection of GRB 080812
  53. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  54. GLAST Burst Monitor detection of GRB 080810
  55. GRB 080810: Swift/UVOT Refined Analysis
  56. GRB 080810: Kanazawa optical observation
  57. GRB 080810: Swift-XRT Team refined analysis
  58. GRB 080810: KANATA optical-NIR observation, update
  59. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  60. GRB 080810, Swift-BAT refined analysis
  61. GRB 080810: Swift detection of a burst with a bright optical afterglow
  62. GRB 080723B: XMM-Newton observation
  63. GRB 080805: Swift/UVOT Upper Limits
  64. GRB 080804: Swift/UVOT Refined Analysis
  65. GRB 080805, Swift-BAT refined analysis
  66. GRB 080804, Swift-BAT refined analysis
  67. GRB080805 optical limit by "Pi of the Sky"
  68. GRB 080805: Swift detection of a burst
  69. GRB 080804: Swift detection of a burst with optical afterglow
  70. GRB 080804: ROTSE-III Detection of Optical Counterpart
  71. GRB 080802: Swift/UVOT Upper Limits
  72. GRB 080802: UVI Telescope Upper Limit
  73. GRB 080802, Swift-BAT refined analysis
  74. GRB 080802: Swift detection of a probable burst
  75. GRB 080727C: Suzaku WAM observation of the prompt emission
  76. GRB 080727C: TAROT Calern observatory optical observations
  77. GRB 080727B: GROND redshift limit
  78. GRB 080727C, Swift-BAT refined analysis
  79. GRB 080727C: Swift/UVOT Upper Limits
  80. Konus-Wind observation of GRB 080727B
  81. GRB 080727C: Swift XRT refined analysis
  82. GRB080727C: RTT150 optical observations
  83. GRB 080727C: Swift detection of a burst
  84. Swift detection of XTE J1701-407
  85. GRB 080727B: Swift/UVOT Upper Limits
  86. BAT Trigger 318150 is not a GRB
  87. GRB 080727B: Swift-XRT refined analysis
  88. GRB 080727B, Swift-BAT refined analysis
  89. GRB 080727A, Swift-BAT refined analysis
  90. GRB 080727A: Swift-XRT refined analysis
  91. GRB080727A: Swift/UVOT Upper Limits
  92. GRB 080727B: Swift detection of a bright burst
  93. GRB 080727: Swift detection of a burst
  94. GRB 080725, Swift-BAT refined analysis
  95. GRB 080725: REM prompt observations
  96. GRB 080725: Swift detection of a burst
  97. GRB 080723A: Swift/UVOT Upper Limits
  98. GRB 080723B - Swift-XRT refined analysis
  99. GRB 080723B - Swift-XRT position
  100. GRB 080723, Swift-BAT refined analysis

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