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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"

27577 results found.

  1. GRB 080906: GROND observations of the optical/NIR afterglow
  2. GRB 080905B: Refined UVOT Analysis
  3. GRB 080905B, Swift-BAT refined analysis
  4. GRB 080905A, Swift-BAT refined analysis
  5. GRB 080906: Swift detection of a burst with optical afterglow
  6. GRB 080905A: Swift-XRT Refined Analysis
  7. GRB080825C: Fermi-LAT observations
  8. GRB 080905B: Swift detection of a burst with possible optical counterpart
  9. GRB 080905: Swift detection of a probably-short burst
  10. GRB 080903: Swift/UVOT Observations
  11. GRB 080903: Swift-XRT Refined Analysis
  12. GRB 080903, Swift-BAT refined analysis
  13. GRB 080903: Astrotel-Caucasus optical observations
  14. GRB 080903: TAROT Calern observatory optical observations
  15. GRB 080903: ROTSE-III Optical Limits
  16. GRB 080903: Swift detection of a burst
  17. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  18. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  19. Swift-BAT trigger 322590 is not a GRB
  20. Swift trigger 322590: BAT detection of a possible burst
  21. SGR 0501+4516: XMM-Newton monitoring schedule
  22. SGR 0501+4516: Decline in Activity
  23. GRB080823: Fermi Gamma-ray Burst Monitor detection
  24. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  25. GRB080825C: GLAST Burst Monitor detection
  26. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  27. SGR 0501+4516: radio pulsar searches with GBT and WSRT
  28. GRB 080822B, Swift-BAT refined analysis
  29. SGR 0501+4516: Astrotel-Caucasus optical observations
  30. SGR 0501+4516: UKIRT detection of possible infra-red counterpart
  31. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  32. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  33. SGR 0501+4516: optical observations
  34. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  35. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  36. GRB 080822B: Swift detection of a burst
  37. GRB080818B: GLAST Burst Monitor detection
  38. Third event from SGR 0501+4516
  39. New Soft Gamma Repeater 0501+4516 was GRB 080822
  40. GRB 080822: Swift detection of a short burst
  41. GLAST Burst Monitor detection of a GRB: 080816B
  42. GLAST Burst Monitor detection of GRB 080818
  43. GLAST Burst Monitor detection of GRB080817B
  44. GLAST Burst Monitor detection of GRB 080817
  45. GLAST Burst Monitor detection of GRB080816
  46. GLAST Burst Monitor detection of GRB 080812
  47. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  48. GLAST Burst Monitor detection of GRB 080810
  49. GRB 080810: Swift/UVOT Refined Analysis
  50. GRB 080810: Kanazawa optical observation
  51. GRB 080810: Swift-XRT Team refined analysis
  52. GRB 080810: KANATA optical-NIR observation, update
  53. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  54. GRB 080810, Swift-BAT refined analysis
  55. GRB 080810: Swift detection of a burst with a bright optical afterglow
  56. GRB 080723B: XMM-Newton observation
  57. GRB 080805: Swift/UVOT Upper Limits
  58. GRB 080804: Swift/UVOT Refined Analysis
  59. GRB 080805, Swift-BAT refined analysis
  60. GRB 080804, Swift-BAT refined analysis
  61. GRB080805 optical limit by "Pi of the Sky"
  62. GRB 080805: Swift detection of a burst
  63. GRB 080804: Swift detection of a burst with optical afterglow
  64. GRB 080804: ROTSE-III Detection of Optical Counterpart
  65. GRB 080802: Swift/UVOT Upper Limits
  66. GRB 080802: UVI Telescope Upper Limit
  67. GRB 080802, Swift-BAT refined analysis
  68. GRB 080802: Swift detection of a probable burst
  69. GRB 080727C: Suzaku WAM observation of the prompt emission
  70. GRB 080727C: TAROT Calern observatory optical observations
  71. GRB 080727B: GROND redshift limit
  72. GRB 080727C, Swift-BAT refined analysis
  73. GRB 080727C: Swift/UVOT Upper Limits
  74. Konus-Wind observation of GRB 080727B
  75. GRB 080727C: Swift XRT refined analysis
  76. GRB080727C: RTT150 optical observations
  77. GRB 080727C: Swift detection of a burst
  78. Swift detection of XTE J1701-407
  79. GRB 080727B: Swift/UVOT Upper Limits
  80. BAT Trigger 318150 is not a GRB
  81. GRB 080727B: Swift-XRT refined analysis
  82. GRB 080727B, Swift-BAT refined analysis
  83. GRB 080727A, Swift-BAT refined analysis
  84. GRB 080727A: Swift-XRT refined analysis
  85. GRB080727A: Swift/UVOT Upper Limits
  86. GRB 080727B: Swift detection of a bright burst
  87. GRB 080727: Swift detection of a burst
  88. GRB 080725, Swift-BAT refined analysis
  89. GRB 080725: REM prompt observations
  90. GRB 080725: Swift detection of a burst
  91. GRB 080723A: Swift/UVOT Upper Limits
  92. GRB 080723B - Swift-XRT refined analysis
  93. GRB 080723B - Swift-XRT position
  94. GRB 080723, Swift-BAT refined analysis
  95. GRB 080723A: Swift-XRT refined analysis
  96. GRB 080723B: Detection and Localization by SuperAGILE
  97. GRB 080723: Swift detection of a burst
  98. GRB 080721: UVOT Follow-Up Observations
  99. Konus-Wind observation of GRB 080721
  100. GRB 080721: Swift-XRT refined analysis

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