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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"

19664 results found.

  1. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  2. SGR 0501+4516: radio pulsar searches with GBT and WSRT
  3. Konus-Wind observations of new SGR 0501+4516
  4. SGR 0501+4516: MDM Optical Observations
  5. GRB 080822B, Swift-BAT refined analysis
  6. SGR 0501+4516: WSRT Radio Observations
  7. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  8. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  9. SGR 0501+4516: optical observations
  10. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  11. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  12. Discovery of the Spin Period of the New Soft Gamma Repeater SGR 0501+4516
  13. GRB 080822B: Swift detection of a burst
  14. Third event from SGR 0501+4516
  15. New Soft Gamma Repeater 0501+4516 was GRB 080822
  16. GRB 080822: Swift detection of a short burst
  17. Radio detection of GRB 080810 with the VLA
  18. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  19. GLAST Burst Monitor detection of GRB 080810
  20. GRB 080810: Swift/UVOT Refined Analysis
  21. GRB 080810: D50 optical observation
  22. GRB 080810: Kanazawa optical observation
  23. GRB 080810: Swift-XRT Team refined analysis
  24. GRB 080810: Enhanced Swift-XRT position
  25. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  26. GRB 080810, Swift-BAT refined analysis
  27. GRB 080810: Swift detection of a burst with a bright optical afterglow
  28. GRB 080723B: XMM-Newton observation
  29. GRB 080727B: Late VLT imaging
  30. GRB 080805: Swift-XRT Refined Analysis
  31. GRB 080805: Swift/UVOT Upper Limits
  32. GRB 080804: Swift-XRT Refined Analysis
  33. GRB 080804: Swift/UVOT Refined Analysis
  34. GRB 080805, Swift-BAT refined analysis
  35. GRB 080804, Swift-BAT refined analysis
  36. GRB 080804: Enhanced Swift-XRT position
  37. GRB 080804: Faulkes Telescope South observations
  38. GRB080805 optical limit by "Pi of the Sky"
  39. GRB 080805: Swift detection of a burst
  40. GRB 080804: Swift detection of a burst with optical afterglow
  41. GRB 080804: ROTSE-III Detection of Optical Counterpart
  42. GRB 080802: Swift/UVOT Upper Limits
  43. GRB 080802: Swift-XRT Refined Analysis
  44. GRB 080802, Swift-BAT refined analysis
  45. GRB 080802: Swift detection of a probable burst
  46. GRB 080727C: Suzaku WAM observation of the prompt emission
  47. GRB 080727C: TAROT Calern observatory optical observations
  48. GRB 080727B: GROND redshift limit
  49. GRB 080727C, Swift-BAT refined analysis
  50. GRB 080727C: Swift/UVOT Upper Limits
  51. Konus-Wind observation of GRB 080727B
  52. GRB 080727C: Swift XRT refined analysis
  53. GRB 080727C: Enhanced Swift-XRT position
  54. GRB080727C: RTT150 optical observations
  55. GRB 080727C: Swift detection of a burst
  56. Swift detection of XTE J1701-407
  57. GRB 080727B: Swift/UVOT Upper Limits
  58. BAT Trigger 318150 is not a GRB
  59. GRB 080727B: Swift-XRT refined analysis
  60. GRB 080727B, Swift-BAT refined analysis
  61. GRB 080727A, Swift-BAT refined analysis
  62. GRB 080727A: Swift-XRT refined analysis
  63. GRB080727A: Swift/UVOT Upper Limits
  64. GRB 080727B: Enhanced Swift-XRT position
  65. GRB 080727A: Enhanced Swift-XRT position
  66. GRB 080727B: Swift detection of a bright burst
  67. GRB 080727: Swift detection of a burst
  68. GRB 080725, Swift-BAT refined analysis
  69. GRB 080723A: optical upper limit
  70. GRB080723B: Swift/UVOT Upper Limits
  71. GRB 080725: Swift detection of a burst
  72. GRB 080723A: Swift/UVOT Upper Limits
  73. GRB 080723B - correction to flux conversion factor
  74. GRB 080723B - Swift-XRT refined analysis
  75. GRB 080723B - Swift-XRT position
  76. GRB 080723, Swift-BAT refined analysis
  77. GRB 080723A: Swift-XRT refined analysis
  78. GRB 080723: Enhanced Swift-XRT position
  79. GRB 080723: Swift detection of a burst
  80. TNG/DOLORES redshift for GRB080721
  81. GRB 080721: UVOT Follow-Up Observations
  82. Konus-Wind observation of GRB 080721
  83. GRB 080721: Swift-XRT refined analysis
  84. GRB 080721: Enhanced Swift-XRT position
  85. GRB 080721, Swift-BAT refined analysis
  86. GRB 080721: Swift/UVOT Photometric Redshift
  87. GRB 080721: Swift-XRT correct position
  88. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  89. Retraction of Swift Trigger 317393
  90. Trigger 317393: Swift detection of a possible GRB
  91. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  92. GRB 080714: GROND confirmation of the optical/NIR afterglow
  93. Konus-Wind observation of GRB 080714
  94. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  95. GRB 080714: Swift-XRT refined analysis
  96. GRB 080714: Enhanced Swift-XRT position
  97. GRB 080714: Swift-BAT refined analysis
  98. GRB 080714: Swift detection of a burst
  99. GRB 080603B: optical observations in MAO
  100. GRB 080603B: optical observations in CrAO

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