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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"

27603 results found.

  1. GRB 080727C: Swift XRT refined analysis
  2. GRB080727C: RTT150 optical observations
  3. GRB 080727C: Swift detection of a burst
  4. Swift detection of XTE J1701-407
  5. GRB 080727B: Swift/UVOT Upper Limits
  6. BAT Trigger 318150 is not a GRB
  7. GRB 080727B: Swift-XRT refined analysis
  8. GRB 080727B, Swift-BAT refined analysis
  9. GRB 080727A, Swift-BAT refined analysis
  10. GRB 080727A: Swift-XRT refined analysis
  11. GRB080727A: Swift/UVOT Upper Limits
  12. GRB 080727B: Swift detection of a bright burst
  13. GRB 080727: Swift detection of a burst
  14. GRB 080725, Swift-BAT refined analysis
  15. GRB 080725: REM prompt observations
  16. GRB 080725: Swift detection of a burst
  17. GRB 080723A: Swift/UVOT Upper Limits
  18. GRB 080723B - Swift-XRT refined analysis
  19. GRB 080723B - Swift-XRT position
  20. GRB 080723, Swift-BAT refined analysis
  21. GRB 080723A: Swift-XRT refined analysis
  22. GRB 080723B: Detection and Localization by SuperAGILE
  23. GRB 080723: Swift detection of a burst
  24. GRB 080721: UVOT Follow-Up Observations
  25. Konus-Wind observation of GRB 080721
  26. GRB 080721: Swift-XRT refined analysis
  27. GRB 080721, Swift-BAT refined analysis
  28. GRB 080721: Swift/UVOT Photometric Redshift
  29. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  30. Retraction of Swift Trigger 317393
  31. Trigger 317393: Swift detection of a possible GRB
  32. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  33. GRB 080714: GROND confirmation of the optical/NIR afterglow
  34. Konus-Wind observation of GRB 080714
  35. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  36. GRB 080714: Swift-XRT refined analysis
  37. GRB 080714: Swift-BAT refined analysis
  38. GRB 080714: Swift detection of a burst
  39. GRB 080710: Optical observation with MITSuME Okayama
  40. GRB 080710: TLS observations, steepening afterglow decay
  41. GRB 080710, Swift-BAT refined analysis
  42. GRB 080710: Rapid PROMPT Observations
  43. GRB 080710: Swift-XRT refined analysis
  44. GRB080710: Swift/UVOT observations
  45. UVOT white band observations of GRB080710
  46. GRB 080710: KAIT OA candidate
  47. GRB 080710: Swift XRT position
  48. GRB 080710: Swift detection of a burst
  49. GRB 080707: possible break in the X-rays
  50. GRB 080707: GROND Confirmation of the Optical Afterglow
  51. UVOT observations of GRB080707
  52. GRB 080707, Swift-BAT refined analysis
  53. GRB 080707: Swift XRT refined analysis
  54. GRB 080707: VLT redshift
  55. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  56. GRB 080707: Swift detection of a burst
  57. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  58. Trigger 316063: Swift detection of a transient
  59. GRB 080703: GROND Upper Limits
  60. GRB 080702B: GROND Upper Limits
  61. GRB 080703: Swift-XRT refined analysis
  62. GRB 080703: UVOT Follow-Up Observation
  63. GRB 080703, Swift-BAT refined analysis
  64. GRB 080702B Swift-BAT refined analysis
  65. GRB 080703: Swift detection of a burst with optical afterglow
  66. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  67. GRB 080702b: LCO optical observations
  68. Swift/UVOT observation of GRB080702A
  69. GRB 080702A: MITSuME Akeno optical upper limits
  70. GRB 080701A: Early RAPTOR optical limits
  71. Swift Trigger 315630: Swift/UVOT Upper Limits
  72. GRB 080702A, Swift-BAT refined analysis
  73. GRB 080702A: Swift-XRT Team refined analysis
  74. GRB 080702B : Burst detected in BAT during Swift slew
  75. Swift Trigger 315630: TLS R-band observation
  76. Swift Trigger 315630: Probably not a GRB
  77. GRB 080702: Swift detection of a short burst
  78. GRB 080701A: Swift/UVOT Upper Limits
  79. GRB 080701A: Early Super-LOTIS Observations
  80. GRB 080701A, Swift-BAT refined analysis
  81. Trigger 315630: Swift detection of a possible burst
  82. GRB 080701: Swift-XRT Prompt Analysis
  83. GRB 080701: Swift detection of a burst
  84. GRB 080623: Suzaku WAM observation of the prompt emission
  85. GRB 080625: Swift/UVOT Follow-Up Observations
  86. GRB 080625:Swift-XRT detection of the afterglow
  87. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  88. GRB 080623: GROND upper limits
  89. GRB080623: Swift UVOT followup observations
  90. GRB 080623, Swift-BAT refined analysis
  91. GRB 080623: TAROT La Silla observatory optical observations
  92. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  93. GRB 080623: Swift XRT prompt analysis
  94. GRB 080623: Swift detection of a burst
  95. Swift trigger 314975 is not a GRB
  96. Swift-BAT trigger 314975 possible burst
  97. GRB080613B: MITSuME upper limits
  98. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  99. Konus-Wind observation of GRB 080613B
  100. GRB 080613A: Swift-XRT detection of the afterglow

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