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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"

38586 results found.

  1. GRB 080727C: Swift detection of a burst
  2. Swift detection of XTE J1701-407
  3. GRB 080727B: Swift/UVOT Upper Limits
  4. BAT Trigger 318150 is not a GRB
  5. GRB 080727B: Swift-XRT refined analysis
  6. GRB 080727A: Swift-XRT refined analysis
  7. GRB080727A: Swift/UVOT Upper Limits
  8. GRB 080727B: Enhanced Swift-XRT position
  9. GRB 080727A: Enhanced Swift-XRT position
  10. GRB 080727B: KAIT observations
  11. GRB 080727B: REM prompt observations
  12. GRB 080727B: Swift detection of a bright burst
  13. GRB 080727: Swift detection of a burst
  14. GRB 080726: GRB Localization by SuperAGILE
  15. GRB 080723A: optical upper limit
  16. GRB080723B: Swift/UVOT Upper Limits
  17. GRB 080725: REM prompt observations
  18. Konus-Wind observation of GRB 080723B
  19. GRB 080725: Swift detection of a burst
  20. ATCA radio upper limit on GRB 080723B
  21. GRB 080723A: Swift/UVOT Upper Limits
  22. VLA radio upper limit on GRB 080721
  23. GRB 080723B - correction to flux conversion factor
  24. GRB 080723B - Swift-XRT refined analysis
  25. GRB 080723B - Swift-XRT position
  26. GRB 080723B: AGILE GRID and MCAL results
  27. GRB 080723B : Planned XMM-Newton observation
  28. GRB 080723A: Swift-XRT refined analysis
  29. GRB 080723B: Detection and Localization by SuperAGILE
  30. GRB 080723B : a long GRB detected with INTEGRAL
  31. GRB 080723: Enhanced Swift-XRT position
  32. GRB 080723: Swift detection of a burst
  33. GRB 080721 : Lulin 2nd optical follow-ups
  34. GRB 080721: OA fading and redshift
  35. TNG/DOLORES redshift for GRB080721
  36. GRB 080721: UVOT Follow-Up Observations
  37. Konus-Wind observation of GRB 080721
  38. GRB 080721: Swift-XRT refined analysis
  39. GRB 080721: Enhanced Swift-XRT position
  40. GRB 080721: Swift/UVOT Photometric Redshift
  41. GRB 080721 : Lulin Optical follow-ups
  42. GRB 080721: Swift-XRT correct position
  43. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  44. Retraction of Swift Trigger 317393
  45. Trigger 317393: Swift detection of a possible GRB
  46. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  47. GRB 080714: GROND confirmation of the optical/NIR afterglow
  48. Konus-Wind observation of GRB 080714
  49. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  50. GRB 080714: Swift-XRT refined analysis
  51. GRB 080714: Enhanced Swift-XRT position
  52. GRB 080714: Swift-BAT refined analysis
  53. GRB 080714: Swift detection of a burst
  54. GRB 080702A: optical upper limit
  55. GRB 080603A: CrAO optical observations
  56. GRB 080603B: optical observations in MAO
  57. GRB 080603B: optical observations in CrAO
  58. GRB 080710: Optical observation with MITSuME Okayama
  59. GRB 080702B: Swift XRT confirmation of the afterglow
  60. GRB 080710: Lick IR detection
  61. GRB 0800707: optical observations
  62. GRB 080710: Swift-XRT refined analysis
  63. GRB080710: Swift/UVOT observations
  64. GRB 080710: Enhanced Swift-XRT position
  65. GRB 080710: Faulkes Telescope North observations
  66. GRB 080710: Gemini spectroscopy and probable redshift
  67. UVOT white band observations of GRB080710
  68. GRB 080710: REM afterglow confirmation & brightening
  69. GRB 080710: KAIT OA candidate
  70. GRB 080710: Swift XRT position
  71. GRB 080710: Swift detection of a burst
  72. GRB 080707: possible break in the X-rays
  73. New Swift-XRT GRB products available online.
  74. GRB 080707: GROND Confirmation of the Optical Afterglow
  75. UVOT observations of GRB080707
  76. GRB 080707: Swift XRT refined analysis
  77. GRB 080707: Enhanced Swift-XRT position
  78. GRB 080707: VLT redshift
  79. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  80. GRB 080707: Swift detection of a burst
  81. Trigger 316063: Swift detection of a transient
  82. GRB 080703: GROND Upper Limits
  83. GRB 080702B: GROND Upper Limits
  84. GRB 080703: UVOT Follow-Up Observation
  85. GRB 080703: VLT observations of the afterglow
  86. GRB 080703: Enhanced Swift-XRT position
  87. GRB 080702B Swift-BAT refined analysis
  88. GRB 080703: Swift detection of a burst with optical afterglow
  89. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  90. No radio detection from the short GRB 080702A
  91. GRB 080702b: LCO optical observations
  92. Swift/UVOT observation of GRB080702A
  93. GRB 080702B: Swift XRT and UVOT observations
  94. GRB 080625: Suzaku WAM observation of the prompt emission
  95. GRB 080702A: MITSuME Akeno optical upper limits
  96. Swift Trigger 315630: Swift/UVOT Upper Limits
  97. GRB 080702A: Swift-XRT Team refined analysis
  98. GRB 080702A: Enhanced Swift-XRT position
  99. Swift Trigger 315630: TLS R-band observation
  100. Swift Trigger 315630: Probably not a GRB

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