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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"

21904 results found.

  1. GRB 080805: Swift-XRT Refined Analysis
  2. GRB 080805: Swift/UVOT Upper Limits
  3. GRB 080804: Enhanced Swift-XRT position
  4. GRB080804: Gemini South redshift confirmation
  5. GRB 080804: Faulkes Telescope South observations
  6. GRB080805 optical limit by "Pi of the Sky"
  7. GRB 080805: Afterglow confirmation
  8. GRB 080805: GROND detection of possible afterglow
  9. GRB 080805: Swift detection of a burst
  10. GRB 080804: Swift detection of a burst with optical afterglow
  11. GRB 080802: Swift/UVOT Upper Limits
  12. GRB 080802: UVI Telescope Upper Limit
  13. GRB 080802: Swift detection of a probable burst
  14. GRB 080727C: Suzaku WAM observation of the prompt emission
  15. GRB 080727B: IR photometry
  16. GRB 080727C: TAROT Calern observatory optical observations
  17. GRB 080727B: KAIT photometry and an early lightcurve break
  18. GRB 080727C, Swift-BAT refined analysis
  19. GRB 080727C: Swift/UVOT Upper Limits
  20. GRB 080727C: Liverpool Telescope observations
  21. GRB 080727A: VLT upper limits
  22. GRB 080727C: Enhanced Swift-XRT position
  23. GRB080727C: RTT150 optical observations
  24. GRB 080727C: Swift detection of a burst
  25. Swift detection of XTE J1701-407
  26. GRB 080727B: Swift/UVOT Upper Limits
  27. GRB 080727A, Swift-BAT refined analysis
  28. GRB 080727A: Swift-XRT refined analysis
  29. GRB080727A: Swift/UVOT Upper Limits
  30. GRB 080727B: Enhanced Swift-XRT position
  31. GRB 080727A: Enhanced Swift-XRT position
  32. GRB 080727B: REM prompt observations
  33. GRB 080727B: Swift detection of a bright burst
  34. GRB 080727: Swift detection of a burst
  35. GRB 080726: GRB Localization by SuperAGILE
  36. GRB 080725, Swift-BAT refined analysis
  37. GRB 080723A: optical upper limit
  38. GRB080723B: Swift/UVOT Upper Limits
  39. GRB 080725: REM prompt observations
  40. Konus-Wind observation of GRB 080723B
  41. GRB 080723A: Swift/UVOT Upper Limits
  42. VLA radio upper limit on GRB 080721
  43. GRB 080723, Swift-BAT refined analysis
  44. GRB 080723B : a long GRB detected with INTEGRAL
  45. GRB 080723: Enhanced Swift-XRT position
  46. GRB 080723: Swift detection of a burst
  47. Konus-Wind observation of GRB 080721
  48. GRB 080721: Enhanced Swift-XRT position
  49. GRB 080721, Swift-BAT refined analysis
  50. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  51. Trigger 317393: Swift detection of a possible GRB
  52. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  53. GRB 080714: GROND confirmation of the optical/NIR afterglow
  54. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  55. GRB 080714: Enhanced Swift-XRT position
  56. GRB 080714: Swift-BAT refined analysis
  57. GRB 080714: Swift detection of a burst
  58. GRB 080702A: optical upper limit
  59. GRB 080603A: CrAO optical observations
  60. GRB 080702B: Swift XRT confirmation of the afterglow
  61. GRB 080710: Lick IR detection
  62. GRB 080710: Swift-XRT refined analysis
  63. GRB080710: Swift/UVOT observations
  64. GRB 080710: Enhanced Swift-XRT position
  65. UVOT white band observations of GRB080710
  66. GRB 080710: REM afterglow confirmation & brightening
  67. GRB 080710: Swift XRT position
  68. GRB 080707: GROND Confirmation of the Optical Afterglow
  69. UVOT observations of GRB080707
  70. GRB 080707: Swift XRT refined analysis
  71. GRB 080707: Enhanced Swift-XRT position
  72. GRB 080707: VLT redshift
  73. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  74. GRB 080707: Swift detection of a burst
  75. Trigger 316063: Swift detection of a transient
  76. GRB 080703: GROND Upper Limits
  77. GRB 080702B: GROND Upper Limits
  78. GRB 080703: VLT observations of the afterglow
  79. GRB 080703: Enhanced Swift-XRT position
  80. GRB 080703, Swift-BAT refined analysis
  81. GRB 080703: Swift detection of a burst with optical afterglow
  82. No radio detection from the short GRB 080702A
  83. Swift/UVOT observation of GRB080702A
  84. GRB 080702B: Swift XRT and UVOT observations
  85. GRB 080625: Suzaku WAM observation of the prompt emission
  86. GRB 080701A: Early RAPTOR optical limits
  87. Swift Trigger 315630: Swift/UVOT Upper Limits
  88. GRB 080702A: Swift-XRT Team refined analysis
  89. GRB 080702B : Burst detected in BAT during Swift slew
  90. GRB 080702A: Enhanced Swift-XRT position
  91. Swift Trigger 315630: TLS R-band observation
  92. Swift Trigger 315630: Probably not a GRB
  93. GRB 080702: Swift detection of a short burst
  94. GRB 080701A, VATT optical upper limit
  95. TLS I-Band Observation of GRB 080701A
  96. GRB 080701A: Swift/UVOT Upper Limits
  97. GRB 080701: Enhanced Swift-XRT position
  98. Trigger 315630: Swift detection of a possible burst
  99. GRB 080701: Swift-XRT Prompt Analysis
  100. GRB 080623: Suzaku WAM observation of the prompt emission

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