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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"

15387 results found.

  1. Swift UVOT observations of GRB 090102
  2. GRB 081230: GROND confirmation of the afterglow
  3. GRB 081230 Swift/UVOT Observations
  4. GRB 081228: GROND confirmation of the optical/NIR afterglow
  5. GRB 081226B: Fermi GBM observation
  6. GRB 081226C: Fermi GBM detection
  7. GRB 081228: Swift/UVOT Upper Limits
  8. GRB 081228: detection by GROND
  9. VLA radio observation of GRB 081221
  10. GRB 081226B: Swift XRT and UVOT upper limits
  11. GRB 081224: Suzaku WAM observation of the prompt emission
  12. GRB 081226: Swift-XRT refined analysis
  13. GRB 081226A: Swift UVOT Upper Limits
  14. GRB 081226B: a short-hard GRB detected by INTEGRAL
  15. GRB 080810: optical observations
  16. GRB081224: LAT retraction
  17. GRB 081224: Fermi GBM Detection & LAT Localization
  18. GRB 080810: optical observations
  19. Konus-Wind observation of GRB 081222
  20. GRB 081223: Fermi GBM detection
  21. GRB 081221: GROND observations
  22. GRB 081222: Gemini-N confirmation of redshift z=2.77
  23. Konus-Wind observation of very bright GRB 081215A
  24. Swift/UVOT observations of GRB 081221
  25. IPN triangulation of bright GRB 081215A
  26. GRB 081221: Swift-XRT Refined Analysis
  27. GRB 081222: Faulkes Telescope South observations
  28. GRB 081221: Gemini-N nIR imaging
  29. Konus-Wind observation of GRB 081221
  30. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  31. GRB 081221: further NOT observations
  32. GRB081215A: Fermi-LAT observations
  33. GRB 081215B: Fermi GBM detection
  34. GRB 081216: Suzaku WAM observation of the prompt emission
  35. GRB 081215A: Fermi GBM detection (correction to event fluence)
  36. GRB 081215A: Fermi GBM detection
  37. IPN localization of short hard GRB 081216
  38. GRB 081118: Zadko observations
  39. GRB 081209: Fermi GBM detection
  40. GRB 081211B(?): Possible burst detection from Swift-BAT slew data
  41. GRB 081211: Swift/UVOT detection of an optical afterglow
  42. GRB 081210: Swift/UVOT refined analysis
  43. Konus-Wind observation of GRB 081209
  44. IPN triangulation of short hard GRB 081209
  45. GRB 081206: Fermi GBM detection
  46. GRB 081128: afterglow observations
  47. GRB 081203B: Suzaku WAM observation of the prompt emission
  48. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  49. GRB 081203B: Gemini observations
  50. GRB 081128: optical observation in CrAO
  51. GRB 081204: GROND Observations
  52. GRB 081204: Swift XRT afterglow confirmation
  53. GRB 081204 : a long GRB localized by INTEGRAL
  54. Swift-XRT observations of GRB 081203B
  55. Konus-Wind observation of GRB 081203A
  56. Konus-Wind observation of GRB 081203B
  57. Swift/UVOT detection of GRB081203B
  58. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  59. GRB 081203A: Burst detection from Swift-BAT slew data
  60. GRB 081128: optical observation
  61. GRB 081130B: Fermi GBM detection
  62. GRB 081128: Liverpool Telescope afterglow confirmation
  63. GRB081128: optical observations
  64. GRB081128 : Lulin optical follow-ups
  65. GRB 081126: Confirmation of the Optical Afterglow
  66. Konus-Wind observation of GRB 081126
  67. GRB 081126: Swift detection of a burst
  68. GRB 081125: Fermi GBM detection
  69. GRB 081122: Fermi GBM detection
  70. Konus-Wind observation of GRB 081121
  71. GRB081121: Refined Swift/UVOT observations
  72. GRB 081121: Swift-XRT refined analysis
  73. GRB 081121: GROND observations
  74. GRB081118 : optical upper limit
  75. GRB 081118: GROND detection of afterglow
  76. GRB 081118: Swift UVOT Upper Limits
  77. Further Swift-XRT observations of the probable GRB 081105.
  78. GRB 081102: MASTER refind and final results
  79. GRB 081109: GROND redshift limit and host extinction
  80. GRB 081109: GROND Detection of the Optical/NIR Afterglow Candidate
  81. GRB 081109A: Possible Swift-UVOT detection
  82. GRB 081109A: Swift-XRT refined analysis
  83. GRB 081109: Fermi GBM detection
  84. GRB 081109: Swift/UVOT upper limits
  85. GRB 081109A optical upper limit
  86. GRB 081109: REM NIR afterglow detection
  87. GRB 081028 - PAIRITEL NIR detection
  88. GRB 081024C: Fermi Gamma-ray Burst Monitor detection
  89. GRB 081104: GROND found no Optical/NIR Afterglow
  90. GRB 081105: GROND Upper Limits
  91. GRB 081101B: Fermi GBM detection
  92. GRB 081105 Swift/BAT and IPN Localization
  93. GRB 081104: GROND Detection of the Optical/NIR Afterglow Candidate?
  94. GRB 081104: refined XRT analysis
  95. Fermi-GBM detection of a Solar Flare
  96. GRB 081104 : Faulkes Telescope South observations
  97. GRB 081102: MASTER prompt optical limit
  98. GRB 081102: Swift/UVOT refined analysis
  99. GRB 081024B: BTA deep optical observations
  100. GRB 081029: UVOT Detection of the Optical Afterglow

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