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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"

38575 results found.

  1. GRB 080503: Swift detection of a short burst
  2. GRB 080411: Continued Swift Monitoring
  3. GRB 080430: Optical observations
  4. GRB 080430: Shallow decay
  5. GRB080430: RTT150 Optical Observations
  6. GRB080430: Swift/UVOT observations
  7. VLA radio upper limit on GRB 080430
  8. GRB 080430 - multicolor observations of the afterglow
  9. GRB080430: optical observations
  10. GRB 080430: Hobby-Eberly Telescope Absorption Redshift
  11. GRB 080430: Swift-XRT refined analysis
  12. GRB 080430: Enhanced Swift-XRT position
  13. GRB 080430: Spectroscopy from CAHA
  14. GRB 080430 - SDSS Pre-Burst Observations
  15. GRB 080430: Bootes observation
  16. GRB 080430: Swift detection of a burst with optical afterglow
  17. GRB960202B - on the association with SN 1996cr
  18. GRB080426: Observations from CAHA
  19. GRB 080426: Swift-XRT refined analysis
  20. GRB080426: Swift/UVOT upper limits
  21. GRB 080426: Enhanced Swift-XRT position
  22. GRB 080426: Swift detection of a possibly short burst
  23. Possible GRB 080315: XRT non-detection of afterglow
  24. GRB 080320 : Faulkes Telescope North Observations
  25. GRB 080319A : Liverpool and Faulkes Telescopes Observations
  26. GRB080319A: MAGIC telescope GeV observation
  27. Swift-BAT trigger 309665 is not a GRB
  28. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  29. GRB 080420?: Swift detection of a possible short burst
  30. GRB080310, BVRcIc field calibration
  31. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  32. Swift XRT and UVOT observations of GRB080414
  33. GRB 080319B: Jet Break, Energetics, Supernova
  34. GRB 080413B: Faulkes Telescope South optical afterglow observations
  35. GRB 080413A: Liverpool Telescope and Faulkes Telescope South optical observations
  36. GRB 080413A: Suzaku WAM observation of the prompt emission
  37. GRB 080413B: Suzaku WAM observation of the prompt emission
  38. GRB 080413A: MOA-II optical afterglow observations
  39. GRB 080319B: Continued Gemini-N monitoring
  40. GRB 080414 Watcher observations
  41. GRB 080414: A long GRB detected by INTEGRAL
  42. VLA radio observations of GRB 080413B
  43. GRB 080413A: Gemini-South Spectroscopy
  44. GRB 080413B: Gemini-South Spectroscopy
  45. VLA radio observations of GRB 080413A
  46. IBAS Alert n. 5257 : not a GRB
  47. GRB080413B
  48. Swift-BAT spectral lag analysis of GRB 080413B
  49. GRB 080413a, SMARTS optical/IR afterglow observations
  50. GRB 080413B: Swift XRT refined analysis
  51. GRB080413A: Swift/UVOT observations
  52. GRB 080413A: Swift-XRT refined analysis
  53. GRB 080413A Bootes observation
  54. GRB 080413A: VLT/UVES redshift
  55. GRB 080413B: VLT redshift
  56. GRB080413B: REM NIR & Optical Observation
  57. GRB 080413B: GROND detection of afterglow in all bands
  58. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  59. GRB 080413A: REM detection of the NIR Afterglow
  60. GRB 080413: Enhanced Swift-XRT position
  61. GRB 080413: Swift detection of a burst with an optical afterglow
  62. GRB 080413: ROTSE-III Detection of Optical Counterpart
  63. GRB 080411: Swift/UVOT refined analysis
  64. GRB 080411, Swift-BAT refined analysis
  65. GRB 080411: Swift-XRT Refined Analysis
  66. Konus-Wind observation of GRB 080411
  67. GRB 080411: Enhanced Swift-XRT position
  68. GRB 080411: VLT redshift
  69. GRB 080411: GROND detection of optical afterglow candidate
  70. GRB080330: MAGIC telescope GeV observation
  71. GRB 080411: Swift detection of a bright burst
  72. GRB 080330: Swift-XRT refined position retraction
  73. GRB 080408: GROND detection of optical/NIR afterglow candidate
  74. GRB 080330 optical observations
  75. Swift/UVOT observations of GRB080409
  76. GRB 080409: Swift XRT refined analysis
  77. UVOT/Swift Observations of GRB080408
  78. GRB 080408: Swift-XRT position of a possible afterglow
  79. GRB 080409: Enhanced Swift-XRT position
  80. GRB 080409: REM optical/NIR observations
  81. GRB 080409: Swift detection of a burst
  82. GRB 080408: Analysis of AGILE Gamma-ray data
  83. GRB 080408: GRB Localization by SuperAGILE
  84. GRB 080319B: HST observations
  85. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  86. GRB 080405: Swift-BAT refined analysis
  87. GRB 080405: Swift-XRT position
  88. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  89. GRB 080325: optical upper limit
  90. GRB080330: Improved Swift XRT Position
  91. GRB080330: optical observations
  92. GRB 080319B: TORTORA light curve (Correction)
  93. GRB080328, RIMOTS optical upper limit
  94. GRB080330: optical observations
  95. GRB080330: Swift XRT refined analysis
  96. GRB 080330: REM optical observations
  97. GRB 080330, SMARTS optical/IR afterglow observations
  98. GRB 080330 Swift-UVOT refined analysis
  99. GRB 080328: Suzaku WAM observation of the prompt emission
  100. GRB080330: TNT optical observations

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