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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"

26533 results found.

  1. GRB 080514B: slow fading behaviour ?
  2. GRB 080514B: Swift-XRT analysis
  3. GRB 080514B, GROND observations
  4. GRB 080515: Swift detection of a burst
  5. GRB 080514B: SuperAGILE/IPN GRB Localization
  6. Swift detection of a possible galactic transient
  7. Konus-Wind observation of GRB 080507
  8. GRB 080507: Suzaku WAM observation of the prompt emission
  9. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  10. GRB 080507: Keck photometry
  11. GRB 080507: E Pur Si Muove!
  12. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  13. GRB 080506:Optical observations from HCT
  14. GRB 080506: VLA radio upper limit
  15. GRB 080507: GRB localization by SuperAGILE
  16. GRB 080506: Swift XRT refined analysis
  17. GRB 080506, Swift-BAT refined analysis
  18. GRB 080506: Observations from NOT
  19. GRB 080506: Enhanced Swift-XRT position
  20. GRB 080506: Swift detection of a burst with optical afterglow
  21. GRB 080503: VLA radio upper limit
  22. GRB 080503: Observations from NOT
  23. GRB 080503: Slow-rise optical AG ?
  24. GRB 080430: TLS imaging one day after the GRB
  25. GRB 080503: No further optical rebrightening
  26. GRB080503 XRT refined analysis
  27. GRB 080503, Swift-BAT refined analysis
  28. GRB 080430
  29. GRB 080503: Enhanced Swift-XRT position
  30. GRB 080503: Swift detection of a short burst
  31. GRB080430: RTT150 Optical Observations
  32. GRB080430: Swift/UVOT observations
  33. VLA radio upper limit on GRB 080430
  34. GRB 080430 - multicolor observations of the afterglow
  35. GRB 080430, Swift-BAT refined analysis
  36. GRB 080430: Swift-XRT refined analysis
  37. GRB 080430: Enhanced Swift-XRT position
  38. GRB 080430 - SDSS Pre-Burst Observations
  39. GRB 080430: Swift detection of a burst with optical afterglow
  40. GRB 080430: TAROT Calern observatory optical observations
  41. GRB 080426: Swift-XRT refined analysis
  42. GRB 080426: Enhanced Swift-XRT position
  43. GRB 080426, Swift-BAT refined analysis
  44. GRB 080426: Swift detection of a possibly short burst
  45. GRB 080320 : Faulkes Telescope North Observations
  46. GRB 080319A : Liverpool and Faulkes Telescopes Observations
  47. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  48. GRB 080420?: Swift detection of a possible short burst
  49. GRB080310, BVRcIc field calibration
  50. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  51. Swift XRT and UVOT observations of GRB080414
  52. GRB 080319B: Jet Break, Energetics, Supernova
  53. GRB 080413A: Suzaku WAM observation of the prompt emission
  54. GRB 080413B: Suzaku WAM observation of the prompt emission
  55. GRB 080413A: MOA-II optical afterglow observations
  56. GRB 080319B: Continued Gemini-N monitoring
  57. GRB 080414: RTT150 optical observations
  58. GRB 080414: A long GRB detected by INTEGRAL
  59. VLA radio observations of GRB 080413B
  60. GRB 080413A: Gemini-South Spectroscopy
  61. GRB 080413B: Gemini-South Spectroscopy
  62. VLA radio observations of GRB 080413A
  63. GRB 080413B: Ep,i-Eiso correlation
  64. GRB 080413a, SMARTS optical/IR afterglow observations
  65. GRB 080413B: Swift XRT refined analysis
  66. GRB080413A: Swift/UVOT observations
  67. GRB 080413B, Swift-BAT refined analysis
  68. GRB 080413A: Swift-XRT refined analysis
  69. GRB 080413A, Swift-BAT refined analysis
  70. GRB 080413A Bootes observation
  71. GRB 080413B: GROND detection of afterglow in all bands
  72. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  73. GRB 080413: Enhanced Swift-XRT position
  74. GRB 080413: TAROT Calern observatory optical observations
  75. GRB 080411: Swift/UVOT refined analysis
  76. GRB 080411, Swift-BAT refined analysis
  77. GRB 080411: Swift-XRT Refined Analysis
  78. Konus-Wind observation of GRB 080411
  79. GRB 080411: Enhanced Swift-XRT position
  80. GRB 080411: GROND detection of optical afterglow candidate
  81. GRB 080411: Swift detection of a bright burst
  82. GRB 080330: Swift-XRT refined position retraction
  83. GRB 080409: Swift-BAT refined analysis
  84. GRB 080408: GROND detection of optical/NIR afterglow candidate
  85. GRB 080330 optical observations
  86. GRB 080408: Swift-XRT position of a possible afterglow
  87. GRB 080409: Enhanced Swift-XRT position
  88. GRB 080409: Swift detection of a burst
  89. GRB 080408: Analysis of AGILE Gamma-ray data
  90. GRB 080408: GRB Localization by SuperAGILE
  91. GRB 080319A: Early RAPTOR optical limits
  92. GRB 080330: RAPTOR detection of prompt optical flash
  93. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  94. GRB 080405: Swift-BAT refined analysis
  95. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  96. GRB 080325: optical upper limit
  97. GRB 080328: GAO 150cm telescope Optical Observation
  98. GRB080330: Improved Swift XRT Position
  99. GRB 080319B: TORTORA light curve (Correction)
  100. GRB080330: Swift XRT refined analysis

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