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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"

26532 results found.

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

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